CN118129634B - Steel structure deformation monitoring method and system - Google Patents

Abstract

The invention provides a steel structure deformation monitoring method and system, and relates to the technical field of deformation monitoring. The method comprises the following steps: setting deformation measuring devices at set positions of all side surfaces of the steel structure support column, establishing a three-dimensional coordinate system by taking the centroid of the connecting surface of the steel structure support column and the ground plane as an origin, and acquiring a plurality of first distance data and second distance data at a plurality of set positions of four side surfaces of the steel structure support column; and further determining the surface coordinate positions of the measurement positions of the surfaces of the steel structure struts measured by the first laser distance meters in the three-dimensional coordinate system at all set positions of all sides, and further determining the deformation conditions of the steel structure struts. According to the invention, the deformation conditions of the steel structure support in multiple aspects can be monitored in real time through the surface coordinate position of the steel structure support in the three-dimensional coordinate system, the deformation abnormal conditions can be found in time, and the steel structure deformation monitoring efficiency is improved.

Description

Steel structure deformation monitoring method and system

Technical Field

The invention relates to the technical field of deformation monitoring, in particular to a steel structure deformation monitoring method and system.

Background

CN115683038a discloses an intelligent monitoring method for safety and stability of a building steel structure, which comprises a monitoring device for realizing the monitoring method, wherein the monitoring device comprises a first installation part, a second installation part and a monitoring mechanism, the first installation part and the second installation part are respectively connected with two butted steel structures through a fixing mechanism, and the first installation part and the second installation part are connected through a flexible connection pad, so that relative movement can occur between the first installation part and the second installation part, and the monitoring mechanism comprises a detection rope, a winding shaft, a torsion spring and a rotation detector. According to the intelligent monitoring method for the safety stability of the building steel structure, the first installation part, the second installation part and the steel structure are connected, so that the installation of monitoring equipment is realized, the deformation of the steel structure can be automatically monitored by the rotation of the subsequent matched rolling shaft, the safety stability of the steel structure is reflected, the real-time monitoring of the deformation can be realized, and the workload of the subsequent monitoring is reduced.

CN116399289a discloses a building steel structure deformation detection device, relates to building steel structure technical field, including the base, the lower lateral wall symmetry fixedly connected with support column of base, the pulley is all installed to the lower extreme of every support column, and the last lateral wall symmetry rotation of base is connected with threaded rod one, and the common threaded connection of the outer wall of threaded rod one has the lifter plate, and the equal fixed cover of the outer wall of threaded rod one that is located same one side is equipped with the belt pulley one that is located the lifter plate below, and the last lateral wall fixedly connected with of base is located motor one between two threaded rods one, drive end fixedly connected with belt pulley two of motor one. The deformation structure of the steel structure to be measured on the horizontal line and the longitudinal horizontal line can be clearly obtained through the pressure values measured by the pressure sensor in the horizontal direction and the longitudinal direction, if the pressure values are the same, the steel structure to be measured does not deform, if the pressure values are inconsistent, the deformation is generated, and the intuitiveness of the data can more accurately measure the deformation of the steel structure to be measured.

The steel structure pillar is one of the main building structure types in engineering projects, the steel structure pillar is arranged to form a stable longitudinal framework, the longitudinal rigidity of a steel structure factory building is guaranteed, after the steel structure pillar is installed, the safety and stability of the steel structure pillar are required to be monitored, in the related technology, the monitoring mode of the deformation condition of the steel structure pillar is complex, the deformation condition of the steel structure pillar is difficult to timely survey, a large measurement error exists, the steel structure pillar is difficult to monitor stably in real time, and a large potential safety hazard exists.

The information disclosed in the background section of the application is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The embodiment of the invention provides a steel structure deformation monitoring method and system, which can solve the technical problem that the deformation condition of a steel structure is difficult to determine in time in the related technology.

According to a first aspect of an embodiment of the present invention, there is provided a method comprising: a deformation measuring device is arranged at a j-th set position of an i-th side surface of a steel structure support column, wherein the deformation measuring device comprises a connecting rod, a hanging rod, a plurality of first laser rangefinders and a second laser rangefinder, one end of the connecting rod is provided with an adsorption device for adsorbing the connecting rod on the surface of the steel structure support column, the axial direction of the connecting rod is perpendicular to the surface of the steel structure support column, the other end of the connecting rod is connected with the upper end of the hanging rod, the hanging rod is in a hanging state, the axial direction of the hanging rod is perpendicular to a ground plane, the hanging rod is axially and uniformly provided with the plurality of first laser rangefinders, the direction of laser emitted by the first laser rangefinder is perpendicular to the axial direction of the hanging rod and is used for measuring first distance data between the first laser rangefinder and the surface of the steel structure support column, the second laser rangefinder is positioned at the lower end of the hanging rod and is used for measuring second distance data between the second laser rangefinder and the ground plane, i4,j is more than or equal to 1, and j is a positive integer; establishing a three-dimensional coordinate system by taking the centroid of the connection surface of the steel structure support column and the ground plane as an origin, wherein the XOY plane of the three-dimensional coordinate system is the ground plane, the X axis of the three-dimensional coordinate system is perpendicular to a first side line and a third side line of the connection surface, the Y axis of the three-dimensional coordinate system is perpendicular to a second side line and a fourth side line of the connection surface, the first side line of the connection surface is the intersection line of the first side surface of the steel structure support column and the ground plane, the second side line of the connection surface is the intersection line of the second side surface of the steel structure support column and the ground plane, the third side line of the connection surface is the intersection line of the third side surface of the steel structure support column and the ground plane, and the fourth side line of the connection surface is the intersection line of the fourth side surface of the steel structure support column and the ground plane, and the Z axis of the three-dimensional coordinate system is perpendicular to the ground plane; acquiring a plurality of first distance data and second distance data at a plurality of set positions of four sides of the steel structure strut; determining surface coordinate positions of the measurement positions of the surfaces of the steel structure struts measured by the first laser range finders in the three-dimensional coordinate system at all set positions of all sides according to the first distance data and the second distance data; and determining the deformation condition of the steel structure support according to the surface coordinate position.

According to a second aspect of the present invention, there is provided a steel structure deformation monitoring system comprising: the deformation measuring device is arranged at a j-th set position of an i-th side surface of the steel structure support, and comprises a connecting rod, a hanging rod, a plurality of first laser rangefinders and a second laser rangefinder, wherein one end of the connecting rod is provided with an adsorption device for adsorbing the connecting rod on the surface of the steel structure support, enabling the axial direction of the connecting rod to be perpendicular to the surface of the steel structure support, the other end of the connecting rod is connected with the upper end of the hanging rod, enabling the hanging rod to be in a hanging state, enabling the axial direction of the hanging rod to be perpendicular to a ground plane, the axial direction of the hanging rod is uniformly provided with the plurality of first laser rangefinders, the direction of laser emitted by the first laser rangefinder is perpendicular to the axial direction of the hanging rod, the first laser rangefinder is used for measuring first distance data between the first laser rangefinder and the surface of the steel structure support, the second laser rangefinder is located at the lower end of the hanging rod and is used for measuring second distance data between the second laser rangefinder and the ground plane, and i is equal to or more than 1 and 4,j and is equal to or less than or equal to positive integer j; the three-dimensional coordinate system building module is used for building a three-dimensional coordinate system by taking the centroid of the connection surface of the steel structure support column and the ground plane as an origin, wherein an XOY plane of the three-dimensional coordinate system is the ground plane, an X axis of the three-dimensional coordinate system is perpendicular to a first side line and a third side line of the connection surface, a Y axis of the three-dimensional coordinate system is perpendicular to a second side line and a fourth side line of the connection surface, the first side line of the connection surface is an intersection line of a first side surface of the steel structure support column and the ground plane, the second side line of the connection surface is an intersection line of a second side surface of the steel structure support column and the ground plane, the third side line of the connection surface is an intersection line of a third side surface of the steel structure support column and the ground plane, and the fourth side line of the connection surface is an intersection line of a fourth side surface of the steel structure support column and the ground plane, and the Z axis of the three-dimensional coordinate system is perpendicular to the ground plane; the distance data acquisition module is used for acquiring a plurality of first distance data and second distance data at a plurality of set positions of four sides of the steel structure support column; a surface coordinate position determining module for determining a surface coordinate position of a measurement position of the surface of the steel structure pillar measured by each first laser range finder in the three-dimensional coordinate system at each set position of each side surface according to the first distance data and the second distance data; and the deformation condition determining module is used for determining the deformation condition of the steel structure support column according to the surface coordinate position.

The technical effects are as follows: according to the invention, the deformation measuring device can be arranged at the preset position of each side surface of the steel structure support, the centroid of the connection surface of the steel structure support and the ground plane is taken as the origin, a three-dimensional coordinate system is established, and then a plurality of first distance data and second distance data are acquired at a plurality of set positions of four side surfaces of the steel structure support, so that the surface coordinate position of the surface of the steel structure support, which is measured by each first laser range finder, in the three-dimensional coordinate system is determined at each set position of each side surface, and the deformation condition of the steel structure support is further determined. Therefore, through the surface coordinate position of the steel structure support in the three-dimensional coordinate system, whether the steel structure support is inclined or bent or not is observed in real time, the steel structure deformation monitoring efficiency is improved, and the probability of accidents is reduced. When the surface position coordinates are determined, deformation measuring devices can be arranged on each side face of the steel structure support column, the centroid of the connection face of the steel structure support column and the ground plane is taken as an origin, a three-dimensional coordinate system is established, the first position coordinates of each first laser range finder on each side face in the three-dimensional coordinate system and the surface coordinate positions of the steel structure support column can be determined according to the first distance data and the second distance data, therefore deformation conditions of the steel structure support column can be monitored, changes of the surface coordinate positions can be captured in time, errors for judging the deformation conditions are reduced, an accurate data base is provided for judging the deformation conditions of the steel structure support column, and monitoring timeliness and accuracy are improved. When the deformation condition score is determined, when the steel structure strut is inclined, the inclination angles of the steel structure strut to the four sides can be determined, when the structure strut is bent, the surface vectors between the adjacent surface coordinate positions can be determined according to the plurality of surface coordinate positions on the same side, the included angle between the adjacent surface vectors can be further determined, and the maximum value of the included angle between the plurality of adjacent surface vectors in the four sides can be further determined as the maximum bending angle. Furthermore, the maximum inclination angle and the maximum bending angle can be weighted and summed, and then the deformation condition score is determined, so that the deformation condition score can objectively and accurately reflect the deformation degree of the steel structure support in the aspects of inclination and bending, a data basis is provided for overhauling the steel structure support, and the accuracy of monitoring the deformation of the steel structure is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed. Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other embodiments may be obtained according to these drawings without inventive effort to a person skilled in the art;

Fig. 1 exemplarily shows a flowchart of a steel structure deformation monitoring method according to an embodiment of the present invention:

FIG. 2 schematically illustrates a deformation measurement device according to an embodiment of the present invention;

FIG. 3 schematically illustrates a three-dimensional coordinate system according to an embodiment of the invention;

FIG. 4 schematically illustrates a steel structure strut in a tilted condition according to an embodiment of the present invention;

FIG. 5 schematically illustrates a steel structure deformation monitoring system according to an embodiment of the present invention;

reference numerals: 11-steel structure pillar, 12-connecting rod, 13-suspension rod, 14-first laser range finder, 15-second laser range finder.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Fig. 1 schematically illustrates a flow chart of a method for monitoring deformation of a steel structure according to an embodiment of the present invention, the method comprising: step S101, setting a deformation measuring device at the j-th set position of the i-th side surface of the steel structure support 11, wherein the deformation measuring device comprises a connecting rod 12, a hanging rod 13, a plurality of first laser distance meters 14 and a second laser distance meter 15, one end of the connecting rod 12 is provided with an adsorption device for adsorbing the connecting rod 12 on the surface of the steel structure support 11, the axial direction of the connecting rod 12 is perpendicular to the surface of the steel structure support 11, the other end of the connecting rod 12 is connected with the upper end of the hanging rod 13, the hanging rod 13 is in a hanging state, the axial direction of the hanging rod 13 is perpendicular to a ground plane, a plurality of first laser distance meters 14 are uniformly arranged in the axial direction of the hanging rod 13, the direction of laser emitted by the first laser distance meters 14 is perpendicular to the axial direction of the hanging rod 13, the first laser distance meters 14 are used for measuring first distance data between the first laser distance meters 14 and the surface of the steel structure support 11, the second laser distance meters 15 are located at the lower end of the hanging rod 13, the second laser distance data are used for measuring second distance data between the first laser distance meters 14 and the surface of the steel structure support 11, j and the second laser distance data are equal to or more than or equal to or less than or equal to positive integer j and equal to or less than or equal to j is equal to or equal to and equal to j is equal to positive and equal to j is equal to or less to j is equal to the integer and is equal to the j is equal to the distance j is measured between the distance is measured is j is measured; step S102, a three-dimensional coordinate system is established by taking the centroid of the connection surface of the steel structure support 11 and the ground plane as an origin, wherein the XOY plane of the three-dimensional coordinate system is the ground plane, the X axis of the three-dimensional coordinate system is perpendicular to a first side line and a third side line of the connection surface, the Y axis of the three-dimensional coordinate system is perpendicular to a second side line and a fourth side line of the connection surface, the first side line of the connection surface is an intersection line of the first side surface of the steel structure support 11 and the ground plane, the second side line of the connection surface is an intersection line of the second side surface of the steel structure support 11 and the ground plane, the third side line of the connection surface is an intersection line of the third side surface of the steel structure support 11 and the ground plane, and the fourth side line of the connection surface is an intersection line of the fourth side surface of the steel structure support 11 and the ground plane, and the Z axis of the three-dimensional coordinate system is perpendicular to the ground plane; step S103, acquiring a plurality of first distance data and second distance data at a plurality of set positions of four sides of the steel structure pillar 11; step S104 of determining, from the first distance data and the second distance data, a surface coordinate position in the three-dimensional coordinate system of a measurement position of the surface of the steel structure column 11 measured by each first laser range finder 14 at each set position of each side surface; and step S105, determining the deformation condition of the steel structure support 11 according to the surface coordinate position.

According to the steel structure deformation monitoring method, deformation measuring devices can be arranged at preset positions of all sides of the steel structure support 11, a three-dimensional coordinate system is established by taking the centroid of the connection surface of the steel structure support 11 and the ground plane as an origin, and then a plurality of first distance data and second distance data are acquired at a plurality of set positions of four sides of the steel structure support 11, so that the surface coordinate positions of the measured positions of the surfaces of the steel structure support 11, measured by all the first laser distance measuring devices 14, in the three-dimensional coordinate system are determined at all the set positions of all the sides, and further the deformation condition of the steel structure support 11 is determined. Therefore, through the surface coordinate position of the steel structure support 11 in the three-dimensional coordinate system, whether the steel structure support 11 has deformation conditions such as inclination or bending or not is observed in real time, the steel structure deformation monitoring efficiency is improved, and the probability of accidents is reduced.

According to an embodiment of the present invention, in step S101, at the j-th set position of the i-th side of the steel structure pillar 11, a deformation measuring device is provided, wherein the deformation measuring device includes a connecting rod 12, a suspension rod 13, a plurality of first laser rangefinders 14, and a second laser rangefinder 15, one end of the connecting rod 12 is provided with an adsorption device, for example, an adsorption device such as a magnet, which can adsorb the connecting rod 12 on the surface of the steel structure pillar 11, and make the axial direction of the connecting rod 12 perpendicular to the surface of the steel structure pillar 11. The other end of the connecting rod 12 is connected with the upper end of the suspension rod 13, and the connecting mode of the connecting rod 12 and the upper end of the suspension rod 13 can be soft connection, so that the suspension rod 13 is always in a suspension state, and the axial direction of the suspension rod 13 is vertical to the ground plane, namely, if the steel structure support 11 has the problems of inclination, deformation and the like, so that the connecting rod 12 is not parallel to the ground, the suspension rod 13 and the connecting rod 12 are not kept vertical, but are kept vertical to the ground. The axial direction of the suspension rod 13 is uniformly provided with a plurality of first laser range finders 14, the direction of laser emitted by the first laser range finders 14 is perpendicular to the axial direction of the suspension rod 13, the first laser range finders 14 are used for measuring first distance data between the surfaces of the first laser range finders 14 and the steel structure support 11, the second laser range finders 15 are located at the lower end of the suspension rod 13 and are used for measuring second distance data between the second laser range finders 15 and a ground plane, i is not less than 1 and not more than 4,j and not less than 1, and i and j are positive integers.

Fig. 2 schematically shows a deformation measuring device according to an embodiment of the present invention. The rectangle that is perpendicular to ground in fig. 2 shows the steel construction pillar 11 that does not produce deformation, and is perpendicular to steel construction pillar 11's rectangle shows connecting rod 12, the one end of connecting rod 12 is provided with adsorption equipment, makes connecting rod 12 in steel construction pillar 11's surface is perpendicular through adsorption equipment, and hanging pole 13 is connected to connecting rod 12's the other end, evenly is provided with a plurality of first laser rangefinder 14 on hanging pole 13 to set up the second laser rangefinder 15 at hanging pole 13's tail end, wherein, the laser orientation of first laser rangefinder 14 is on a parallel with ground, the laser of second laser rangefinder 15 is perpendicular to ground.

According to the embodiment of the present invention, in step S102, a three-dimensional coordinate system is established with the centroid of the connection surface of the steel structural pillar 11 and the ground plane as the origin, wherein the XOY plane of the three-dimensional coordinate system is the ground plane, the X-axis of the three-dimensional coordinate system is perpendicular to the first side line and the third side line of the connection surface, the Y-axis of the three-dimensional coordinate system is perpendicular to the second side line and the fourth side line of the connection surface, the first side line of the connection surface is the intersection line of the first side surface of the steel structural pillar 11 and the ground plane, the second side line of the connection surface is the intersection line of the second side surface of the steel structural pillar 11 and the ground plane, the third side line of the connection surface is the intersection line of the third side surface of the steel structural pillar 11 and the ground plane, and the fourth side line of the connection surface is the intersection line of the fourth side surface of the steel structural pillar 11 and the ground plane, and the Z-axis of the three-dimensional coordinate system is perpendicular to the ground plane.

Fig. 3 is a schematic view schematically showing a three-dimensional coordinate system according to an embodiment of the present invention, in which the rectangular parallelepiped in fig. 3 represents a steel structure pillar 11, the three-dimensional coordinate system is established with the centroid of the connection surface of the steel structure pillar 11 and the ground plane as the origin, the X-axis is perpendicular to and intersects the first side line and the third side line of the connection surface, the Y-axis is perpendicular to and intersects the second side line and the fourth side line of the connection surface, and the axis perpendicular to both the X-axis and the Y-axis is the Z-axis.

According to an embodiment of the present invention, in step S103, a plurality of first distance data and second distance data are acquired at a plurality of set positions on four sides of the steel structure pillar 11.

According to the embodiment of the invention, the four sides of the steel structure pillar 11 are respectively provided with a deformation monitoring device, a plurality of first distance data between the first laser distance meters 14 and the sides can be obtained through a plurality of first laser distance meters 14 in the deformation monitoring device, and a second distance data between the second laser distance meters 15 and the ground can be obtained through a second laser distance meter 15 in the deformation monitoring device. And, each side surface of the steel structure pillar 11 has a plurality of set positions for connection with the suction means of the deformation measuring device, so that a plurality of first distance data and one second distance data are available at each set position.

According to an embodiment of the present invention, in step S104, a surface coordinate position in the three-dimensional coordinate system of a measurement position of the surface of the steel structure pillar 11 measured by each first laser range finder 14 at each set position of each side surface is determined based on the first distance data and the second distance data, including: determining a first position coordinate of each first laser rangefinder 14 in the three-dimensional coordinate system when measured at the j-th set position of the i-th side of the steel structure column 11, based on the plurality of first distance data measured at the j-th set position of the i-th side of the steel structure column 11, and the second distance data; and determining the surface coordinate position according to the first position coordinate.

According to an embodiment of the present invention, the first position coordinates may be determined in the three-dimensional coordinate system by a plurality of first distance data measured at the j-th set position of the i-th side of the steel structure pillar 11 and the second distance data, and the surface coordinate position may be determined by the first position coordinates and the plurality of first distance data and the second distance data, for example, the X-axis value of the surface coordinate position of the first side may be determined by a difference between the X-axis value of the first position coordinates and the first distance data, and the Y-axis and Z-axis values of the surface coordinate position of the first side may be equal to the Y-axis and Z-axis values of the first position coordinates.

According to an embodiment of the present invention, determining first position coordinates of each first laser rangefinder 14 in the three-dimensional coordinate system when measured at the j-th set position of the i-th side of the steel structure pillar 11 from the plurality of first distance data measured at the j-th set position of the i-th side of the steel structure pillar 11, and the second distance data, includes: if i=1, then a first position coordinate of the kth first laser rangefinder 14 in the three-dimensional coordinate system as measured at the jth set position of the ith side face of the steel structure pillar 11 is determined according to formula (1)，

（1）

If i=3, then a first position coordinate of the kth first laser rangefinder 14 in the three-dimensional coordinate system as measured at the jth set position of the ith side face of the steel structure pillar 11 is determined according to formula (2)，

（2）

Wherein,For the length of the connection face, n is the number of first laser rangefinders 14,For the first distance data measured by the kth first laser rangefinder 14 when measured at the jth set position of the ith side face of the steel structure pillar 11,For the first distance data measured by the kth +1 first laser rangefinder 14, measured at the jth set position of the ith side of the steel structure pillar 11, L is the length of the overhang bar 13,For the second distance data measured by the second laser rangefinder 15 when measured at the j-th set position of the i-th side of the steel structure pillar 11, k.ltoreq.n-1, and k and n are both positive integers.

Fig. 4 exemplarily shows a schematic view of a tilting condition of the steel structure pillar 11 according to an embodiment of the present invention.

According to an embodiment of the present invention, in formula (1),Representing the average distance between the plurality of first laser rangefinders 14 evenly arranged on the overhang bar 13,Then it is indicated that the kth first laser rangefinder 14 measures the distance to the trailing end of the boom 13, and thereforeIt may be indicated that the kth first laser rangefinder 14 measures the height to the ground, i.e. the Z-axis parameter. If i=1, the Y-axis parameter of the kth first laser rangefinder 14 in the three-dimensional coordinate system is 0. When the X-axis parameters are solved, as shown in FIG. 4, the steel structure column 11 is deformed obliquely, and the distance data A (length is) The two triangles are determined to be similar triangles, and the formula can be determined by taking the distance between the kth first laser rangefinder 14 and the kth+1th first laser rangefinder 14 as the triangle of the side length of the other right angle side, taking the distance data B as the side length of the one right angle side, and taking the distance data between the kth first laser rangefinder 14 and the bottom of the steel structure support 11 as the triangle of the side length of the other right angle sideThus, it is possible to obtainTherefore, the X-axis parameter of the kth first laser rangefinder 14 should beWherein, the method comprises the steps of, wherein,The distance from the centroid of the steel structural strut 11 to the first side is shown,Representing the difference between the first distance data determined by the kth laser rangefinder and the distance data B,The average value of the X-axis parameters representing the position coordinates of the respective first laser rangefinder 14, in this way, can be reduced in error and, therefore,Representing the X-axis parameters of the first laser rangefinder 14. If i=3, i.e. the first position coordinate of the kth first laser rangefinder 14 in the three-dimensional coordinate system as measured at the jth set position of the third side of the steel structural brace 11 is determined, in equation (2)AndThe meaning of (c) is the same as above and will not be described in detail, when the third side of the steel structural pillar 11 determines the first position coordinate, the X-axis parameter is negative, and thus, by a similar method, the X-axis parameter can be determined as。

According to an embodiment of the invention, determining the surface coordinate position from the first position coordinates comprises: if i=1, then according to formula (3), it is determined that the measurement position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 is the surface coordinate position in the three-dimensional coordinate system when measured at the jth set position of the ith side surface of the steel structure pillar 11，

（3）

If i=3, then according to formula (4), it is determined that the measurement position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 is the surface coordinate position in the three-dimensional coordinate system when measured at the jth set position of the ith side surface of the steel structure pillar 11。

（4）

According to an embodiment of the present invention, if i=1, according to formula (3), the surface coordinate position in the three-dimensional coordinate system of the measurement position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 when measured at the jth set position of the first side surface of the steel structure pillar 11 is determined, wherein,The X-axis parameter representing the position of the surface coordinates is the difference between the X-axis parameter of the first position coordinates of the kth first laser rangefinder 14 and the first distance data determined by the kth first laser rangefinder 14,AndThe Y-axis coordinate parameter and the Z-axis coordinate parameter representing the surface coordinate position are the same as the Y-axis parameter and the Z-axis parameter of the first position coordinate of the kth first laser rangefinder 14, respectively. If i=3, it is determined according to formula (4) that the X-axis parameter of the surface coordinate position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 in the three-dimensional coordinate system is negative when measured at the jth set position of the third side of the steel structure pillar 11, and thus, the X-axis parameter of the surface coordinate position can be determined from the sum of the X-axis parameter of the first position coordinate of the kth first laser rangefinder 14 and the first distance data determined by the kth first laser rangefinder 14,AndThe meaning of (c) is the same as above and will not be described in detail herein.

According to an embodiment of the present invention, determining first position coordinates of each first laser rangefinder 14 in the three-dimensional coordinate system when measured at the j-th set position of the i-th side of the steel structure pillar 11 from the plurality of first distance data measured at the j-th set position of the i-th side of the steel structure pillar 11, and the second distance data, includes: if i=2, then a first position coordinate of the kth first laser rangefinder 14 in the three-dimensional coordinate system as measured at the jth set position of the ith side face of the steel structure pillar 11 is determined according to formula (5)Wherein w is the width of the connecting surface;

（5）

if i=4, then according to equation (6), a first position coordinate of the kth first laser rangefinder 14 in the three-dimensional coordinate system as measured at the jth set position of the ith side of the steel structure pillar 11 is determined 。

（6）

According to the embodiment of the present invention, when the steel structural stay 11 is inclined in the Y-axis direction, the first position coordinates of the kth first laser rangefinder 14 in the three-dimensional coordinate system can be determined according to formula (5), wherein,Meaning similar to the above, and therefore, if i=2,Y-axis parameters representing the position coordinates of the first laser rangefinder 14. If i=4, then. In addition, when i=2 or i=4, the X-axis parameter of the position coordinate of the first laser rangefinder 14 is 0, and the z-axis parameter is the same as that when i=1 or i=3, and will not be described here again.

According to an embodiment of the present invention, determining the deformation condition of the steel structure pillar 11 according to the surface coordinate position includes: if i=2, then according to formula (7), it is determined that the measurement position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 is the surface coordinate position in the three-dimensional coordinate system when measured at the jth set position of the ith side surface of the steel structure pillar 11，

（7）

If i=4, then according to formula (8), it is determined that the measurement position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 is the surface coordinate position in the three-dimensional coordinate system when measured at the jth set position of the ith side surface of the steel structure pillar 11，

（8）

According to an embodiment of the present invention, if i=2, the surface coordinate position in the three-dimensional coordinate system of the measurement position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 when measured at the jth set position of the second side surface of the steel structure pillar 11 is determined according to formula (7), wherein,The Y-axis parameter representing the surface coordinate position of the second side is the difference between the Y-axis parameter of the first position coordinate of the kth first laser rangefinder 14 and the first distance data determined by the kth first laser rangefinder 14,AndThe X-axis coordinate parameter and the Z-axis coordinate parameter representing the surface coordinate position are the same as the X-axis parameter and the Z-axis parameter of the first position coordinate of the kth first laser rangefinder 14. If i=4, it is determined according to formula (8) that the Y-axis parameter of the surface coordinate position of the surface of the steel structure pillar 11 measured by the kth first laser rangefinder 14 in the three-dimensional coordinate system is negative when measured at the jth set position of the fourth side of the steel structure pillar 11, and thus, the Y-axis parameter may be determined by the sum of the Y-axis parameter of the surface coordinate position being the first position coordinate of the kth first laser rangefinder 14 and the first distance data determined by the kth first laser rangefinder 14,AndThe meaning of (c) is the same as above and will not be described in detail herein.

By the mode, the deformation measuring devices can be arranged on each side face of the steel structure support, the centroid of the connection face of the steel structure support and the ground plane is taken as an origin, a three-dimensional coordinate system is established, the first position coordinates of each first laser range finder on each side face in the three-dimensional coordinate system and the surface coordinate positions of the steel structure support can be determined according to the first distance data and the second distance data, therefore the deformation condition of the steel structure support can be monitored, the change of the surface coordinate positions can be captured timely, errors for judging the deformation condition are reduced, an accurate data basis is provided for judging the deformation condition of the steel structure support, and the timeliness and the accuracy of monitoring are improved.

According to an embodiment of the present invention, in step S105, determining a deformation condition of the steel structure strut 11 according to the surface coordinate position includes: determining a maximum inclination angle of the steel structure column 11 according to the surface coordinate position; determining a maximum bending angle of the steel structure strut 11 according to a plurality of surface coordinate positions on the same side of the steel structure strut 11; the maximum inclination angle and the maximum bending angle are weighted and summed, and the deformation condition score of the steel structure strut 11 is determined; and determining the deformation condition of the steel structure support 11 according to the deformation condition score.

According to the embodiment of the present invention, the maximum inclination angle of the steel structural stay 11 can be determined according to the surface coordinate position, and thus the inclination degree of the steel structural stay 11 can be judged. Whether the steel structure support 11 is deformed such as bent or not can be judged according to the plurality of surface coordinate positions on the same side face of the steel structure support 11, so that the deformation condition score of the steel structure support 11 is determined, and the deformation condition of the steel structure support 11 is further determined.

According to an embodiment of the present invention, determining the maximum inclination angle of the steel structure pillar 11 according to the surface coordinate position includes: when i=1 or i=3, the inclination angle of the i-th side face of the steel structure pillar 11 is determined according to formula (9)，

（9）

Wherein, when i=2 or i=4, the inclination angle of the i-th side face of the steel structure pillar 11 is determined according to the formula (10)，

（10）

Wherein,When measured at the m-th set position of the i-th side face of the steel structure pillar 11, the measured position of the surface of the steel structure pillar 11 measured by the n-th first laser range finder 14 is a surface coordinate position in the three-dimensional coordinate system,When measured at the 1 st set position of the i-th side surface of the steel structure pillar 11, the 1 st first laser rangefinder 14 measures the surface coordinate position of the surface of the steel structure pillar 11 in the three-dimensional coordinate system, wherein m is the number of set positions of each side surface, n is the number of first laser rangefinder 14, and m and n are both positive integers; the maximum value among the inclination angles of the four sides is determined as the maximum inclination angle of the steel structure pillar 11.

According to an embodiment of the present invention, when i=1 or i=3,Representing the difference between the X-axis parameter of the surface coordinate position of the steel structure column 11 measured by the first laser rangefinder 14 closest to the tip of the suspension bar 13 when measured at the highest set position and the X-axis value of the surface coordinate position of the steel structure column 11 measured by the first laser rangefinder 14 closest to the tail end of the suspension bar 13 when measured at the lowest set position, may represent the maximum lateral distance of the plurality of surface coordinate positions,Indicating the difference between the Z-axis parameter of the surface coordinate position of the steel structure column 11 measured by the first laser rangefinder 14 closest to the tip of the suspension bar 13 when measured at the highest set position and the Z-axis parameter of the surface coordinate position of the steel structure column 11 measured by the first laser rangefinder 14 closest to the tail end of the suspension bar 13 when measured at the lowest set position, indicating the maximum height difference of the plurality of surface coordinate positions,The tangent value of the inclination angle of the steel structural stay 11 toward the i-th side can be expressed,The angle of inclination of the i-th side of the steel structural stay 11 is shown. Similarly, when i=2 or i=4,Representing the difference between the Y-axis parameter of the surface coordinate position of the steel structure column 11 measured by the first laser rangefinder 14 closest to the tip of the suspension bar 13 when measured at the highest set position and the Y-axis value of the surface coordinate position of the steel structure column 11 measured by the first laser rangefinder 14 closest to the tail end of the suspension bar 13 when measured at the lowest set position, may represent the maximum lateral distance of the plurality of surface coordinate positions,The meaning is the same as that of the above, and is not repeated here, and similarly,The i-th side inclination angle of the steel structure pillar 11 is shown, and the maximum value of the inclination angles of the four sides of the steel structure pillar 11 is the maximum inclination angle of the steel structure pillar 11.

According to an embodiment of the present invention, determining the maximum bending angle of the steel structural strut 11 from a plurality of surface coordinate positions on the same side of the steel structural strut 11 includes: determining a surface vector between adjacent surface coordinate positions on the same side of the steel structure strut 11 according to a plurality of surface coordinate positions on the same side, wherein each side comprises m set positions, the number of the first laser rangefinder 14 is n, the number of the surface coordinate positions on each side is m×n, and m and n are positive integers; determining the maximum bending angle of the steel structure column 11 according to the formula (11)，

（11）

Wherein,Is the surface vector between the t-th surface coordinate position and the t + 1-th surface coordinate position on the i-th side,And a surface vector between the (t+1) th surface coordinate position and the (t+2) th surface coordinate position on the ith side surface, wherein t is less than or equal to m multiplied by n-2, and t is a positive integer.

In accordance with embodiments of the present invention, on the same side, two adjacent surface coordinate locations may define a surface vector,A cosine value representing the angle between two adjacent surface vectors, and therefore,For the angle between two adjacent surface vectors, since each side includes m set positions, the number of first laser rangefinders 14 is n, and the number of surface vectors between adjacent surface coordinate positions isThe number of included angles between adjacent surface vectors isAnd max is a function that takes the maximum value, and therefore,The maximum value of the angles between the adjacent surface vectors of the four sides is shown as the maximum bending angle, that is, the maximum angle at which the steel structure pillar 11 is bent.

According to an embodiment of the present invention, the maximum inclination angle and the maximum bending angle may be weighted and summed to determine a deformation condition score of the steel structural strut 11, thereby determining the deformation condition of the steel structural strut 11. The larger the deformation condition score, the more serious the deformation condition of the steel structure strut 11. In an example, one canAs a weight of the maximum inclination angle, wherein,Is the upper limit of the preset inclination angle and willAs a weight of the maximum bending angle, wherein,And when the deformation condition score is greater than or equal to 1, the deformation condition of the steel structure support 11 is serious, warning information can be generated to remind a worker of attention, otherwise, the deformation condition of the steel structure support 11 is not serious, and the steel structure support 11 can be temporarily not processed.

In this way, when the steel structural strut is inclined, the inclination angles of the steel structural strut to the four sides can be determined, and when the structural strut is bent, the surface vectors between the adjacent surface coordinate positions can be determined according to the plurality of surface coordinate positions on the same side, the included angle between the adjacent surface vectors can be further determined, and the maximum value of the included angle between the plurality of adjacent surface vectors in the four sides can be further determined as the maximum bending angle. Furthermore, the maximum inclination angle and the maximum bending angle can be weighted and summed, and then the deformation condition score is determined, so that the deformation condition score can objectively and accurately reflect the deformation degree of the steel structure support in the aspects of inclination and bending, a data basis is provided for overhauling the steel structure support, and the accuracy of monitoring the deformation of the steel structure is improved.

According to the steel structure deformation monitoring method provided by the embodiment of the invention, the deformation measuring device can be arranged at the preset positions of each side face of the steel structure support, the centroid of the connection face of the steel structure support and the ground plane is taken as the original point, a three-dimensional coordinate system is established, and then a plurality of first distance data and second distance data are acquired at a plurality of set positions of four side faces of the steel structure support, so that the surface coordinate positions of the measured positions of the surfaces of the steel structure support, measured by each first laser range finder, in the three-dimensional coordinate system are determined at each set position of each side face, and the deformation condition of the steel structure support is further determined. Therefore, through the surface coordinate position of the steel structure support in the three-dimensional coordinate system, whether the steel structure support is inclined or bent or not is observed in real time, the steel structure deformation monitoring efficiency is improved, and the probability of accidents is reduced. When the surface position coordinates are determined, deformation measuring devices can be arranged on each side face of the steel structure support column, the centroid of the connection face of the steel structure support column and the ground plane is taken as an origin, a three-dimensional coordinate system is established, the first position coordinates of each first laser range finder on each side face in the three-dimensional coordinate system and the surface coordinate positions of the steel structure support column can be determined according to the first distance data and the second distance data, therefore deformation conditions of the steel structure support column can be monitored, changes of the surface coordinate positions can be captured in time, errors for judging the deformation conditions are reduced, an accurate data base is provided for judging the deformation conditions of the steel structure support column, and monitoring timeliness and accuracy are improved. When the deformation condition score is determined, when the steel structure strut is inclined, the inclination angles of the steel structure strut to the four sides can be determined, when the structure strut is bent, the surface vectors between the adjacent surface coordinate positions can be determined according to the plurality of surface coordinate positions on the same side, the included angle between the adjacent surface vectors can be further determined, and the maximum value of the included angle between the plurality of adjacent surface vectors in the four sides can be further determined as the maximum bending angle. Furthermore, the maximum inclination angle and the maximum bending angle can be weighted and summed, and then the deformation condition score is determined, so that the deformation condition score can objectively and accurately reflect the deformation degree of the steel structure support in the aspects of inclination and bending, a data basis is provided for overhauling the steel structure support, and the accuracy of monitoring the deformation of the steel structure is improved.

FIG. 5 schematically illustrates a steel structure deformation monitoring system according to an embodiment of the present invention, the system comprising: the deformation measuring device is arranged at a j-th set position of an i-th side surface of the steel structure support 11, and comprises a connecting rod 12, a hanging rod 13, a plurality of first laser distance meters 14 and a second laser distance meter 15, wherein one end of the connecting rod 12 is provided with an adsorption device for adsorbing the connecting rod 12 on the surface of the steel structure support 11, the axial direction of the connecting rod 12 is perpendicular to the surface of the steel structure support 11, the other end of the connecting rod 12 is connected with the upper end of the hanging rod 13, the hanging rod 13 is in a hanging state, the axial direction of the hanging rod 13 is perpendicular to a ground plane, the axial direction of the hanging rod 13 is uniformly provided with a plurality of first laser distance meters 14, the direction of laser emitted by the first laser distance meters 14 is perpendicular to the axial direction of the hanging rod 13, the first laser distance meters 14 are used for measuring first distance data between the first laser distance meters 14 and the surface of the steel structure support 11, the second laser distance meters 15 are positioned at the lower end of the hanging rod 13 and used for measuring second distance data between the first laser distance meters 14 and the surface of the steel structure support 11, j and j is equal to or less than or equal to positive integer j and equal to or less than or equal to j is equal to or greater than or equal to j-25; the three-dimensional coordinate system building module is used for building a three-dimensional coordinate system by taking the centroid of the connection surface of the steel structure support 11 and the ground plane as an origin, wherein an XOY plane of the three-dimensional coordinate system is the ground plane, an X axis of the three-dimensional coordinate system is perpendicular to a first side line and a third side line of the connection surface, a Y axis of the three-dimensional coordinate system is perpendicular to a second side line and a fourth side line of the connection surface, the first side line of the connection surface is an intersection line of the first side surface of the steel structure support 11 and the ground plane, the second side line of the connection surface is an intersection line of the second side surface of the steel structure support 11 and the ground plane, the third side line of the connection surface is an intersection line of the third side surface of the steel structure support 11 and the ground plane, and the fourth side line of the connection surface is an intersection line of the fourth side surface of the steel structure support 11 and the ground plane, and the Z axis of the three-dimensional coordinate system is perpendicular to the ground plane; a distance data acquisition module that acquires a plurality of first distance data and second distance data at a plurality of set positions on four sides of the steel structure pillar 11; a surface coordinate position determining module that determines, based on the first distance data and the second distance data, a surface coordinate position in the three-dimensional coordinate system of a measurement position of the surface of the steel structure pillar 11 measured by each first laser range finder 14 at each set position of each side surface; and the deformation condition determining module is used for determining the deformation condition of the steel structure support 11 according to the surface coordinate position.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims (9)

1. A method for monitoring deformation of a steel structure, comprising: a deformation measuring device is arranged at a j-th set position of an i-th side surface of a steel structure support column, wherein the deformation measuring device comprises a connecting rod, a hanging rod, a plurality of first laser rangefinders and a second laser rangefinder, one end of the connecting rod is provided with an adsorption device for adsorbing the connecting rod on the surface of the steel structure support column, the axial direction of the connecting rod is perpendicular to the surface of the steel structure support column, the other end of the connecting rod is connected with the upper end of the hanging rod, the hanging rod is in a hanging state, the axial direction of the hanging rod is perpendicular to a ground plane, the hanging rod is axially and uniformly provided with the plurality of first laser rangefinders, the direction of laser emitted by the first laser rangefinder is perpendicular to the axial direction of the hanging rod and is used for measuring first distance data between the first laser rangefinder and the surface of the steel structure support column, the second laser rangefinder is positioned at the lower end of the hanging rod and is used for measuring second distance data between the second laser rangefinder and the ground plane, i 4,j is more than or equal to 1, and j is a positive integer; establishing a three-dimensional coordinate system by taking the centroid of the connection surface of the steel structure support column and the ground plane as an origin, wherein the XOY plane of the three-dimensional coordinate system is the ground plane, the X axis of the three-dimensional coordinate system is perpendicular to a first side line and a third side line of the connection surface, the Y axis of the three-dimensional coordinate system is perpendicular to a second side line and a fourth side line of the connection surface, the first side line of the connection surface is the intersection line of the first side surface of the steel structure support column and the ground plane, the second side line of the connection surface is the intersection line of the second side surface of the steel structure support column and the ground plane, the third side line of the connection surface is the intersection line of the third side surface of the steel structure support column and the ground plane, and the fourth side line of the connection surface is the intersection line of the fourth side surface of the steel structure support column and the ground plane, and the Z axis of the three-dimensional coordinate system is perpendicular to the ground plane; acquiring a plurality of first distance data and second distance data at a plurality of set positions of four sides of the steel structure strut; determining surface coordinate positions of the measurement positions of the surfaces of the steel structure struts measured by the first laser range finders in the three-dimensional coordinate system at all set positions of all sides according to the first distance data and the second distance data; determining the deformation condition of the steel structure support according to the surface coordinate position;

Determining a deformation condition of the steel structure strut according to the surface coordinate position, including: determining the maximum inclination angle of the steel structure support according to the surface coordinate position; determining a maximum bending angle of the steel structure support according to a plurality of surface coordinate positions on the same side surface of the steel structure support; carrying out weighted summation on the maximum inclination angle and the maximum bending angle, and determining a deformation condition score of the steel structure support column; and determining the deformation condition of the steel structure support according to the deformation condition score.

2. The steel structure deformation monitoring method according to claim 1, wherein determining, from the first distance data and the second distance data, a surface coordinate position in the three-dimensional coordinate system of a measurement position of a surface of the steel structure pillar measured by each first laser rangefinder at each set position of each side surface comprises: determining a first position coordinate of each first laser rangefinder in the three-dimensional coordinate system when measured at the j-th set position of the i-th side of the steel structure pillar based on the plurality of first distance data measured at the j-th set position of the i-th side of the steel structure pillar and the second distance data; and determining the surface coordinate position according to the first position coordinate.

3. The method of claim 2, wherein determining the first position coordinates of each first laser rangefinder in the three-dimensional coordinate system as measured at the j-th set position of the i-th side of the steel structural brace from the plurality of first distance data measured at the j-th set position of the i-th side of the steel structural brace and the second distance data comprises: if i=1, then according to the formulaDetermining a first position coordinate of a kth first laser rangefinder in the three-dimensional coordinate system as measured at a jth set position of an ith side of the steel structural braceIf i=3, then according to the formulaDetermining a first position coordinate of a kth first laser rangefinder in the three-dimensional coordinate system as measured at a jth set position of an ith side of the steel structural braceWherein, the method comprises the steps of, wherein,For the length of the connection surface, n is the number of first laser rangefinders,For the first distance data measured by the kth first laser rangefinder when measured at the jth set position of the ith side of the steel structure pillar,For the first distance data measured by the (k+1) th first laser rangefinder when measured at the (j) th set position of the (i) th side of the steel structure pillar, L is the length of the suspension rod,And in order to measure the second distance data measured by the second laser distance measuring instrument at the j-th set position of the i-th side surface of the steel structure support column, k is less than or equal to n-1, and k and n are positive integers.

4. A method of monitoring deformation of a steel structure according to claim 3, wherein determining the surface coordinate location from the first location coordinates comprises: if i=1, then according to the formulaDetermining a surface coordinate position in the three-dimensional coordinate system of a measurement position of a surface of the steel structure pillar measured by a kth first laser rangefinder as measured at a jth set position of an ith side of the steel structure pillar; If i=3, then according to the formulaDetermining a surface coordinate position in the three-dimensional coordinate system of a measurement position of a surface of the steel structure pillar measured by a kth first laser rangefinder as measured at a jth set position of an ith side of the steel structure pillar。

5. A steel structure deformation monitoring method according to claim 3, wherein determining first position coordinates of each first laser rangefinder in the three-dimensional coordinate system as measured at the j-th set position of the i-th side of the steel structure column based on the plurality of first distance data measured at the j-th set position of the i-th side of the steel structure column and the second distance data comprises: if i=2, then according to the formulaDetermining a first position coordinate of a kth first laser rangefinder in the three-dimensional coordinate system as measured at a jth set position of an ith side of the steel structural braceWherein w is the width of the connecting surface; if i=4, then according to the formulaDetermining a first position coordinate of a kth first laser rangefinder in the three-dimensional coordinate system as measured at a jth set position of an ith side of the steel structural brace。

6. The method of claim 5, wherein determining the deformation condition of the steel structure strut based on the surface coordinate position comprises: if i=2, then according to the formulaDetermining a surface coordinate position in the three-dimensional coordinate system of a measurement position of a surface of the steel structure pillar measured by a kth first laser rangefinder as measured at a jth set position of an ith side of the steel structure pillar; If i=4, then according to the formulaDetermining a surface coordinate position in the three-dimensional coordinate system of a measurement position of a surface of the steel structure pillar measured by a kth first laser rangefinder as measured at a jth set position of an ith side of the steel structure pillar。

7. The method of claim 1, wherein determining a maximum tilt angle of the steel structure strut based on the surface coordinate location comprises: when i=1 or i=3, the formula is followedDetermining the angle of inclination of the ith side of a steel structural strut; When i=2 or i=4, the formula is followedDetermining the angle of inclination of the ith side of a steel structural strutWherein, the method comprises the steps of, wherein,When the measurement is performed at the m-th set position of the i-th side surface of the steel structure pillar, the measurement position of the surface of the steel structure pillar measured by the n-th first laser range finder is the surface coordinate position in the three-dimensional coordinate system,When the measurement is performed at the 1 st set position of the i-th side surface of the steel structure support column, the surface coordinate position of the surface of the steel structure support column measured by the 1 st first laser distance meter in the three-dimensional coordinate system is measured, wherein m is the number of set positions of each side surface, n is the number of first laser distance meters, and m and n are positive integers; the maximum of the inclination angles of the four sides is determined as the maximum inclination angle of the steel structure pillar.

8. The method of claim 1, wherein determining the maximum bending angle of the steel structural brace based on the plurality of surface coordinate locations on the same side of the steel structural brace comprises: determining surface vectors between adjacent surface coordinate positions on the same side of the steel structure support according to a plurality of surface coordinate positions on the same side, wherein each side comprises m set positions, the number of the first laser range finders is n, the number of the surface coordinate positions on each side is m×n, and m and n are positive integers; according to the formulaDetermining the maximum bending angle of a steel structure strutWherein, the method comprises the steps of, wherein,Is the surface vector between the t-th surface coordinate position and the t + 1-th surface coordinate position on the i-th side,And a surface vector between the (t+1) th surface coordinate position and the (t+2) th surface coordinate position on the ith side surface, wherein t is less than or equal to m multiplied by n-2, and t is a positive integer.

9. A steel structure deformation monitoring system for performing the method of any one of claims 1-8, comprising: the deformation measuring device is arranged at a j-th set position of an i-th side surface of the steel structure support, and comprises a connecting rod, a hanging rod, a plurality of first laser rangefinders and a second laser rangefinder, wherein one end of the connecting rod is provided with an adsorption device for adsorbing the connecting rod on the surface of the steel structure support, enabling the axial direction of the connecting rod to be perpendicular to the surface of the steel structure support, the other end of the connecting rod is connected with the upper end of the hanging rod, enabling the hanging rod to be in a hanging state, enabling the axial direction of the hanging rod to be perpendicular to a ground plane, the axial direction of the hanging rod is uniformly provided with the plurality of first laser rangefinders, the direction of laser emitted by the first laser rangefinder is perpendicular to the axial direction of the hanging rod, the first laser rangefinder is used for measuring first distance data between the first laser rangefinder and the surface of the steel structure support, the second laser rangefinder is located at the lower end of the hanging rod and is used for measuring second distance data between the second laser rangefinder and the ground plane, and i is equal to or more than 1 and 4,j and is equal to or less than or equal to positive integer j; the three-dimensional coordinate system building module is used for building a three-dimensional coordinate system by taking the centroid of the connection surface of the steel structure support column and the ground plane as an origin, wherein an XOY plane of the three-dimensional coordinate system is the ground plane, an X axis of the three-dimensional coordinate system is perpendicular to a first side line and a third side line of the connection surface, a Y axis of the three-dimensional coordinate system is perpendicular to a second side line and a fourth side line of the connection surface, the first side line of the connection surface is an intersection line of a first side surface of the steel structure support column and the ground plane, the second side line of the connection surface is an intersection line of a second side surface of the steel structure support column and the ground plane, the third side line of the connection surface is an intersection line of a third side surface of the steel structure support column and the ground plane, and the fourth side line of the connection surface is an intersection line of a fourth side surface of the steel structure support column and the ground plane, and the Z axis of the three-dimensional coordinate system is perpendicular to the ground plane; the distance data acquisition module is used for acquiring a plurality of first distance data and second distance data at a plurality of set positions of four sides of the steel structure support column; a surface coordinate position determining module for determining a surface coordinate position of a measurement position of the surface of the steel structure pillar measured by each first laser range finder in the three-dimensional coordinate system at each set position of each side surface according to the first distance data and the second distance data; and the deformation condition determining module is used for determining the deformation condition of the steel structure support column according to the surface coordinate position.