CN112161870B - Loading device for rigidity test of structural node - Google Patents
Loading device for rigidity test of structural node Download PDFInfo
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- CN112161870B CN112161870B CN202011144959.4A CN202011144959A CN112161870B CN 112161870 B CN112161870 B CN 112161870B CN 202011144959 A CN202011144959 A CN 202011144959A CN 112161870 B CN112161870 B CN 112161870B
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- 238000012360 testing method Methods 0.000 title claims abstract description 142
- 238000009434 installation Methods 0.000 claims description 18
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- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The invention discloses a loading device for testing rigidity of a structural node, which comprises a node sliding device; the node sliding device comprises a carrier and a pulley block for driving the carrier to slide, the pulley block is arranged on the carrier, a node test piece is limited on the carrier, lateral limiting devices for limiting the rotation of the node test piece are respectively arranged outside a first side and a second side of the carrier, the two lateral limiting devices are oppositely arranged, and an axial limiting device for limiting the movement of the node test piece is arranged outside a third side of the carrier; the device comprises a reaction wall, a first loading device, a second loading device, a first lateral limiting device, a second lateral limiting device, a first loading device and a second loading device, wherein the first loading device is used for pushing a node test piece to approach or deviate from one of the lateral limiting devices, the second loading device is used for pushing the node test piece to approach or deviate from the axial limiting device, and the first loading device and the second loading device are respectively installed on the reaction wall. Thus, the two loading devices apply push-pull force according to the required loading direction respectively, so that rotation and drawing actions are simultaneously applied to the structural node to simulate the stress condition of the node test piece under double action.
Description
Technical Field
The invention relates to a testing device, in particular to a loading device for testing rigidity of a structural node.
Background
Structural nodes are one of the main elements of a building structure, and generally the components are limited by the maximum size of production or transportation, so that the components that join two or more fixed bodies together are called structural nodes. The structural node is a weak part of structural stress and widely exists in various building constructions.
At present, a general structure node loading device is a single rotation loading device or a single pultrusion loading device, but in reality, the structural node is often damaged and formed along with a pultrusion effect while rotating, so that the general structure node loading device cannot truly simulate the stress condition of the structural node in reality; furthermore, the superposition of the rotational and dial-pull effects may make the structural node more susceptible to damage.
In view of the above, the present inventors have conducted intensive studies on the basis of this, and have thus produced the present invention.
Disclosure of Invention
The invention aims to provide a loading device for testing rigidity of a structural node, and rotation and pultrusion actions are simultaneously acted on the structural node so as to simulate the stress condition of the real structural node and improve the testing accuracy.
To achieve the above object, the solution of the present invention is:
The utility model provides a loading device of structure node rigidity test which characterized in that: comprising a node sliding device for sliding; the node sliding device comprises a carrier and a pulley block for driving the carrier to slide, the pulley block is arranged on the carrier, a node test piece is placed on the carrier in a limiting mode, lateral limiting devices for limiting the rotation of the node test piece are respectively arranged outside a first side and a second side of the carrier, the two lateral limiting devices are arranged in a back-to-back mode, an axial limiting device for limiting the movement of the node test piece is arranged outside a third side of the carrier, the direction from the first side to the second side of the carrier is the longitudinal direction, and the direction perpendicular to the longitudinal direction is the transverse direction; the device comprises a lateral limiting device, a first loading device and a second loading device, wherein the lateral limiting device is used for limiting the lateral limiting device, the first loading device is used for limiting the lateral limiting device, the second loading device is used for limiting the lateral limiting device, the first loading device is used for limiting the lateral limiting device, the second loading device is used for limiting the lateral limiting device, and the first loading device and the second loading device are respectively arranged between a wall body and the lateral limiting device.
The two loading devices are respectively corresponding to the first loading device and the second loading device, the first loading device and the second loading device both comprise force application devices and fixing assemblies, the two fixing assemblies both comprise fixing plates arranged on the node test pieces and fixing sleeves arranged on the fixing plates, telescopic rods of the two force application devices are respectively inserted into the corresponding fixing sleeves, and the two force application devices are respectively arranged on the wall body.
The bottom of the carrier is provided with a plurality of fixing strips which are arranged along the longitudinal direction of the carrier, each fixing strip is arranged along the transverse direction of the carrier in sequence, two ends of each fixing strip are respectively provided with a pulley, and the pulleys together form the pulley block.
At least one carrier limiting strip is arranged on the side edge of the upper side of the carrier, and limiting areas for limiting the movement of the node test piece are formed on the carrier limiting strips.
The device further comprises a constraint fence arranged on the upper side of the node test piece, and the constraint fence is matched with the upper outline of the node test piece.
The two lateral limiting devices comprise a lateral ground anchor support used for fixing and a lateral limiting assembly arranged in the lateral ground anchor support;
The lateral limiting assembly comprises a lateral limiting strip, a plurality of lateral screws and a plurality of first rollers, wherein a mounting groove is formed in the lateral limiting strip, the first rollers are respectively rotatably mounted in the mounting groove, the first rollers protrude out of the mounting groove, and the first rollers are sequentially arranged along the length direction of the mounting groove; each lateral screw rod is arranged on the lateral limiting strip, and each lateral screw rod and each first roller are arranged on two sides of the lateral limiting strip respectively; and a plurality of mounting holes are formed in the lateral ground anchor support, the mounting holes and the lateral screws are respectively arranged in a one-to-one mode, and the lateral screws are respectively provided with lateral nuts.
When the two lateral ground anchor supports are arranged on the test flat ground, each first roller is clung to the node test piece.
The axial limiting device comprises a moving assembly, two axial limiting plates and an axial ground anchor support used for fixing, wherein the two axial limiting plates are arranged in the axial ground anchor support, and the two axial limiting plates are sequentially arranged along the up-down direction;
The movable assembly comprises a movable plate, an installation rod and a limiting frame, wherein the installation rod is installed on the movable plate through the limiting frame, the movable plate is installed on the node test piece, the installation rod is arranged up and down, two ends of the installation rod are respectively provided with a second roller wheel capable of rotating, the limiting frame is located between the two axial limiting plates, and the installation rod and the movable plate are respectively arranged on two sides of the axial limiting plates.
After the structure is adopted, the invention has the following beneficial effects:
1. The node sliding device, the first loading device and the second loading device are combined, the two loading devices apply push-pull force according to the required loading direction respectively, the node test piece is limited by the two lateral limiting devices, so that the node test piece generates a rotation effect under the action of push-pull force applied by the first loading device, namely, the structural node is acted by lateral force to have the rotation effect, and meanwhile, the node test piece is limited by the axial limiting devices, so that the node test piece generates a push-pull effect under the action of push-pull force applied by the second loading device, namely, the structural node is acted by drawing force, thereby realizing rotation and drawing action and simultaneously acting on the structural node to simulate the stress condition of double action of the node test piece, achieving the full mesh of testing the rigidity of the structural node, testing the actual stress condition of the joint actual structural node, and improving the accuracy and reliability of testing.
2. And the constraint fence is arranged, and an operator places a weight in the constraint fence according to the test requirement so as to simulate the condition of the node test piece when the node test piece is subjected to vertical load, so that the test accuracy is improved.
Drawings
FIG. 1 is a schematic diagram of a loading device (omitting a wall) according to the present invention;
FIG. 2 is a schematic view of a node slider according to the present invention;
FIG. 3 is a schematic view of another angle of the node slider according to the present invention;
FIG. 4 is a schematic diagram illustrating the assembly of a node slider and a node test piece according to the present invention;
FIG. 5 is a schematic view of an assembly of a node slide at another angle to a node test piece according to the present invention;
FIG. 6 is a schematic view of a lateral stop device;
FIG. 7 is an exploded view of the lateral stop device;
FIG. 8 is an assembled schematic view of a lateral stop device (with the lateral stop assembly omitted);
FIG. 9 is a schematic view of an axial stop device;
Fig. 10 is an exploded view of the axial stop.
In the figure:
100-node test pieces; 10-node slide means;
11-carrier; 12-fixing strips;
13-pulleys; 14-a carrier limit bar;
141-a restriction region; 20-a first loading device;
21-a force applicator; 22-a fixed assembly;
221-a fixing plate; 222-fixing the sleeve;
30-a second loading device; 40-a lateral limiting device;
41-lateral anchor supports; 411-lateral threaded holes;
412-lateral bolts; 42-lateral stop assembly;
421-lateral limit bars; 4211-a mounting groove;
422-lateral screw;
423-a first roller; 50-an axial limiting device;
51-an axial ground anchor support; 52-a moving assembly;
521-moving the plate; 522-mounting a rod;
523-limit frame; 53-an axial limiting plate;
531-a limit part; 54-axial screw;
55-a second roller; 60-restraining pens.
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by specific examples.
The utility model provides a loading device of structure node rigidity test for test the rigidity of node test piece, this node test piece is the test piece of the node structure that needs the test.
As shown in fig. 1 to 10, the device comprises a node sliding device 10, a first loading device 20 and a second loading device 30, wherein the node sliding device 10 is used for driving a node test piece 100 to slide at multiple angles, and the first loading device 20 and the second loading device 30 are used for applying push-pull force in a required loading direction.
The node sliding device 10 comprises a carrier 11 and a pulley block for driving the carrier to slide, the pulley block is arranged on the carrier 11, the carrier 11 is a square plate, the node test piece 100 is placed on the upper side of the carrier 11 and limited on the carrier 11, lateral limiting devices 40 are respectively arranged outside the first side and the second side of the carrier 11, namely, two lateral limiting devices 40 are arranged oppositely, and an axial limiting device 50 is arranged outside the third side of the carrier 11. The first loading device 20 and the second loading device 30 are respectively installed between the node test piece 100 and the wall, wherein the first loading device 20 is used for pushing the node test piece to approach or depart from one of the lateral limiting devices 40; the second loading device 30 is used for pushing the node test piece to approach or depart from the axial limiting device 50. The two lateral limiting devices are used for limiting the rotation of the carrier 11, and the node test piece 100 is limited on the carrier 11, so that the rotation of the node test piece 100 is limited; the axial stop 50 serves to limit the movement of the carrier 11, i.e. the movement of the limit node test piece 100.
In the invention, the loading directions of the structural nodes can be adjusted by the two loading devices according to the loading requirements in the actual testing process so as to form loading in any direction, such as pushing and pulling force applied in the direction forming an angle of 30 degrees with the node test piece 100. Preferably, the two loading devices can also adjust the loading size of the structural node according to the loading requirement in the actual testing process so as to test the structural node in different requirements.
For convenience of description, the left-right direction of the carrier 11 is taken as a longitudinal direction, the front-rear direction of the carrier 11 is taken as a transverse direction, wherein the first side and the second side are respectively corresponding to the left side and the right side, and the third side and the fourth side are respectively corresponding to the front side and the rear side. Wherein the front, rear, left and right sides are defined herein for convenience of description and understanding, the present invention is not limited to this orientation.
Specifically, the two loading devices are respectively a first loading device 20 and a second loading device 30, where the first loading device 20 is used to apply a pushing and pulling force along the longitudinal direction, so to speak, apply a lateral force to the node test piece 100 to move the front portion of the node test piece 100 laterally (i.e. along the left side or the right side); the second loading device 30 is used to apply a pushing and pulling force in the lateral direction, so to speak, to apply a longitudinal force to the node test piece 100 to move the node test piece 100 back and forth.
As shown in fig. 1-3, the node sliding device has the following specific structure: the bottom of the carrier 11 is provided with a plurality of fixing strips 12, each fixing strip 12 is arranged along the longitudinal direction of the carrier 11, and each fixing strip 12 is arranged at intervals along the transverse direction of the carrier 11 in sequence; pulleys 13 are respectively arranged at two ends of each fixing strip 12, and each pulley 13 is a universal wheel or a rolling wheel which is known in the prior art; the pulleys 13 together form the aforementioned pulley block, so that the carrier 11 can slide through the pulley block under the influence of an external force. At least one carrier limiting strip 14 is arranged on the side edge of the upper side of the carrier 10, the number of the carrier limiting strips 14 is set according to the size and shape of the node test piece 100 in actual test, and the carrier limiting strips 14 are all steel bars and are formed into a whole in sequence in a welding mode; the carrier limiting bars 14 are sequentially arranged along the outer contour of the upper side of the carrier 14, and the carrier limiting bars 14 together form a limiting area 141 matched with the node test piece 100, and the shape of the node test piece 100 shown in fig. 1 is taken as an example for explanation, the carrier limiting bars 14 have three, the first root and the second root are all L-shaped, the two ends of the third root are respectively the rear ends of the first root and the second root, the rear part of the node test piece 100 is tightly clamped in the limiting area 141 formed by the three carrier limiting bars 14, even if each side of the rear part of the node test piece 100 is limited and fixed in the limiting area 141, so that the node test piece 100 drives the carrier 11 to act together when being subjected to transverse or longitudinal pushing and pulling force.
Preferably, as shown in fig. 4-5, the present invention further includes a restraining rail 60, the restraining rail 60 being mounted on the upper side of the node test piece 100 in a manner known in the art, such as welding; the restraining rail 60 is matched with the upper contour of the node test piece 100, and is made of steel material as in the conventional known rail, and the restraining rail 60 is made of steel material. The unfolding ground, the constraint fence 60 comprises a lower constraint bar, an upper constraint bar and a plurality of vertical bars, wherein each vertical bar is arranged up and down, two ends of each vertical bar are respectively connected with the lower constraint bar and the upper constraint bar, and the lower constraint bars are arranged along the upper outline of the node test piece 100; thus, the constraint fence 60 and the node test piece 100 jointly form a placement area, so that a tester can conveniently place a weight in the placement area to simulate the condition of the node test piece 100 when being subjected to the weight, namely, the condition of vertical load, and the reliability and accuracy of the test are improved.
As shown in fig. 1 and fig. 6 to 8, the two lateral limiting devices 40 are respectively disposed at the left and right sides of the carrier 11, and the two lateral limiting devices 40 are respectively fixedly mounted on a test flat ground, which may be a flat ground such as a platform, a base or a ground of a test room, but is not limited to a certain place. The two lateral limiting devices 40 have the same structure, so one of them will be described as an example. The lateral limiting device 40 comprises a lateral ground anchor support 41 and a lateral limiting assembly 42, the lateral ground anchor support 41 is box-shaped, the lateral ground anchor support 41 is provided with an opening, the lateral limiting assembly 42 is installed in the lateral ground anchor support 41, and the lateral limiting assembly 42 is close to the side edge of the lateral ground anchor support 41.
Further, the lateral ground anchor support 41 is anchored on the test flat ground according to a conventional structure, for example, a plurality of lateral threaded holes corresponding to each other are respectively formed in the upper side and the lower side of the lateral ground anchor support 41, two groups of lateral threaded holes 411 corresponding to each other are respectively formed in one group, a plurality of lateral anchor holes are respectively formed in each group of the lateral anchor support, and a plurality of lateral anchor holes are respectively drilled on the test flat ground, each lateral anchor hole corresponds to each group one by one, and each lateral bolt 412 is respectively inserted into the corresponding lateral threaded hole 411 and the corresponding lateral mounting hole.
Further, the lateral limiting assembly 42 includes a lateral limiting bar 421, a plurality of lateral screws 422, and a plurality of first rollers 423. The lateral limiting bar 421 is provided with a mounting groove 4211, and the mounting groove 4211 is arranged along the length direction of the lateral limiting bar 421, and in this embodiment, the mounting groove 4211 is a channel steel; each first roller 423 is disposed up and down and is disposed in the mounting groove 4211 at intervals in sequence, and two ends of each first roller 423 are respectively rotatably mounted at two side walls of the mounting groove 4211, so that each first roller 423 can rotate, the rotating structure of each first roller 423 is a conventional known structure, such as a key connection, and corresponding portions of each first roller 423 are protruded out of the mounting groove 4211. Each lateral screw 422 and each first roller 423 are respectively arranged at two sides of the lateral limit bar 421, the first end of each lateral screw 422 is fixedly arranged on the lateral limit bar 421, each lateral screw 422 is respectively provided with a lateral thread section 4221 along the direction which is away from the lateral limit bar 421, the lateral screws 422 are respectively arranged in pairs, the two lateral screws 422 in the same group are sequentially arranged along the width direction of the lateral limit bar 421, and each group is respectively arranged at intervals along the length direction of the lateral limit bar 421; correspondingly, a plurality of lateral through holes are formed at the side wall of the lateral ground anchor support 41, the side wall is one side facing the opening of the lateral ground anchor support 41, each lateral through hole is respectively and one-to-one arranged with each lateral screw 422, and each lateral screw 422 is respectively provided with a lateral nut.
During installation, each lateral screw 422 is aligned to the corresponding lateral through hole respectively, so that the second end of each lateral screw 422 penetrates through the corresponding lateral through hole respectively, then each lateral nut is screwed on the corresponding lateral screw 422 respectively, so that the lateral limiting assembly 42 is fixed in the lateral ground anchor support 41, each first roller 423 faces the lateral ground anchor support 41 at the moment, each first roller 423 contacts with the node test piece 100 mutually, each first roller 423 plays an auxiliary role when the node test piece 100 moves forwards and backwards, and the node test piece 100 is prevented from being rubbed by the lateral limiting device in the forward and backward moving process to influence the abrasion of the node test piece 100. In addition, the length of each lateral screw 422 passing through the corresponding lateral through hole can be adjusted to adjust the distance between the lateral limiting component 42 protruding from the lateral ground anchor support 41, so as to ensure that each first roller 423 can be tightly attached to the node test piece 100.
Preferably, in order to increase the strength of the lateral limiting device, a partition plate arranged along the length direction is arranged in the lateral ground anchor support 41, and the lateral ground anchor support 41 is divided into a first chamber and a second chamber by the partition plate, and the two lateral screws 422 in the same group are respectively arranged in the first chamber and the second chamber.
As shown in fig. 9-10, the axial stop 50 includes an axial ground anchor support 51, a moving assembly 52, and two axial stop plates 53. The axial ground anchor support 51 is box-packed, and the axial ground anchor support 51 has an opening; the transverse cross section of two axial limiting plates 53 all is L style of calligraphy, and two axial limiting plates 53 are installed respectively in axial earth anchor support 51, and in two axial limiting plates 53 all are towards axial earth anchor support 51, two axial limiting plates 53 all are arranged along the length direction of axial earth anchor support 51 to along the upper and lower direction in proper order, two axial limiting plates 53 are arranged relatively, and the lateral wall of two axial limiting plates 53 all and the mutual smooth transition of side border of axial earth anchor support 51, are formed with the spacing portion 531 that is used for making the upper and lower direction spacing of moving assembly 52 between two axial limiting plates 53.
Further, the two axial limiting plates 53 are installed in the axial ground anchor support 51 in a conventional manner, for example, the installation structures of the two axial limiting plates 53 are the same, and taking one of them as an example for illustration, two opposite side walls of the axial limiting plates 53 are provided with axial installation holes, the axial ground anchor support 51 is provided with axial through holes corresponding to the axial installation holes respectively, the two corresponding axial installation holes and the axial through holes are combined into a group, each group is respectively provided with an axial screw 54 of the corresponding axial screw, and each axial screw 54 is respectively provided with an axial nut. During installation, the two axial limiting plates 53 are respectively installed in the axial ground anchor support 51, two opposite side walls of the two axial limiting plates 53 are respectively clung to the inner side wall of the axial ground anchor support 51, then each axial screw 54 respectively passes through the corresponding axial installation hole and the axial through hole, and then each axial nut is respectively screwed in the corresponding axial screw 54, so that the two axial limiting plates 53 are respectively and fixedly installed in the axial ground anchor support 51.
Further, the axial anchor support 51 is anchored to the test flat ground in a conventional structure which is identical to the aforementioned mounting structure of the lateral anchor support 51 and will not be described again.
Further, the moving assembly 52 includes a moving plate 521, a mounting bar 522, and a stopper 523. The mounting bar 522 is connected to one side of the moving plate 521 through a limiting frame 523, the moving plate 521 is fixedly mounted on the front side of the node test piece 100, and the mounting structure of the moving plate 521 is a conventional mounting structure, for example, four corners of the moving plate 521 are respectively provided with moving mounting holes, each moving mounting hole is respectively provided with a fixing pin, and the moving plate 521 is respectively fixed on the node test piece 100 through the inserting fit of each moving mounting hole and the corresponding fixing pin. The limit frame 523 includes two connecting rods which are arranged in two opposite directions, and the two connecting rods are sequentially arranged along the width direction of the limit portion 531, the first ends of the two connecting rods are fixedly connected with the movable plate 521, the second ends of the two connecting rods are fixedly connected with the mounting rod 522, and two ends of the mounting rod 522 are respectively provided with the rotatable second rollers 55, namely two second rollers 55, wherein the distance between the two connecting rods is the width of the limit portion 531. The stopper 523 may be a bracket, a frame, or the like.
In this way, when the installation rod 522 passes through the limiting part 531 and enters the axial ground anchor support 51, the moving assembly 52 is limited in the limiting part 531 in the up-down direction by the combined action of the two connecting rods, and the moving plate 521 is fixed on the node test piece 100, so that the moving assembly 52 can only move in the left-right direction, and at this time, the two second rollers 55 play an auxiliary role.
As shown in fig. 1-5, the first loading device 20 and the second loading device 30 are identical in structure, and thus the first loading device 20 is exemplified.
The first loading device 20 comprises an applicator 21 and a fixing assembly 22, the applicator 21 being adapted to generate a pushing or pulling force. The force applicator 21 is cylindrical, and the force applicator 21 is a device which is known to generate reciprocating force, such as a hydraulic device or an electric push rod; the fixing assembly 22 includes a fixing plate 221 and a fixing sleeve 222, and the fixing sleeve 22 is fixedly mounted on the fixing plate 221, and the fixing plate 221 and the fixing sleeve are connected in a conventional manner, such as integral molding or welding; the fixing plate 221 is fixedly mounted on the node test piece 100, and the mounting structure of the fixing plate 221 is the same as that of the moving plate 521, so that the description thereof will not be repeated; the telescopic rod of the force applicator 21 is arranged in the longitudinal direction, and the telescopic rod of the force applicator 21 is tightly inserted into the fixed sleeve 22, and the end face of the housing of the force applicator 21 is mounted on a wall body, such as a reaction wall.
The mounting position of the second loading device 30 is different from the mounting position of the first loading device 20. In the second loading device 30, the telescopic rod of the force applicator thereof is arranged in the lateral direction.
As shown in fig. 1-10, the specific installation process of the present invention is: firstly, mounting a pulley block on a carrier 11, hoisting a node test piece 100 on the carrier 11, placing the node test piece 100 in a good position, and then welding a carrier limiting bar 14 on the upper side of the carrier 11 in a manner of clinging to the lower outline of the node test piece 100 according to the shape and the size of the node test piece 100; then, the two lateral limiters 40 are respectively and fixedly arranged on the test flat ground in the manner described above, the first rollers 423 on the two lateral limiters 40 are respectively clung to the node test piece 100, and the axial limiter 50 is fixedly arranged on the test flat ground in the manner described above; then welding the restraint rail 60 on the node test piece 100, and stacking weights in the restraint rail 60 according to the pressure requirement in the test process; then, the first loading device 20 and the second loading device are installed in the foregoing manner.
Preferably, the above-mentioned node test piece 100 is not limited to the above-mentioned shape and size, nor the connection characteristics, the node test piece 100 may be at least one of rigid, semi-rigid and/or flexible connection, and the materials of the node test piece 100 may be the same or a combination of different materials as a whole.
Preferably, the portion of the node test piece 100 connected to the first loading device 20 and the portion connected to the second loading device 30 are respectively embedded or integrally formed with each other.
According to the loading device for testing the rigidity of the structural node, after the node test piece 100 is installed, force applicators on the first loading device 20 and the second loading device 30 work, and the two force applicators simultaneously act on the node test piece 100; the force application device on the first loading device 20 continuously stretches to enable the node test piece 100 to be circularly subjected to left pushing force and right pulling force, and an effect of rotating the node test piece 100 is generated; the force application device on the second loading device 30 continuously stretches, so that the node test piece 100 is circularly subjected to forward pushing force and backward pulling force, and the drawing effect of the node test piece 100 is generated, and therefore the rotation and push-pull effects are simultaneously exerted on the node test piece 100, the situation that the structural node is subjected to the action of two-way force in reality is simulated, and the purpose of testing the rigidity of the structural node is achieved.
In the invention, the loading device is composed of the node sliding device 10, the first loading device 20, the second loading device 30, the axial limiting device 50 and the two lateral limiting devices 40, and the devices are assembled and disassembled conveniently, so that the invention can be assembled freely according to the size and the type of the node test piece 100, can be reused, is convenient for testing by a tester, and saves the testing cost.
In the present invention, the node test piece 100, the first loading device 20 and the second loading device 30 are respectively provided with a test instrument, and the test instruments are all known measuring instruments.
Specifically, the test instruments on the node test piece 100 include inclinometers, displacement meters, and strain gages. The inclinometer is arranged on the upper side of the carrier 11 and is clung to the position where the node test piece 100 is expected to rotate; the displacement meters are respectively arranged at the positions of the node test piece 100 corresponding to the force application positions of the two loading devices, the node test piece 100 corresponding to the inclinometer and the node test piece 100 corresponding to the middle position between the inclinometer and the first loading device 20 and are respectively used for checking the displacement at the loading positions and measuring the lateral displacement of the node test piece 100; the strain gages are respectively arranged at different positions of the node test piece 100 in the lateral direction for measuring the lateral deformation of the node test piece 100.
The measuring instrument on the first loading device 20 comprises a pressure sensor and a distance meter, which are respectively arranged at the loading positions corresponding to the first loading device 20, the pressure sensor is used for measuring the applied lateral force, and the distance meter is used for measuring the displacement of the loading positions corresponding to the first loading device 20. The measuring instrument on the second loading device 30 comprises a pressure sensor and a distance meter, which are respectively installed at the loading positions corresponding to the second loading device 30, the pressure sensor is used for measuring the magnitude of the applied push-pull force, and the distance meter is used for measuring the displacement of the loading positions corresponding to the second loading device 20.
The foregoing description is only of the preferred embodiments of the present invention, and all equivalent changes and modifications that come within the scope of the following claims are intended to be embraced therein.
Claims (7)
1. The utility model provides a loading device of structure node rigidity test which characterized in that: comprising a node sliding device for sliding; the node sliding device comprises a carrier and a pulley block for driving the carrier to slide, the pulley block is arranged on the carrier, a node test piece is placed on the carrier in a limiting mode, lateral limiting devices for limiting the rotation of the node test piece are respectively arranged outside a first side and a second side of the carrier, the two lateral limiting devices are arranged in a back-to-back mode, an axial limiting device for limiting the movement of the node test piece is arranged outside a third side of the carrier, the direction from the first side to the second side of the carrier is the longitudinal direction, and the direction perpendicular to the longitudinal direction is the transverse direction; the device comprises a lateral limiting device, a first loading device and a second loading device, wherein the lateral limiting device is used for limiting the lateral limiting device to the wall body, the first loading device is used for limiting the lateral limiting device to the wall body, the second loading device is used for limiting the lateral limiting device to the wall body, and the second loading device is used for limiting the lateral limiting device to the wall body;
the two lateral limiting devices comprise a lateral ground anchor support used for fixing and a lateral limiting assembly arranged in the lateral ground anchor support; the lateral limiting assembly comprises a lateral limiting strip, a plurality of lateral screws and a plurality of first rollers, wherein a mounting groove is formed in the lateral limiting strip, the first rollers are respectively rotatably mounted in the mounting groove, the first rollers protrude out of the mounting groove, and the first rollers are sequentially arranged along the length direction of the mounting groove; each lateral screw rod is arranged on the lateral limiting strip, and each lateral screw rod and each first roller are arranged on two sides of the lateral limiting strip respectively; and a plurality of mounting holes are formed in the lateral ground anchor support, the mounting holes and the lateral screws are respectively arranged in a one-to-one mode, and the lateral screws are respectively provided with lateral nuts.
2. A loading device for testing rigidity of structural nodes according to claim 1, wherein: the two loading devices are respectively corresponding to the first loading device and the second loading device, the first loading device and the second loading device both comprise a force applicator and a fixing assembly, and the two fixing assemblies both comprise a fixing plate arranged on the node test piece and a fixing sleeve arranged on the fixing plate; the telescopic rods of the two force applicators are respectively inserted into the corresponding fixing sleeves, and the two force applicators are respectively arranged on the wall body.
3. A loading device for testing rigidity of structural nodes according to claim 1, wherein: the bottom of the carrier is provided with a plurality of fixing strips which are arranged along the longitudinal direction of the carrier, each fixing strip is arranged along the transverse direction of the carrier in sequence, two ends of each fixing strip are respectively provided with a pulley, and the pulleys together form the pulley block.
4. A loading device for structural node stiffness testing according to any of claims 1-3, wherein: at least one carrier limiting strip is arranged on the side edge of the upper side of the carrier, and limiting areas for limiting the movement of the node test piece are formed on the carrier limiting strips.
5. A loading device for structural node stiffness testing according to any of claims 1-3, wherein: the device further comprises a constraint fence arranged on the upper side of the node test piece, and the constraint fence is matched with the upper outline of the node test piece.
6. A loading device for testing rigidity of structural nodes according to claim 5, wherein: when the two lateral ground anchor supports are arranged on the test flat ground, each first roller is clung to the node test piece.
7. A loading device for structural node stiffness testing according to any of claims 1-3, wherein: the axial limiting device comprises a moving assembly, two axial limiting plates and an axial ground anchor support used for fixing, wherein the two axial limiting plates are arranged in the axial ground anchor support, and the two axial limiting plates are sequentially arranged along the up-down direction;
The movable assembly comprises a movable plate, an installation rod and a limiting frame, wherein the installation rod is installed on the movable plate through the limiting frame, the movable plate is installed on the node test piece, the installation rod is arranged up and down, two ends of the installation rod are respectively provided with a second roller wheel capable of rotating, the limiting frame is located between the two axial limiting plates, and the installation rod and the movable plate are respectively arranged on two sides of the axial limiting plates.
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| CN202011144959.4A CN112161870B (en) | 2020-10-23 | 2020-10-23 | Loading device for rigidity test of structural node |
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| CN202011144959.4A CN112161870B (en) | 2020-10-23 | 2020-10-23 | Loading device for rigidity test of structural node |
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| CN213689188U (en) * | 2020-10-23 | 2021-07-13 | 华侨大学 | Loading device for structural joint rigidity test |
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| US7758479B2 (en) * | 2004-07-22 | 2010-07-20 | Husted Royce H | Loading device for exercise machines |
| US7441471B1 (en) * | 2006-12-13 | 2008-10-28 | Davis John D | Ground anchor load testing system and method |
| CN103175707A (en) * | 2013-03-25 | 2013-06-26 | 同济大学 | Testing apparatus suitable for substructure robustness of beam-column joints of planar frames |
| RU173125U1 (en) * | 2016-11-11 | 2017-08-14 | Российская Федерация в лице Министерства промышленности и торговли Российской Федерации (Минпромторг России) | Stand for testing the mechanical strength of the design of an aircraft with an aerodynamic profile |
| CN106644324B (en) * | 2016-12-30 | 2019-01-15 | 北京工业大学 | A kind of experimental rig can be used for light steel frame bean column node Experiment of Mechanical Behavior |
| CN107525726B (en) * | 2017-10-01 | 2023-08-04 | 华北理工大学 | Oblique loading device for beam slab column joints of frame structure |
| CN109490086B (en) * | 2018-12-24 | 2021-03-02 | 山东科技大学 | Roadway surrounding rock support strength test device and strength determination method |
| CN210513606U (en) * | 2019-10-15 | 2020-05-12 | 中铁城建集团有限公司 | Test loading device for T-shaped steel skeleton section steel concrete complex node |
| CN111238938B (en) * | 2020-03-09 | 2024-07-02 | 华侨大学 | Lateral limiting loading device and application method thereof |
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