CN111982656A - Engineering structure model test system under environment load coupling effect - Google Patents
Engineering structure model test system under environment load coupling effect Download PDFInfo
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- CN111982656A CN111982656A CN202010706703.1A CN202010706703A CN111982656A CN 111982656 A CN111982656 A CN 111982656A CN 202010706703 A CN202010706703 A CN 202010706703A CN 111982656 A CN111982656 A CN 111982656A
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Abstract
The invention relates to an engineering structure model test system under the environment load coupling effect, which comprises: the environment simulation box comprises an environment simulation box and a loading assembly. The environment simulation box is used for placing an engineering structure for simulation test and providing preset environment conditions for the engineering structure. When the engineering structure is tested, the engineering structure is placed in the environment simulation box, the environment simulation box provides preset environment conditions for the engineering structure, different natural environment factors are reproduced, meanwhile, vertical and horizontal multidirectional loading is synchronously performed by the loading assembly, the loading assembly transmits simulated external loads to the engineering structure, namely, the influence of mutual coupling of the different natural environment factors and the external loads on static force and dynamic response of the engineering structure can be considered simultaneously, the simulation test is more real, and the experimental research on the structural performance evolution law, the disaster-causing mechanism and the like of the engineering structure under the environment load coupling effect can be realized.
Description
Technical Field
The invention relates to the technical field of engineering structure model test systems, in particular to an engineering structure model test system under the environment load coupling effect.
Background
In recent years, civil engineering infrastructure in China makes great progress in technical development and scale development, and multi-seat large-span bridge and tunnel engineering, such as a Ganku-Australia bridge just passing through a vehicle and a deep channel under construction, are built. The service environment of these major civil engineering structural facilities is complex and is affected by environmental factors such as temperature, humidity, chloride ion attack, etc., in addition to the vehicle load during normal operation. The existing engineering structure design mainly considers the structural performance under permanent load, variable load (such as vehicles) and accidental load (such as earthquake, typhoon and the like) or mainly considers the structural durability of environmental factors, and less considers environmental multifactor and load coupling effect.
Disclosure of Invention
Based on the above, it is necessary to overcome the defects of the existing indoor test technology, and provide an engineering structure model test system under the environment load coupling effect, which can realize the experimental research on the structure performance evolution law, the disaster mechanism and the like under the environment load coupling effect of the engineering structure.
The technical scheme is as follows: the utility model provides an engineering structure model test system under environmental load coupling effect, engineering structure model test system includes under the environmental load coupling effect: the environment simulation box is used for placing an engineering structure for simulation test and providing preset environment conditions for the engineering structure; the loading subassembly, the loading subassembly includes a plurality of actuator, the actuator be used for with engineering structure links to each other, transmits simulation external load for engineering structure.
According to the engineering structure model test system under the environment load coupling effect, when the engineering structure is tested, the engineering structure is placed in the environment simulation box, the environment simulation box provides preset environment conditions for the engineering structure, different natural environment factors (including but not limited to temperature, humidity, rainwater, chloride ion corrosion, illumination, carbonization and salt spray corrosion) are reproduced, meanwhile, the loading assembly synchronously performs loading action, the loading assembly transmits the simulated external moving load to the engineering structure, namely the influence of the mutual coupling of the different natural environment factors and the external moving load on the structural performance and the disaster-causing mechanism of the engineering structure can be considered simultaneously, the simulation test is more real, and the test research on the structural performance rule, the disaster-causing mechanism and the like of the engineering structure under the environment load coupling effect can be realized.
In one embodiment, the bottom plate of the environmental simulation tank is an openable bottom plate.
In one embodiment, the engineering structure model test system under the environment load coupling effect further comprises a seismic simulation vibrating table, and the seismic simulation vibrating table is connected with the environment simulation box and used for transmitting the vibration load to the engineering structure in the environment simulation box.
In one embodiment, at least one door plate is arranged inside the environment simulation box, and the at least one door plate divides the inner space of the environment simulation box into at least two test environment spaces.
In one embodiment, the door panel is openably disposed in the environmental simulation cabinet.
In one embodiment, the engineering structure model test system under the coupling action of the environmental load further comprises a support plate arranged below the environmental simulation box, the environmental simulation box is movably arranged on the support plate, and the door plate is arranged in the environmental simulation box in an openable mode.
In one embodiment, the engineering structure model test system under the coupling action of the environmental load further comprises an excitation trolley, and the excitation trolley can move into the environment simulation box.
In one embodiment, the number of the excitation trolleys is two; the excitation trolley comprises a trolley body, wheels arranged on the trolley body, a frequency modulation motor for driving the wheels to rotate, an inertial navigation guide frame for guiding the movement path of the trolley body, and an adjustable weight block arranged on the trolley body.
In one embodiment, the loading assembly further comprises more than two reaction frames which are arranged at intervals; the actuators comprise more than two vertical actuators and more than two horizontal actuators, the more than two vertical actuators are arranged on the cross beam of the reaction frame, and the more than two horizontal actuators are arranged on the more than two vertical beams of the reaction frame in a one-to-one correspondence manner; the top plate of the environment simulation box is provided with more than two first windows which are in one-to-one correspondence with the two reaction frames, and the vertical actuator penetrates through the first windows, extends into the environment simulation box and is used for being connected with the engineering structure to transmit a simulated vertical load to the engineering structure; and more than two second windows are arranged on a side plate of the environment simulation box, and the horizontal actuator penetrates through the second windows and extends into the environment simulation box to be connected with the engineering structure so as to transmit the simulated horizontal load to the engineering structure.
In one embodiment, the environment simulation box is provided with at least one of a temperature and humidity regulator, a rainfall simulator, an illumination simulator, a carbonization simulator and a salt spray simulator; the engineering structure model test system under the environment load coupling effect further comprises a sensing and collecting device for obtaining test information of the engineering structure; the sensing and collecting device comprises a plurality of high-definition cameras, a three-dimensional laser scanner, a fiber grating sensor, a hygrothermograph and a data collecting instrument.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a structural diagram of a structural model test system of a project under the coupling effect of environmental loads according to an embodiment of the present invention;
FIG. 2 is a cross-sectional structure diagram of a structural model testing system under the coupling effect of environmental loads according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view at A-A of FIG. 2;
FIG. 4 is an exploded view of a structural model testing system under the coupling effect of environmental loads according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an excitation trolley in a engineering structural model test system under the coupling effect of environmental loads according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a reaction frame acting on a single box girder structure through a vertical actuator in a engineering structure model test system under the coupling action of an environmental load according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a state of a continuous beam bridge test performed by the engineering structure model test system under the coupling of environmental loads according to an embodiment of the present invention;
fig. 8 is a sectional structural view at B-B of fig. 7.
10. A test section; 11. a groove; 20. an environmental simulation box; 21. a base plate; 22. a door panel; 23. a first slider; 24. a top plate; 241. a first window; 25. a side plate; 26. an end panel; 251. an observation window; 30. loading the component; 31. a vertical actuator; 32. a horizontal actuator; 33. a reaction frame; 331. erecting a beam; 332. a cross beam; 35. a distribution beam; 40. an engineering structure; 41. a base plate; 42. a mortar layer; 43. a track plate; 44. a steel rail; 50. a support plate; 51. a first slide rail; 60. exciting the trolley; 61. a vehicle body; 62. a wheel; 63. an adjustable weight block; 631. separating the bin; 64. an inertial navigation guide frame; 65. a frequency modulation motor; 80. a single box girder; 91. a strain gauge; 92. an accelerometer.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Conventionally, for indoor tests of structural performance of civil engineering, a single external load loading test or a durability test only considering environmental factors is generally considered, and a test system for researching the evolution rule of the structural performance of the engineering under the action of different multi-load (such as loads of vehicles, earthquakes, typhoons and the like) and environmental multi-factor coupling (such as factors of temperature, humidity, rainwater, chloride ion erosion, illumination, carbonization, disturbance of the surrounding environment and the like) is lacked. Based on the above, the application provides an engineering structure model test system under the environment load coupling effect, which overcomes the defect of functional singleness of the existing engineering structure performance indoor test room, accurately simulates the multi-factor coupling effect of external multi-load and environment through the indoor test, performs experimental research on the structural performance evolution rule and the like under the engineering structure multi-factor multi-load coupling effect, reveals the engineering structure disaster causing mechanism and provides effective disaster prevention and reduction measures, thereby comprehensively prolonging the service life and the safe operation and maintenance of civil engineering infrastructure in China.
Referring to fig. 1 to 3, fig. 1 is a schematic diagram illustrating a structure diagram of a model test system of a engineering structure 40 under the coupling effect of environmental loads according to an embodiment of the present invention; fig. 2 illustrates an end face structure diagram of a engineering structure 40 model test system under the coupling effect of environmental loads according to an embodiment of the present invention; fig. 3 illustrates a cross-sectional view at a-a of fig. 2. In an embodiment of the invention, a system for testing a model 40 of an engineering structure under an environment load coupling effect includes: an environmental simulation chamber 20 and a loading assembly 30. The environmental simulation box 20 is used for placing the engineering structure 40 for simulation test and providing preset environmental conditions for the engineering structure 40. The loading assembly 30 includes a plurality of actuators for coupling to the engineered structure 40 to transfer the simulated external load to the engineered structure 40.
When the engineering structure 40 model test system under the environment load coupling effect tests the engineering structure 40, the engineering structure 40 is placed in the environmental simulation chamber 20, the environmental simulation chamber 20 provides the engineering structure 40 with preset environmental conditions, reproduces different natural environmental factors (including but not limited to temperature, humidity, rainwater, light, carbonization, and salt spray), meanwhile, the loading component 30 synchronously performs loading action, the loading component 30 transmits the simulated external load (for example, simulated fatigue load) to the engineering structure 40, namely, the influence of mutual coupling of different natural environment factors and the external load on the structural performance and the disaster-causing mechanism of the engineering structure 40 can be considered at the same time, the simulation test is more real, and the experimental research on the structural performance evolution law, the disaster-causing mechanism and the like of the engineering structure 40 under the environment load coupling effect can be realized.
It should be noted that the engineering structure 40 in the present embodiment includes, but is not limited to, a house, a bridge, a tunnel, a road, or a track structure. The above-mentioned test system for the model of the engineering structure 40 under the environment load coupling generally performs synchronous test work on the same type of engineering structure 40, and certainly, may also perform synchronous test work on different types of engineering structures 40, and is not limited herein.
As an example, when the engineering structure is a high-rise building structure, the high-rise building structure is placed in an environment box, vertical and horizontal component forces of seismic load are simulated through loading of vertical and horizontal actuators, and a strain gauge and an acceleration sensor are installed on the high-rise building structure to obtain seismic response of the high-rise building structure under coupling action of different environmental factors and the seismic load.
Further, it should be noted that the foundation types in the present embodiment include, but are not limited to, a soft soil foundation, a loess foundation, an expansive soil foundation, and a frozen soil foundation. These foundations, which are placed in the recesses 11 of the test section 10 or in the environmental simulation chamber 20 for example, are tested and can be replaced when not needed.
It should be noted that the bridge in the present embodiment is a reduced-scale bridge model, and the form of the bridge includes, but is not limited to, a simply supported bridge, a continuous bridge, a rigid frame bridge, an arch bridge, a cable-stayed bridge, and a suspension bridge. These bridges may be placed inside the environmental simulation chamber 20 during testing, or may be replaced when not being tested by detaching the bottom plate 21 of the environmental simulation chamber 20 and placing it outside the environmental simulation chamber 20.
Further, the bottom plate 21 of the environmental simulation tank 20 is an openable bottom plate 21. Specifically, the bottom panel 21 of the environmental simulation chamber 20 may be a swing-open, a folding-open, or a detachable bottom panel 21, or the like. Of course, the bottom plate 21 of the environmental simulation chamber 20 may be integrally formed with the other side plate 25, and may not be opened.
In one of the simulation test scenarios, the engineering structure 40 is a track structure, a model test is performed on the track structure, the bottom plate 21 of the environmental simulation box 20 is not detached, of course, the bottom plate 21 of the environmental simulation box 20 can be detached when the internal space of the environmental simulation box 20 is insufficient, the track structure and the road bed, or the track structure and the bridge are placed inside the environmental simulation box 20 for a simulation test, during the simulation test, the environmental simulation box 20 provides preset environmental conditions for the engineering structure 40, different natural environmental factors (including but not limited to temperature field, rain erosion, light, carbonization, and salt spray corrosion) are reproduced, meanwhile, the loading assembly 30 synchronously performs loading actions on the track structure, the loading assembly 30 transmits the vertical load of the simulated vehicle to the engineering structure 40, the moving load of the vehicle is simulated through the time difference of the two vertical actuators 31, namely, the influence of the mutual coupling of different natural environment factors and the moving load of the vehicle on the structural performance of the track structure can be considered at the same time, the simulation test is more real, and the experimental research on the structural performance evolution rule, the disaster-causing mechanism and the like of the engineering structure 40 under the environment load coupling effect can be realized.
Similarly, in another simulation scenario, the engineering structure 40 is, for example, a bridge, a tunnel, a house, a road, and the model test is performed on the bridge, the tunnel, the house, and the road, and the bridge, the tunnel, the house, and the road are put into the environmental simulation box 20 for the test study.
Referring to fig. 1, fig. 2 and fig. 4, fig. 4 is an exploded schematic view of a model testing system of a engineering structure 40 under the coupling of environmental loads according to an embodiment of the present invention. In one embodiment, the system for testing the model of the structure 40 under the coupling effect of the environmental load further comprises a seismic modeling vibration table. The seismic simulation shaking table is connected to the environmental simulation chamber 20 for transferring the shaking load to the engineered structure 40 within the environmental simulation chamber 20. Thus, through the seismic simulation vibration table, the structural performance influence of the engineering structure 40 under the three-dimensional seismic action and the disturbance of the surrounding environment can be simulated. Specifically, the earthquake simulation vibration table is a three-direction six-degree-of-freedom earthquake simulation vibration table, and can input earthquake waves in different directions to simulate three-dimensional earthquake loads and simulate different surrounding vibration environments by loading expected waveforms, wherein the different surrounding vibration environments comprise parallel lines, intersections, upper crossing, lower crossing and the like. Alternatively, the seismic modeling vibration table may be a vibration table with other degrees of freedom, and is not limited herein. In addition, the number of seismic modeling vibration tables is not limited, and may be one, two, three, or another number. The installation position of the seismic simulation vibrating table is not limited, and the seismic simulation vibrating table may be installed inside the environment simulation box 20 or outside the environment simulation box 20. As an example, there are two seismic simulation vibration tables, and the two seismic simulation vibration tables are provided at intervals in a corresponding area below the environmental simulation chamber 20.
As an example, the system for testing the model of the engineering structure 40 under the coupling effect of the environmental load further comprises a test section 10. The test section 10 is provided with a groove 11, and the test section 10 is positioned below the environment simulation box 20. The seismic simulation shaking table is arranged in the groove 11.
Referring to fig. 1, 2 and 4, in one embodiment, two or more door panels 22 are sequentially spaced inside the environmental simulation chamber 20, and the two or more door panels 22 divide the internal space of the environmental simulation chamber 20 into a plurality of test environmental spaces. Therefore, the engineering structures 40 can be respectively placed in the test environment spaces in a one-to-one correspondence mode, the environmental conditions in the test environment spaces can be the same or different, and the independent simulation tests can be simultaneously and respectively carried out on the engineering structures 40. Of course, only one or two of the test environment spaces may be selected for the simulation test. Specifically, the number of the door panels 22 inside the environmental simulation chamber 20 is two, and the two door panels 22 partition the environmental simulation chamber 20 to form three test environmental spaces.
Referring to fig. 2 to 4, in one embodiment, the system for testing a model of a process structure 40 under coupled environmental loads further includes a support plate 50 disposed under the environmental chamber 20. The environmental simulation chamber 20 is movably disposed on the support plate 50, and the door panel 22 is openably disposed in the environmental simulation chamber 20. Thus, the test environment space where the engineering structure 40 is located can be changed by opening the door panel 22 and moving the environment simulation box 20, so that the environmental conditions of the engineering structure 40 can be correspondingly and rapidly changed, and the structural performance evolution law and the disaster-causing mechanism of the engineering structure 40 under the scene can be correspondingly observed and researched.
Referring to fig. 2 and 4, further, the system for testing the model of the engineering structure 40 under the coupling of the environmental load further includes a supporting plate 50 disposed below the environmental simulation chamber 20. The supporting plate 50 is provided with a first slide rail 51, and the environmental simulation box 20 is provided with a first sliding member 23 that moves along the first slide rail 51. The door panel 22 is an automatic door. The automatic door may be, for example, a foldable opening automatic door, a swing opening automatic door, or an automatic door that is opened in other ways. Taking the foldable opening automatic door as an example, the foldable opening automatic door correspondingly performs a folding opening action when receiving a door opening instruction, and correspondingly performs an unfolding door closing action when receiving a door closing instruction.
Specifically, the first slider 23 includes, but is not limited to, a slide block, a slide wheel, and the like. Further, the first slide rail 51 is provided along the extending direction of the groove 11. In addition, there are two first slide rails 51, and the two first slide rails 51 are arranged in parallel at an interval. The number of the first sliding members 23 is two, and the two first sliding members 23 are respectively and correspondingly movably disposed on the two first sliding rails 51, so that the environmental simulation box 20 can move on the supporting plate 50 more smoothly.
Further, the end panels 26 of the environmental chamber 20 are also openable automatic doors, and the excitation trolley 60 can enter the environmental chamber 20 for the relevant moving load test after the end panels 26 are opened.
Referring to fig. 1 and 3, in one embodiment, the loading assembly 30 further includes two or more reaction frames 33 spaced apart from each other, and an actuator connected to at least one reaction frame 33. The actuators include at least one vertical actuator 31 and at least one horizontal actuator 32, the at least one vertical actuator 31 is disposed on the at least one reaction frame 33 in a one-to-one correspondence, and the at least one horizontal actuator 32 is disposed on the at least one reaction frame 33 in a one-to-one correspondence. The top plate 24 of the environment simulation box 20 is provided with more than two first windows 241 corresponding to the two reaction frames 33 one by one, and the vertical actuator 31 penetrates through the first windows 241 and extends into the environment simulation box 20 to be connected with the engineering structure 40, so that the simulated external vertical load is transmitted to the engineering structure 40. The side plate 25 of the environment simulation box 20 is provided with more than two second windows, the horizontal actuators 32 penetrate through the second windows, extend into the environment simulation box 20 and are used for being connected with the engineering structure 40, and the horizontal actuators 32 are used for simulating external horizontal loads to be transmitted to the engineering structure 40. It is understood that more than two first windows 241 on the top plate 24 can be communicated with each other to form one window, and similarly, more than two second windows on the side plate 25 can be communicated with each other to form one window.
As an example, when the engineering structure 40 is a bridge structure, main beams and piers are placed inside the environment simulation box 20, vertical force and horizontal force of a seismic load are simulated through the vertical actuators 31 and the horizontal actuators 32, and strain response and acceleration response of the bridge structure under coupling action of different environmental factors and three-dimensional seismic loads are respectively obtained through installing strain gauges and acceleration sensors on the main beams and the piers.
Further, the number of the reaction frames 33 is not limited, but in the present embodiment, the number of the reaction frames 33 and the number of the horizontal actuators 32 are 2, for example. In addition, the number of the vertical actuators 31 is not limited, and is, for example, 8, 10 or other numbers in the present embodiment.
Referring to fig. 3 and 6, fig. 6 is a schematic structural diagram illustrating a single-track structure of the reaction frame 33 acting on a single box girder 80 through a vertical actuator 31 in the model test system of the engineering structure 40 under the coupling effect of the environmental load according to an embodiment of the present invention. The engineering structure 40 is, for example, a track structure, and specifically includes a base plate 41, a mortar layer 42, a track plate 43, and two rails 44 disposed on the track plate 43, which are sequentially stacked from bottom to top. Further, vertical actuator installs additional on the fastener of two rail of track structure through the distributive girder to realize three point bending test (every actuator is at the middle part loading of distributive girder, thereby two rail are connected at distributive girder both ends and the power of actuator is transmitted two rail through the distributive girder). In addition, the simulation of the moving load of the train can be realized by the phase difference loading of the plurality of vertical actuators 31. Further, the base plate 41, the mortar layer 42, and the rail plate 43 are provided with a strain gauge 91 and an accelerometer 92. The setting positions and the number of the strain gauges 91 in the base plate 41, the mortar layer 42 and the track plate 43 are not limited, the strain gauges 91 can correspondingly acquire the stress strain in the base plate 41, the mortar layer 42 and the track plate 43, and the influence of different natural environment factors and external moving load on the internal force of the track structure is correspondingly judged. Acceleration data of the base plate 41, the mortar layer 42 and the track plate 43 can be correspondingly acquired through the accelerometer 92, structural energy of the base plate 41, the mortar layer 42 and the track plate 43 can be obtained according to the acceleration data of the base plate 41, the mortar layer 42 and the track plate 43, and the influence of mutual coupling of different natural environment factors and external moving loads on the structural performance of the track structure can be correspondingly judged.
Specifically, the reaction frame 33 includes two vertical beams 331 and a cross beam 332 connecting the two vertical beams 331. The longitudinal beams 34 are connected to the middle of the cross beams 332, and the horizontal actuators 32 are provided on the vertical beams 331. The vertical actuator 31 is provided on the cross beam 332. Further, as an example, the horizontal actuator 32 is detachably provided on the vertical beam 331, so that the horizontal actuator 32 can be detached from the vertical beam 331 when the simulation of the horizontal load is not required.
Referring to fig. 1 and fig. 2, further, the side plate 25 of the environmental simulation chamber 20 is provided with observation windows 251, and the number of the observation windows 251 is not limited. Through the viewing window 251, the details of the engineered structure 40 within the environmental simulation chamber 20 can be observed.
Referring to fig. 1 and 5, fig. 5 is a schematic structural diagram of an excitation trolley 60 in a model test system of a engineering structure 40 under the coupling effect of an environmental load according to an embodiment of the present invention. In one embodiment, the system for testing the model of the structure 40 under the coupling of environmental loads further comprises an excitation trolley 60. The excitation trolley 60 is movable to the support plate 50 inside the environmental simulation chamber 20. In this way, the support plate 50 of the excitation trolley 60 can move from the outside of the environmental simulation chamber 20 to the inside of the environmental simulation chamber 20, and the influence of the train on the engineering structure 40 during operation can be simulated.
Referring to fig. 1 and 5, there are further two excitation trolleys 60. The excitation trolley 60 comprises a trolley body 61, wheels 62 arranged on the trolley body 61, a frequency modulation motor 65 for driving the wheels 62 to rotate, an inertial navigation guide frame 64 for guiding the moving path of the trolley body 61, and an adjustable weight 63 arranged on the trolley body 61.
Specifically, the frequency-adjustable motor can change the speed and frequency of the excitation trolley 60 by adjusting the frequency, the plurality of compartments 631 inside the adjustable weight 63 can be used to increase or decrease the mass, and the inertial navigation guide frame 64 is used to drive the path of the excitation trolley. In addition, the two excitation trolleys are mainly used for considering the influence on the engineering structure 40 when two vehicles on two lines run in the same direction or the reverse direction, the excitation trolleys are used for simulating moving vehicle loads, and the sizes, the speeds and the frequencies of different vehicle loads are changed by adjusting the rotating speeds and the frequencies of the adjustable weight blocks 63 and the frequency modulation motor 65 on the excitation trolleys.
In one embodiment, the environmental simulation chamber 20 is provided with at least one of a temperature and humidity regulator, a rainfall simulator, an illumination simulator, a carbonation simulator, and a salt spray simulator. The temperature and humidity change is regulated by a temperature and humidity regulation and display integrated control system (comprising a refrigerating system, a humidifying system, a heating system, an air supply system and a PID control system). The rainfall realizes different rainfall intensities and rainfall amounts through a plurality of nozzles; the illumination realizes different illumination intensities through illumination devices of a plurality of ultraviolet lamp tubes; the carbonization is realized by simulating the carbonization of concrete with different degrees by a quick test method of normal pressure and low concentration, and the main control parameters comprise CO2 concentration and carbonization time; the salt fog realizes different salt fog sedimentation amounts through a continuous tower type PP plate spraying and multiple salt fog test boxes.
In addition, further, the system for testing the model of the engineering structure 40 under the coupling effect of the environmental load further comprises a sensing and collecting device for acquiring the test information of the track structure. The sensing and collecting device comprises a plurality of high-definition cameras, a three-dimensional laser scanner, a fiber grating sensor and a data collecting instrument. The high-definition camera is used for remotely shooting the deformation of the whole structure of the engineering structure 40, the three-dimensional laser scanner obtains the three-dimensional coordinate data of the surface of the engineering structure 40 to obtain the structural deformation, and the structural deformation and the vibration characteristics of the whole three-dimensional structure under the coupling action of environmental multifactor and train load are analyzed through a machine vision algorithm. In addition, the fiber grating sensor is, for example, embedded in the engineering structure 40 to measure the strain, displacement and acceleration of the engineering structure 40, and the data acquisition instrument is used to acquire the strain, displacement and acceleration of the engineering structure 40 during the test.
Referring to fig. 7 and 8, fig. 7 is a schematic cross-sectional view illustrating a state of a continuous beam bridge test performed by a model test system of a engineering structure 40 under the coupling effect of environmental loads according to an embodiment of the present invention; fig. 8 illustrates a sectional structure view at B-B of fig. 7. The engineering structure 40 is, for example, a rail structure, and when a simulation test is performed on the rail structure, the single box girder 80 and the rail structure shown in fig. 7 may be placed in the environmental simulation box 20 for a test, or the bottom plate 21 of the environmental simulation box 20 and the supporting plate 50 below the bottom plate may be removed, the single box girder 80 may be placed in the groove 11, and the rail structure on the single box girder 80 may be placed in the environmental simulation box 20 for a simulation test.
In summary, the above-mentioned engineering structure 40 model test system under the environment load coupling effect has at least the following technical effects: first, a plurality of vertical actuators 31 and horizontal actuators (e.g., 2) can simulate vertical and horizontal components of an external load; secondly, the boundary conditions of the engineering structure 43 may be constrained by springs or fixing bolts, considering the boundary condition problem of the engineering structure 40; then, the environmental box can consider environmental factors such as temperature, humidity, rainwater, sunshine, carbonization, salt fog and the like, and can move along the guide rail to change the position applied by the environment, so that the position of the test object does not need to be changed; finally, the seismic modeling shaker may also model the structural performance impact of the engineered structure 40 under three-dimensional seismic effects and ambient perturbations. Through the test means, the problems of the structural performance evolution law and the disaster-causing mechanism of the civil engineering structure 40 under the environment multi-factor and multi-load coupling action of the engineering structure 40 can be solved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that a person skilled in the art could make several structural features and improvements without departing from the inventive concept, which falls within the scope of protection of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (10)
1. The utility model provides an engineering structure model test system under environmental load coupling, its characterized in that, engineering structure model test system includes under the environmental load coupling:
the environment simulation box is used for placing an engineering structure for simulation test and providing preset environment conditions for the engineering structure;
the loading subassembly, the loading subassembly includes a plurality of actuator, the actuator be used for with engineering structure links to each other, transmits simulation external load for engineering structure.
2. The system for testing engineering structure model under the coupling action of environmental load according to claim 1, wherein the bottom plate of the environmental simulation box is an openable bottom plate.
3. The system for testing the engineering structure model under the environmental load coupling effect according to claim 1, further comprising a seismic simulation vibrating table connected to the environmental simulation box for transmitting the seismic load to the engineering structure in the environmental simulation box.
4. The system for testing engineering structure model under the coupling action of environmental load according to claim 1, wherein at least one door panel is arranged inside the environmental simulation box, and more than two door panels divide the internal space of the environmental simulation box into a plurality of testing environmental spaces.
5. The system of claim 4, further comprising a support plate disposed below the environmental chamber, wherein the environmental chamber is movably disposed on the support plate, and the door panel is openably disposed in the environmental chamber.
6. The system for testing the engineering structure model under the coupling action of the environmental load as claimed in claim 5, wherein a first slide rail is arranged on the supporting plate, and a first sliding member which moves along the first slide rail is arranged on the environmental simulation box; the door plate is an automatic door.
7. The system for testing the engineering structure model under the environmental load coupling effect according to claim 1, wherein the system for testing the engineering structure model under the environmental load coupling effect further comprises an excitation trolley, and the excitation trolley can move inside the environmental simulation box.
8. The system for testing the engineering structure model under the coupling action of the environmental load as claimed in claim 7, wherein the number of the excitation trolleys is two; the excitation trolley comprises a trolley body, wheels arranged on the trolley body, a frequency modulation motor for driving the wheels to rotate, an inertial navigation guide frame for guiding the movement path of the trolley body, and an adjustable weight block arranged on the trolley body.
9. The system for testing the engineering structure model under the coupling action of the environmental load as claimed in claim 1, wherein the loading assembly further comprises more than two reaction frames arranged at intervals; the actuators comprise more than two vertical actuators and more than two horizontal actuators, the more than two vertical actuators are arranged on the cross beam of the reaction frame, and the more than two horizontal actuators are arranged on the more than two vertical beams of the reaction frame in a one-to-one correspondence manner; the top plate of the environment simulation box is provided with more than two first windows which are in one-to-one correspondence with the two reaction frames, and the vertical actuator penetrates through the first windows, extends into the environment simulation box and is used for being connected with the engineering structure to transmit a simulated vertical load to the engineering structure; and more than two second windows are arranged on a side plate of the environment simulation box, and the horizontal actuator penetrates through the second windows and extends into the environment simulation box to be connected with the engineering structure so as to transmit the simulated horizontal load to the engineering structure.
10. The system for testing the engineering structure model under the coupling action of the environmental load according to any one of claims 1 to 9, wherein the environmental simulation box is provided with at least one of a temperature and humidity regulator, a rainfall simulator, an illumination simulator, a carbonization simulator and a salt spray simulator; the engineering structure model test system under the environment load coupling effect further comprises a sensing and collecting device for obtaining test information of the engineering structure; the sensing and collecting device comprises a plurality of high-definition cameras, a three-dimensional laser scanner, a fiber grating sensor, a hygrothermograph and a data collecting instrument.
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