Anti-seismic test device and test method thereof

Abstract

The invention particularly relates to an anti-seismic test device and a test method thereof. The anti-seismic test device comprises a test base, a support frame, a simulated vibration test mechanism, a laminated slab mounting assembly and a vertical push-pull mechanism, a test piece comprises a laminated slab and a bracket which are fixedly connected, the test base comprises a base and a reaction wall, and the support frame comprises a reaction support beam fixedly connected with the reaction wall. The simulation vibration test mechanism comprises a clamping assembly, a vertical jack, a connecting plate and an actuator, the clamping assembly comprises a plurality of clamping units, each clamping unit comprises two clamping pieces, the two clamping pieces abut against the two side faces of the bracket respectively, and the two clamping pieces are fixedly connected; the vertical jack is fixedly connected with the counter-force supporting beam; the actuator is connected with the reaction wall; the movable end of the actuator is detachably and fixedly connected with the connecting plate, and the connecting plate is fixedly connected with all the clamping pieces on one side. The laminated slab mounting assembly comprises two mounting units, and each mounting unit comprises a gusset component abutting against the side face of the laminated slab.

Description

Technical Field

[0001] This application relates to the technical field of seismic tests for building structures, and more specifically, to a seismic test device and its test method. Background Art

[0002] In the construction industry, seismic performance has always been a core element in ensuring the safety of buildings and the lives and property of occupants. Earthquake disasters have powerful destructive forces, seriously threatening the stability and integrity of various building facilities. With the acceleration of the urbanization process, the scale of buildings is constantly expanding, and the requirements for the seismic performance of buildings are becoming increasingly stringent.

[0003] As a key component of the building structure system, concrete connection structures are widely used. Among them, the overlapping slab double-chamber pipe gallery node, as a common form of concrete connection structure, is widely adopted in many construction projects. However, under earthquake action, the connection structure often becomes the weakest link in the entire building structure. The strong vibrations generated by the earthquake will cause complex stress and strain in the structure. Due to its structural characteristics and force-bearing mode, the connection structure is more likely to develop serious problems such as cracks, deformations, and even fractures compared to other parts, which will then lead to a decrease in the load-bearing capacity of the entire building structure and pose safety hazards.

[0004] In view of this, it is particularly necessary to conduct seismic tests on concrete connection structures. However, there is no seismic test device and method for overlapping slab double-chamber pipe gallery nodes in the existing technology, so it is impossible to conduct seismic tests on overlapping slab double-chamber pipe gallery nodes. Summary of the Invention

[0005] In view of this, this application provides a seismic test device and its test method, aiming to improve the situation that there is no seismic test device and method for overlapping slab double-chamber pipe gallery nodes in the existing technology.

[0006] In a first aspect, this application provides a seismic test device for conducting seismic tests on specimens of overlapping slab double-chamber pipe gallery nodes. The specimen includes an overlapping slab and a corbel extending in a first direction, and the first direction is parallel to the horizontal plane;

[0007] The seismic test device includes:

[0008] A test base, including a base and a reaction wall. The base is parallel to the horizontal plane, the reaction wall is perpendicular to the horizontal plane. The overlapping slab is arranged on the base with its first surface facing upward, and the first surface of the corbel is fixedly connected to the first surface of the overlapping slab;

[0009] A support frame, including a reaction brace beam. The reaction brace beam is located above the corbel and is fixedly connected to the reaction wall;

[0010] The simulated vibration test mechanism includes a clamping assembly, a vertical jack, a connecting plate, and an actuator. The clamping assembly includes a plurality of clamping units arranged in the vertical direction. Each clamping unit includes two clamping members arranged opposite to each other in the second direction. The clamping members extend in the first direction. The second direction is parallel to the horizontal plane and perpendicular to the first direction. In each clamping unit, the opposite sides of the two clamping members respectively abut against the two side surfaces of the bracket in the second direction, and the same-side ends of the two clamping members in the first direction are fixedly connected by a first tension bolt; the fixed end of the vertical jack is fixedly connected to the reaction support beam, and the telescopic end of the vertical jack is used to abut against the second surface of the bracket; the fixed end of the actuator is connected to the reaction wall, the movable end of the actuator is detachably and fixedly connected to the connecting plate, and the connecting plate is fixedly connected to all the clamping members on the side of the bracket close to the reaction wall in the second direction; and

[0011] The laminated slab installation assembly includes two installation units, which respectively correspond to the two sides of the laminated slab in the second direction. Each installation unit includes a corner brace member. Each corner brace member includes a plurality of fixed corner braces arranged in the first direction. Each fixed corner brace includes two mutually perpendicular right-angled surfaces. In each fixed corner brace, one right-angled surface abuts against the side surface of the laminated slab in the second direction, and the other right-angled surface abuts against and is fixedly connected to the base.

[0012] Preferably, the seismic test device further includes a vertical push-pull mechanism, which is connected to the fixed end of the actuator, and the vertical push-pull mechanism is slidably connected to the reaction wall in the vertical direction.

[0013] Preferably, each installation unit further includes a pressure beam and a cushion beam. The pressure beam abuts against the first surface of the laminated slab. The bottom surface of the cushion beam is connected to the base, the top surface of the cushion beam abuts against the second surface of the laminated slab, and the same-side ends of the cushion beam and the pressure beam in the first direction are fixedly connected by a third tension bolt.

[0014] Preferably, the vertical push-pull mechanism includes a slideway column, a slider, and a push-pull jack. The slideway column is arranged perpendicular to the horizontal plane and is fixedly connected to the reaction wall. The slider is slidably connected to the slideway column. The fixed end of the push-pull jack is fixedly connected to the reaction support beam, and the telescopic end of the push-pull jack is connected to the slider.

[0015] Preferably, the laminated slab installation assembly further includes a support beam, which extends in the first direction. In the second direction, the support beam is located in the middle of the laminated slab, and the two side surfaces of the support beam in the vertical direction respectively abut against the second surface of the laminated slab and the base.

[0016] Preferably, the support frame further includes a connecting side beam and two support side frames. The two support side frames are arranged oppositely along the second direction. One of the support side frames is fixedly connected to the reaction wall, and the bottom of the other support side frame is fixedly connected to the base; the connecting side beam extends along the second direction, and both ends of the connecting side beam are respectively connected to the two support side frames.

[0017] Preferably, the support side frame is a rectangular frame structure. The support side frame includes two first beams and a second beam. The two first beams are vertically established. One second beam is fixedly connected to the tops of the two first beams, and the other second beam is fixedly connected to the bottoms of the two first beams; the two second beams of each support side frame are fixedly connected by a strengthening column; the reaction support beam is parallel to the horizontal plane, and both ends of the reaction support beam are respectively fixedly connected to the two strengthening columns.

[0018] In a second aspect, the present application provides a seismic test method, which uses the seismic test device provided in the first aspect of the present application;

[0019] The seismic test method includes the following steps:

[0020] Step 1: Start the vertical jack so that the telescopic end of the vertical jack abuts against the second surface of the corbel.

[0021] Step 2: Connect the movable end of the actuator to the connecting plate.

[0022] Step 3: Start the actuator to push and pull the connecting plate once by the actuator, observe the test piece, and record the test results.

[0023] Step 4: Repeat Step 3, using a successive loading method, with each loading amplitude of 20 kN; after each loading is completed, apply force to the test piece after the loading force is stable, and record the test results of multiple times; until cracks appear on the test piece.

[0024] Step 5: Continue to use a step-by-step loading method, and change the loading amplitude to 50 kN each time; after each loading is completed, apply force to the test piece after the loading force is stable, and record the test results of multiple times; until the test piece breaks or fails.

[0025] Step 6: Organize the test results.

[0026] Preferably, before Step 1, it further includes: before Step 1, a light-colored coating is applied to the surface of the test piece.

[0027] Preferably, the test results include: the initial state of the test piece, the position, shape, length, width, and crack extension direction of the crack.

[0028] Compared with the prior art, an anti-seismic test device and a test method provided by the present application at least achieve the following beneficial effects:

[0029] In the anti-seismic test device provided by the present application, the anti-seismic test device includes a test base, a support frame, a simulated vibration test mechanism, and a laminated slab installation component. Among them, the test base includes a base and a reaction wall, and the test piece is arranged on the base, and the test base provides an installation foundation for the test piece. The support frame includes a reaction support beam, the reaction support beam is located above the corbel, and the reaction support beam is fixedly connected to the reaction wall. The simulated vibration test mechanism includes a vertical jack, and the fixed end of the vertical jack is fixedly connected to the reaction support beam, and the reaction support beam provides an installation carrier for the vertical jack. The simulated vibration test mechanism further includes a clamping component, a connecting plate, and an actuator; among them, the laminated slab installation component includes two installation units, and the two installation units respectively correspond to both sides of the laminated slab along the second direction. Each installation unit includes a corner brace member, and each corner brace member includes a plurality of fixed corner braces arranged along the first direction. The fixed corner brace includes two mutually perpendicular right-angled surfaces. In each fixed corner brace, one right-angled surface abuts against the side surface of the laminated slab along the second direction, and the other right-angled surface abuts against and is fixedly connected to the base. Thus, the two fixed corner braces of each corner brace member can apply pressure to the laminated slab on both sides of the laminated slab along the second direction, and limit and fix the laminated slab in the horizontal plane direction, that is, the two installation units realize the clamping of the laminated slab, so that the position of the laminated slab in the horizontal plane direction is guaranteed to be fixed. At the same time, the telescopic end of the vertical jack is used to abut against the second surface of the corbel, and the vertical jack can apply a downward force to the test piece from above the second surface of the corbel to realize the clamping of the test piece and limit and fix the test piece in the vertical direction. It can be seen that the fixing of the test piece is realized through the laminated slab installation component and the vertical jack, reducing or even avoiding the movement of the laminated slab during the anti-seismic test, ensuring the smooth progress of the anti-seismic test of the test piece, and thus being conducive to ensuring the reliability of the test results.

[0030] In addition, the clamping assembly includes a plurality of clamping units arranged in the vertical direction. The plurality of clamping units are distributed at various positions in the vertical direction of the bracket. Specifically, in implementation, the distance between adjacent clamping units can be kept consistent; each clamping unit includes two clamping members arranged opposite to each other in the second direction, and the clamping members extend in the first direction. The second direction is parallel to the horizontal plane and perpendicular to the first direction. In each clamping unit, the opposite sides of the two clamping members are respectively abutted against the two side surfaces of the bracket in the second direction, and the same-side ends of the two clamping members in the first direction are fixedly connected by a first tension bolt. In this way, each clamping unit can clamp and fix the bracket in the horizontal plane direction, and the plurality of clamping units can clamp and fix the bracket in a plurality of different horizontal plane directions; the connecting plate is fixedly connected to all the clamping members on the side of the bracket close to the reaction wall in the second direction. In this way, the connecting plate fixedly connects all the clamping units into a whole; the fixed end of the actuator is connected to the reaction wall, and the reaction wall provides an installation carrier for the actuator. The movable end of the actuator is detachably and fixedly connected to the connecting plate. In this way, the actuator can apply a pushing and pulling force to the connecting plate, and this pushing and pulling force can be transmitted and dispersed to various parts of the bracket through the clamping unit. Under the pushing and pulling force of the actuator, cracks, deformations or even fractures are likely to occur in the bracket; at the same time, when the actuator just starts to apply a pushing and pulling force to the bracket, the laminated slab is stationary relative to the bracket. After the bracket is stressed, the bracket can drive the laminated slab to move at the same time, and cracks, deformations or even fractures may also occur in the laminated slab. There may be certain differences in the movement amplitude and frequency between the laminated slab and the bracket, and cracks, deformations or even fractures are likely to occur at the connection between the laminated slab and the bracket; the seismic test device provided by the embodiment of the present application simulates the stress conditions of the laminated slab and the bracket when an earthquake occurs, can deeply understand the mechanical properties and failure modes of the laminated slab double-chamber pipe gallery node specimen under earthquake conditions, accurately obtain relevant data, and provide a strong basis for optimizing the design. This not only helps to improve the seismic performance of a single laminated slab double-chamber pipe gallery node specimen, but also has an inestimable and profound significance for comprehensively improving the seismic performance of the overall building, and can lay a solid foundation for the sustainable development of the construction industry.

[0031] Of course, it is not necessary for any product implementing the present application to specifically achieve all the above-mentioned technical effects at the same time.

[0032] Through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings, other features and advantages of the present application will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.

[0034] Figure 1 The following shows a schematic structural diagram of the seismic resistance test device provided by the embodiment of the present application;

[0035] Figure 2 The following is a schematic structural diagram of the simulated vibration test mechanism in the embodiment of the present application;

[0036] Figure 3 The following is a schematic structural diagram of the vertical push-pull mechanism in the embodiment of the present application;

[0037] Figure 4 The following is a step diagram of the earthquake resistance test method provided by the embodiment of the present application.

[0038] Description of the reference numerals:

[0039] 10 - Composite slab, 20 - Corbels, 110 - Foundation, 120 - Reaction wall, 210 - Reaction bracing beam, 220 - Connecting side beam, 230 - Support frame, 240 - Reinforcing column, 310 - Clamping assembly, 311 - Clamping member, 312 - First tension bolt, 320 - Connecting plate, 330 - Vertical jack, 340 - Actuator, 410 - Installation unit, 411 - Corner bracing member, 401 - Fixed corner brace, 412 - Press beam, 413 - Cushion beam, 414 - Third tension bolt, 420 - Support beam, 500 - Vertical push-pull mechanism, 510 - Slideway column, 520 - Slide block, 530 - Push-pull jack. Detailed implementation manners

[0040] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present application and its application or use.

[0042] Techniques, methods, and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and equipment should be regarded as part of the specification.

[0043] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0044] Without departing from the spirit or scope of the present application, various modifications and variations can be made in the present application, which will be apparent to those skilled in the art. Therefore, the present application is intended to cover modifications and variations of the present application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in the present application can be combined with each other without conflict.

[0045] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it will not be further discussed in subsequent figures.

[0046] Figure 1 The structural schematic diagram of the earthquake resistance test device provided by the embodiment of the present application is shown. Figure 2 The structural schematic diagram of the simulated vibration test mechanism in the embodiment of the present application is shown.

[0047] Please refer to Figures 1 to 3 , the embodiment of the present application provides an earthquake resistance test device for performing an earthquake resistance test on a laminated slab double-chamber pipe gallery joint specimen. The specimen includes a laminated slab 10 and a corbel 20 extending along a first direction D1. The first direction D1 is parallel to the horizontal plane.

[0048] The earthquake resistance test device includes a test base, a support frame, a simulated vibration test mechanism, and a laminated slab installation assembly.

[0049] Among them, the test base includes a base 110 and a reaction wall 120. The base 110 is parallel to the horizontal plane, and the reaction wall 120 is perpendicular to the horizontal plane. The laminated slab 10 is placed on the base 110, the first surface of the laminated slab 10 faces upward, and the first surface of the corbel 20 is fixedly connected to the first surface of the laminated slab 10.

[0050] The support frame includes a reaction support beam 210. The reaction support beam 210 is located above the corbel 20, and the reaction support beam 210 is fixedly connected to the reaction wall 120.

[0051] The simulated vibration test mechanism includes a clamping assembly 310, a vertical jack 330, a connecting plate 320, and an actuator 340. The clamping assembly 310 includes a plurality of clamping units arranged along the vertical direction V. The plurality of clamping units are arranged in a row along the vertical direction V. Each clamping unit includes two clamping members 311 arranged opposite to each other along the second direction D2. The clamping members 311 extend along the first direction D1. The second direction D2 is parallel to the horizontal plane and perpendicular to the first direction D1. In each clamping unit, the opposite sides of the two clamping members 311 are respectively abutted against the two side surfaces of the corbel 20 along the second direction D2, and the same-side ends of the two clamping members 311 along the first direction D1 are fixedly connected by a first tie bolt 312. The fixed end of the vertical jack 330 is fixedly connected to the reaction support beam 210, and the telescopic end of the vertical jack 330 is used to abut against the second surface of the corbel 20. The fixed end of the actuator 340 is connected to the reaction wall 120, and the movable end of the actuator 340 is detachably and fixedly connected to the connecting plate 320. The connecting plate 320 is fixedly connected to all the clamping members 311 on the side of the corbel 20 close to the reaction wall 120 along the second direction D2.

[0052] The laminated slab installation assembly includes two installation units 410, which respectively correspond to both sides of the laminated slab 10 along the second direction D2. Each installation unit 410 includes a corner brace member 411. Each corner brace member 411 includes a plurality of fixed corner braces 401 arranged along the first direction D1. Each fixed corner brace 401 includes two mutually perpendicular right-angled surfaces. In each fixed corner brace 401, one right-angled surface abuts against the side surface of the laminated slab 10 along the second direction D2, and the other right-angled surface abuts against and is fixedly connected to the base 110.

[0053] In this embodiment, the seismic test device includes a test base, a support frame, a simulated vibration test mechanism, and a composite slab installation assembly. Among them, the test base includes a base 110 and a reaction wall 120. The test piece is arranged on the base 110, and the test base provides an installation foundation for the test piece. The support frame includes a reaction support beam 210. The reaction support beam 210 is located above the corbel 20, and the reaction support beam 210 is fixedly connected to the reaction wall 120. The simulated vibration test mechanism includes a vertical jack 330. The fixed end of the vertical jack 330 is fixedly connected to the reaction support beam 210, and the reaction support beam 210 provides an installation carrier for the vertical jack 330. The simulated vibration test mechanism further includes a clamping assembly 310, a connecting plate 320, and an actuator 340. Among them, the composite slab installation assembly includes two installation units 410, and the two installation units 410 respectively correspond to both sides of the composite slab 10 along the second direction D2. Each installation unit 410 includes a corner brace member 411. Each corner brace member 411 includes a plurality of fixed corner braces 401 arranged along the first direction D1. The fixed corner brace 401 includes two mutually perpendicular right-angled surfaces. In each fixed corner brace 401, one right-angled surface abuts against the side surface of the composite slab 10 along the second direction D2, and the other right-angled surface abuts against and is fixedly connected to the base 110. In this way, the two fixed corner braces 401 of each corner brace member 411 can apply pressure to the composite slab 10 on both sides of the composite slab 10 along the second direction D2, and limit and fix the composite slab 10 in the horizontal plane direction. That is, the two installation units 410 realize the clamping of the composite slab 10, so that the position of the composite slab 10 is guaranteed to be fixed in the horizontal plane direction. At the same time, the telescopic end of the vertical jack 330 is used to abut against the second surface of the corbel 20, and the vertical jack can apply a downward force to the test piece from above the second surface of the corbel 20 to realize the clamping of the test piece and limit and fix the test piece in the vertical direction V. It can be seen that the fixing of the test piece is realized through the composite slab installation assembly and the vertical jack 330, reducing or even avoiding the movement of the composite slab during the seismic test, ensuring that the seismic test of the test piece can be carried out smoothly, and thus being conducive to ensuring the reliability of the test results.

[0054] In addition, the clamping assembly 310 includes a plurality of clamping units arranged along the vertical direction V, and the plurality of clamping units are distributed at various positions of the corbel 20 in the vertical direction V. Specifically, in implementation, the distance between adjacent clamping units can be kept consistent; each clamping unit includes two clamping members 311 arranged opposite to each other along the second direction D2, and the clamping members 311 extend along the first direction D1. The second direction D2 is parallel to the horizontal plane and perpendicular to the first direction D1. In each clamping unit, the opposite sides of the two clamping members 311 are respectively abutted against the two side surfaces of the corbel 20 along the second direction D2, and the same-side ends of the two clamping members 311 along the first direction D1 are fixedly connected by a first tension bolt 312. In this way, each clamping unit can clamp and fix the corbel 20 in the horizontal plane direction, and the plurality of clamping units can clamp and fix the corbel 20 in a plurality of different horizontal plane directions; the connecting plate 320 is fixedly connected to all the clamping members 311 on the side of the corbel 20 close to the reaction wall 120 along the second direction D2. In this way, the connecting plate 320 fixedly connects all the clamping units into a whole; the fixed end of the actuator 340 is connected to the reaction wall 120, and the reaction wall 120 provides an installation carrier for the actuator 340. The movable end of the actuator 340 is detachably and fixedly connected to the connecting plate 320. In this way, the actuator 340 can apply a pushing and pulling force to the connecting plate 320, and this pushing and pulling force can be transmitted and dispersed to various parts of the corbel 20 through the clamping units. Under the pushing and pulling force of the actuator 340, cracks, deformations or even fractures are likely to occur in the corbel 20; at the same time, when the actuator 340 just starts to apply a pushing and pulling force to the corbel 20, the laminated slab 10 is stationary relative to the corbel 20. After the corbel 20 is stressed, the corbel 20 can drive the laminated slab 10 to move at the same time, and cracks, deformations or even fractures may also occur in the laminated slab 10. There may be certain differences in the movement amplitude and frequency between the laminated slab 10 and the corbel 20, and cracks, deformations or even fractures are likely to occur at the connection between the laminated slab 10 and the corbel 20; the seismic test device provided by the embodiment of the present application simulates the stress condition of the test piece during an earthquake, can deeply understand the mechanical properties and failure modes of the laminated slab double-chamber pipe gallery node test piece under seismic conditions, accurately obtain relevant data, and provide a strong basis for optimized design. This not only helps to improve the seismic performance of a single laminated slab double-chamber pipe gallery node test piece, but also has a profound and significant impact on comprehensively improving the seismic performance of the overall building, and can lay a solid foundation for the sustainable development of the construction industry.

[0055] Figure 3 The following shows the structural schematic diagram of the vertical push-pull mechanism in the embodiment of the present application. Refer to Figure 1 and Figure 3, in some embodiments, the seismic test device further includes a vertical push-pull mechanism 500. The vertical push-pull mechanism 500 is connected to the fixed end of the actuator 340, and the vertical push-pull mechanism 500 is slidably connected to the reaction wall 120 in the vertical direction V. In this way, the position of the actuator 340 in the vertical direction can be adjusted and moved through the vertical push-pull mechanism 500, so that the movable end of the actuator 340 can be opposite to the central position of the corbel 10 in the vertical direction. In this embodiment, the applicable range and flexibility of use of the seismic test device are improved by adding the vertical push-pull mechanism 500.

[0056] During the actual seismic test operation, the test piece will vibrate and there will be a certain small movement relative to the base 110. There will inevitably be a certain friction between the test piece and the base 110, causing wear on the second surface of the laminated slab 10. To reduce or even avoid the occurrence of the above situation, continue to refer to Figure 1 , in some embodiments, each mounting unit 410 further includes a mounting member. Each mounting member includes a pressure beam 412 and a cushion beam 413. The pressure beam 412 abuts against the first surface of the laminated slab 10. The bottom surface of the cushion beam 413 is connected to the base 110, and the top surface of the cushion beam 413 abuts against the second surface of the laminated slab 10. The cushion beam 413 and the pressure beam 412 are fixedly connected by a third pair of tension bolts 414 at the same-side ends along the first direction D1.

[0057] In this embodiment, each mounting unit 410 further includes a mounting member. Each mounting member includes a pressure beam 412 and a cushion beam 413. The bottom surface of the cushion beam 413 is connected to the base 110, and the top surface of the cushion beam 413 abuts against the second surface of the laminated slab 10. The cushion beam 413 supports the test piece from the second surface of the laminated slab 10, avoiding direct contact between the test piece and the base 110, protecting the second surface of the laminated slab 10, and reducing the influence of the frictional force between the test piece and the ground on the force received by the test piece. In addition, the pressure beam 412 abuts against the first surface of the laminated slab 10, and the cushion beam 413 and the pressure beam 412 are fixedly connected by a third pair of tension bolts 414 at the same-side ends along the first direction D1, so that the mounting member is fixedly connected to the laminated slab 10. In this way, relative movement between the mounting member and the laminated slab 10 is reduced or even avoided, and the laminated slab 10 is prevented from detaching from the mounting member and coming into contact with the base 110 to cause friction.

[0058] Refer to Figure 3 , in some embodiments, the vertical push-pull mechanism 500 includes a slideway column 510, a slider 520, and a push-pull jack 530. The slideway column 510 is arranged perpendicular to the horizontal plane and fixedly connected to the reaction wall 120. The slider 520 is slidably connected to the slideway column 510. The fixed end of the push-pull jack 530 is fixedly connected to the reaction support beam 210, and the telescopic end of the push-pull jack 530 is connected to the slider 520.

[0059] Refer to Figure 1, in some embodiments, the laminated slab installation assembly further includes a support beam 420. The support beam 420 extends along the first direction D1. Along the second direction D2, the support beam 420 is located in the middle of the laminated slab 10, and the two side surfaces of the support beam 420 along the vertical direction V respectively abut against the second surface of the laminated slab 10 and the base 110.

[0060] In this embodiment, the support beam 420 can support the laminated slab 10 at the middle position along the second direction D2 of the second surface of the laminated slab 10, improving the support reliability of the laminated slab installation assembly for the laminated slab 10.

[0061] See Figure 1 , in some embodiments, the support frame further includes a connecting side beam 220 and two support side frames 230. The two support side frames 230 are arranged oppositely along the second direction D2. One support side frame 230 is fixedly connected to the reaction wall 120, and the bottom of the other support side frame 230 is fixedly connected to the base 110; the connecting side beam 220 extends along the second direction D2, and the two ends of the connecting side beam 220 are respectively connected to the two support side frames 230.

[0062] In this embodiment, the test piece is placed between the two support side frames 230, and the entire support frame is arranged around the test piece; the two support side frames 230 are respectively fixedly connected to the reaction wall 120 and the base 110, and the two ends of the connecting side beam 220 are respectively connected to the two support side frames 230. In this way, the structural stability of the support frame is improved, and further, the working reliability of the vertical jack 330 and the actuator 340 installed on the support frame can be ensured.

[0063] Furthermore, the support side frame 230 is a rectangular frame structure. The support side frame 230 includes two first beams and a second beam. The two first beams are vertically established. One second beam is fixedly connected to the tops of the two first beams, and the other second beam is fixedly connected to the bottoms of the two first beams; the two second beams of each support side frame 230 are fixedly connected by a strengthening column 240; the reaction support beam 210 is parallel to the horizontal plane, and the two ends of the reaction support beam 210 are respectively fixedly connected to the two strengthening columns 240.

[0064] In this embodiment, the support side frame 230 adopts a rectangular frame structure, which has a simple structure and stable structure. The structural stability and structural strength of the support side frame 230 can be further improved through the strengthening column 240, thereby further improving the structural stability of the support frame.

[0065] Figure 4 The figure shows the step diagram of the seismic resistance test method provided by the embodiment of the present application.

[0066] The embodiment of the present application also provides a seismic resistance test method for a laminated slab double-chamber pipe gallery joint test piece, adopting the seismic resistance test device in any of the above embodiments.

[0067] The seismic test method includes the following steps:

[0068] Step 1: Start the vertical jack 330 so that the telescopic end of the vertical jack 330 abuts against the second surface of the corbel 20.

[0069] Step 2: Connect the movable end of the actuator 340 to the connecting plate 320.

[0070] Step 3: Start the actuator 340 to push and pull the connecting plate 320 once, observe the test piece, and record the test results.

[0071] Step 4: Repeat Step 3, adopting a successive loading method with a loading amplitude of 20 kN each time; after each loading is completed, apply force to the test piece after the loading force is stable, and record the test results of multiple times; until cracks appear on the test piece.

[0072] Step 5: Continue to adopt a step-by-step loading method, and change the loading amplitude to 50 kN each time; after each loading is completed, apply force to the test piece after the loading force is stable, and record the test results of multiple times; until the test piece breaks or fails.

[0073] Step 6: Organize the test results.

[0074] In this embodiment, in Step 1, by starting the vertical jack 330, the telescopic end of the vertical jack 330 abuts against the upward-facing surface of the corbel 20. In this way, the vertical jack 330 can clamp and fix the corbel 20 in the vertical direction V; in Step 2, the movable end of the actuator 340 is connected to the connecting plate 320; in Step 4, repeat Step 3, adopting a successive loading method with a loading amplitude of 20 kN each time; after each loading is completed, apply force to the test piece after the loading force is stable, and record the test results of multiple times; until cracks appear on the test piece; in Step 5, continue to adopt a step-by-step loading method, and change the loading amplitude to 50 kN each time; after each loading is completed, apply force to the test piece after the loading force is stable, and record the test results of multiple times; until the test piece breaks or fails; in Step 6, organize the test results.

[0075] Through systematic and scientific seismic tests, this embodiment can deeply understand the mechanical properties and failure modes of the composite slab double-chamber pipe gallery node test pieces under different seismic conditions, accurately obtain relevant data, and provide a strong basis for optimizing the design.

[0076] In some embodiments, before Step 1, it also includes: painting a light-colored coating on the surface of the test piece. In this way, it is convenient for the staff to observe cracks and fractures.

[0077] In some embodiments, the test results include: the initial state of the test piece, the position, shape, length, width of the cracks, and the crack extension direction.

[0078] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A seismic test device for conducting seismic tests on composite slab double-storage pipe gallery node specimens, characterized in that: The specimen includes a laminated plate and a corbel extending in a first direction, wherein the first direction is parallel to a horizontal plane; The seismic test equipment includes: The test base comprises a base and a reaction wall, wherein the base is parallel to a horizontal plane, the reaction wall is perpendicular to the horizontal plane, the composite plate is arranged on the base, the first surface of the composite plate faces upward, and the first surface of the corbel is fixedly connected to the first surface of the composite plate; A support frame, comprising a reaction support beam, the reaction support beam is located above the corbel, and the reaction support beam is fixedly connected to the reaction wall; A simulated vibration test mechanism, comprising a clamping assembly, a vertical jack, a connecting plate and an actuator, wherein the clamping assembly comprises a plurality of clamping units, the plurality of clamping units are arranged in a vertical direction, each of the clamping units comprises two clamping members arranged opposite to each other in a second direction, the clamping members extend in a first direction, the second direction is parallel to a horizontal plane and perpendicular to the first direction, in each clamping unit, opposite sides of the two clamping members respectively abut against two side surfaces of the corbel in the second direction, and the ends of the two clamping members on the same side in the first direction are fixedly connected by a first tension bolt; the fixed end of the vertical jack is fixedly connected to the reaction support beam, and the telescopic end of the vertical jack is used to abut against the second surface of the corbel; the fixed end of the actuator is connected to the reaction wall, the movable end of the actuator is detachably fixedly connected to the connecting plate, and the connecting plate is fixedly connected to all clamping members located on the side of the corbel close to the reaction wall in the second direction; and The composite plate installation assembly includes two installation units, and the two installation units correspond to the two sides of the composite plate along the second direction respectively. Each installation unit includes a gusset component, and each gusset component includes a plurality of fixed gussets arranged along the first direction. The fixed gussets include two right-angle surfaces perpendicular to each other. In each fixed gusset, one right-angle surface abuts against the side surface of the composite plate along the second direction, and the other right-angle surface abuts against and is fixedly connected to the base.

2. The seismic test device according to claim 1, characterized in that: It also includes a vertical push-pull mechanism, which is connected to the fixed end of the actuator and is slidably connected to the reaction wall in the vertical direction.

3. The seismic test device according to claim 1, characterized in that: Each installation unit also includes a pressure beam and a cushion beam, wherein the pressure beam abuts against the first surface of the composite plate, the bottom surface of the cushion beam is connected to the base, the top surface of the cushion beam abuts against the second surface of the composite plate, and the cushion beam and the pressure beam are fixedly connected at the same side ends along the first direction by a third tension bolt.

4. The seismic test device according to claim 1, characterized in that: The vertical push-pull mechanism includes a slide column, a slider and a push-pull jack. The slide column is arranged perpendicular to the horizontal plane and is fixedly connected to the reaction wall. The slider is slidably connected to the slide column. The fixed end of the push-pull jack is fixedly connected to the reaction support beam. The telescopic end of the push-pull jack is connected to the slider.

5. The seismic test device according to claim 1, characterized in that: The composite plate installation assembly also includes a support beam, which extends along the first direction. Along the second direction, the support beam is located in the middle of the composite plate, and the two side surfaces of the support beam along the vertical direction are respectively abutted against the second surface of the composite plate and the base.

6. The seismic test device according to claim 1, characterized in that: The support frame also includes a connecting side beam and two supporting frames, the two supporting frames are arranged opposite to each other along the second direction, one supporting frame is fixedly connected to the reaction wall, and the bottom of the other supporting frame is fixedly connected to the base; the connecting side beam extends along the second direction, and the two ends of the connecting side beam are respectively connected to the two supporting frames.

7. The seismic test device according to claim 6, characterized in that: The support frame is a rectangular frame structure, and the support frame includes two first beams and a second beam, the two first beams are vertically arranged, one second beam is fixedly connected to the top ends of the two first beams, and the other second beam is fixedly connected to the bottom ends of the two first beams; The two second beams of each supporting frame are fixedly connected by a reinforcing column; The reaction support beam is parallel to the horizontal plane, and two ends of the reaction support beam are respectively fixedly connected to the two reinforcement columns.

8. A seismic test method, characterized in that: A seismic test device according to any one of claims 1 to 7; The seismic test method comprises the following steps: Step 1: start the vertical jack so that the telescopic end of the vertical jack abuts against the second surface of the corbel; Step 2, connecting the movable end of the actuator to the connecting plate; Step 3, starting the actuator, causing the actuator to push and pull the connecting plate once, observing the test piece, and recording the test results; Step 4, repeat step 3, adopting a sequential loading method, with a loading amplitude of 20 kN each time; after each loading is completed, apply force to the specimen after the loading force is stable, and record multiple test results; until the specimen has cracks; Step 5: Continue to use the step-by-step loading method, and change the loading amplitude to 50KN each time; after each loading is completed, apply force to the specimen after the loading force is stable, and record multiple test results; until the specimen breaks or fails; Step 6: Organize the test results.

9. The seismic test method according to claim 8, characterized in that: Before step one, the method further includes: applying light-colored paint to the surface of the test piece.

10. The seismic test method according to claim 8, characterized in that: The test results include: the initial state of the specimen, the position, shape, length, width of the crack and the direction of crack extension.

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