Anti-seismic performance detection device based on building structure

Abstract

The invention belongs to the technical field of anti-seismic performance detection, and discloses an anti-seismic performance detection device based on a building structure, which comprises a support base and a movable plate arranged above the support base and used for supporting, the movable plate is provided with a support disc used for connecting a test workpiece, the movable plate is rotatably connected with the support disc, and the lower end of the movable plate is provided with a transmission plate. A first sliding rail is connected to the lower end of the movable plate, a telescopic assembly is connected between the first sliding rail and the transmission plate, transmission rollers are connected to the bottom of the telescopic assembly, limiting plates are arranged on the two sides of the supporting base, limiting sliding grooves are formed in the limiting plates, and the transmission rollers extend into the limiting sliding grooves. According to the anti-seismic performance detection device based on the building structure, the anti-seismic performance of the building structure can be more accurately detected by setting vibration simulation in various directions, and vibration in different directions can be generated in different time periods according to different arrival time of various seismic waves generated by an earthquake to detect a building structure model; and the accuracy of detection data is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake resistance performance detection, and in particular to an earthquake resistance performance detection device based on a building structure. Background Art

[0002] With the continuous increase in housing and the rapid development of the economy, people pay more attention to the seismic performance of building structures, so it is necessary to test the seismic performance of building structures, which requires the use of seismic performance testing equipment.

[0003] However, there are still some problems when using the existing seismic performance testing devices based on building structures: There is an existing building structure detection device with Chinese patent application number CN202321817885.5, which includes: a base, the outer surface of the base is provided with a groove, the inner wall of the groove is fixedly connected to a shock absorber, one end of the shock absorber is fixedly connected to a support base, the outer surface of the support base is fixedly connected to a No. 1 fixing block, the outer surface of the No. 1 fixing block is connected to a screw motor, the output end of the screw motor is fixedly connected to a screw, and the outer surface of the screw is movably connected to a sliding module; a telescopic rod, the output end of the telescopic rod is fixedly connected to a clamping frame, the outer surface of the clamping frame is fixedly connected to a vibration motor, the outer surface of the clamping frame is fixedly connected to an electric telescopic rod, and the output end of the electric telescopic rod is fixedly connected to a plywood; Although existing seismic performance testing devices can use vibration motors to generate corresponding vibration effects, the vibration direction is uncontrollable and cannot effectively simulate the vibration effects of earthquakes, making the reliability of the test results relatively low.

[0004] In response to the above problems, an innovative design was carried out based on the original seismic performance testing device based on building structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a seismic performance testing device based on a building structure to solve the problem raised in the above background technology that the existing seismic performance testing equipment for building structures cannot effectively simulate the vibration effects during an earthquake, resulting in relatively low accuracy of the testing results of the building structure.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a seismic performance testing device based on a building structure, comprising a support base and a movable plate disposed above for support, wherein the movable plate is configured to connect to a support plate of a test workpiece: The movable plate is rotatably connected to the support plate, a transmission plate is provided at the lower end of the movable plate, a first slide rail is connected to the lower end of the movable plate, and a telescopic assembly is connected between the first slide rail and the transmission plate; The bottom of the telescopic component is connected to a transmission roller, and limit plates are set on both sides of the support base. A limit slide is opened inside the limit plate, and the transmission roller extends into the limit slide; Support plates are fixed on the front and rear sides of the support base, the upper end of the support plate is connected to the transmission shaft, and cams are connected on both sides of the transmission shaft, sliding plates are provided at the lower ends of the front and rear sides of the movable plate, and transmission protrusions are fixed on the inner side of the sliding plate, and the outer side of the sliding plate is connected to the transmission vertical plate, and a transmission assembly is provided at the upper end of the support base, and the transmission assembly is connected to the transmission vertical plate, and the position of the transmission vertical plate and the transmission protrusion can be changed to realize the change of the vibration direction of the support disk.

[0007] Preferably, an L-shaped limit block is fixed to the upper end of the support plate, which can limit the placement position of the building structure model during installation, and the limit blocks are distributed in a circular array with the center point of the support plate as the axis. The surface array of the support plate is provided with holes for bolt connection when installing the building structure model.

[0008] By adopting the above technical solution, the installation position of the building structure model can be limited by multiple sets of limit blocks, ensuring that the installation position of the building structure is close to the center area of the support plate, and the holes on the surface of the support plate are convenient for bolting and fixing the building structure model.

[0009] Preferably, a groove is provided on the outer wall of the support plate, a driven gear ring is connected to the inside of the groove, a first motor is provided at the upper right end of the movable plate, the lower end of the first motor is suspended and fixed above the movable plate through a mounting frame, a driving gear is connected to the lower shaft end of the first motor, and the driving gear extends into the inside of the groove and engages with the driven gear ring, and the rotation of the driving gear can change the direction of the building structure model at the upper end of the support plate.

[0010] By adopting the above technical solution, the first motor can drive the driving gear to rotate, and the driving gear can drive the driven gear ring and the support plate to rotate, thereby changing the installation angle of the building structure model. Since the specific direction of the vibration generated by an earthquake cannot be predicted, this structure can adjust the angle of the building structure model to conduct multi-directional seismic tests.

[0011] Preferably, the transmission shaft is rotatably connected to the support plate, and the cams are symmetrically distributed at both ends of the transmission shaft. A second motor is fixed to the upper end of the support plate at the front end, and the front shaft end of the second motor is fixed to the transmission shaft. A second slide rail is fixed to the lower end of the movable plate, and the sliding plate is slidably connected to the second slide rail. The lower end of the sliding plate is fixed to the transmission protrusion, and the lower end surface of the transmission protrusion contacts the cam.

[0012] By adopting the above technical solution, the second motor can drive the transmission shaft to rotate, and the transmission shaft can drive the cam to rotate. During the rotation process, the cam contacts the transmission bump, which can lift the transmission bump, sliding plate and movable plate upward, thereby achieving up and down vibration, simulating the initial earthquake effect.

[0013] Preferably, the transmission vertical plate is symmetrically arranged on the left and right sides of the cam, the lower end of the transmission vertical plate is narrower than the upper end, the upper end of the support base is slidably connected to a slider, and a limiting groove is provided at the upper end of the slider, the lower end of the transmission vertical plate extends into the inside of the limiting groove, and the transmission vertical plate is slidably connected to the limiting groove, the lower end of the support plate is rotatably connected to a bidirectional screw rod, and the bidirectional screw rod is threadedly connected to the slider.

[0014] By adopting the above technical solution and designing the transmission side plate, when the sliding plate drives the transmission vertical plate and the transmission protrusion to move, the positions of the transmission protrusion and the transmission vertical plate are changed during the movement of the sliding plate. After the transmission vertical plate moves to the cam position, the cam can drive the transmission vertical plate to move left and right when it rotates, and the transmission vertical plate is used to drive the sliding plate and the movable plate to move synchronously, simulating the situation when the shear wave arrives during an earthquake.

[0015] Preferably, the rear ends of the bidirectional screw and the transmission shaft extend to the rear end of the support plate, the rear end of the bidirectional screw is fixed with a first pulley, the rear end of the transmission shaft is fixed with a second pulley, and a transmission belt is connected between the first pulley and the second pulley.

[0016] By adopting the above technical solution, synchronous transmission between the transmission shaft and the bidirectional screw can be achieved through the cooperation of the first pulley, the second pulley and the transmission belt.

[0017] Preferably, the lower end of the first slide rail is slidably connected to a support sleeve, the lower end of the support sleeve is slidably connected to a support link, the support link is fixedly connected to the transmission plate, a return spring is provided inside the support sleeve, and the upper and lower ends of the return spring are respectively fixed to the inner wall of the support sleeve and the support link.

[0018] By adopting the above technical solution, the support of the movable plate can be achieved through the cooperation of the support sleeve and the support connecting rod, and the upper end of the support sleeve cooperates with the first slide rail to simulate the transverse wave condition on the movable plate without driving the support connecting rod and the support sleeve to move.

[0019] Preferably, the transmission roller is rotatably connected to the lower end of the support link, and a damping bearing is used to connect the transmission roller and the support link. The diameter of the middle part of the transmission roller is smaller than that of the two sides, and the middle part of the transmission roller contacts the inner wall of the limiting slide groove, and the limiting slide groove is designed in a wavy shape.

[0020] Preferably, a transmission groove is provided in the middle of the transmission plate, and the transmission groove and the transmission vertical plate form a locking structure.

[0021] By adopting the above technical solution, after the two sets of sliders continue to move relative to each other, the transmission vertical plate continues to move and engages with the transmission groove, so that when the transmission vertical plate moves left and right, it synchronously drives the transmission plate to move, and then drives the supporting connecting rod and the support sleeve to move synchronously. Due to the cooperation of the transmission roller of the limiting slide groove, the movable plate can move in a wave-like manner, simulating the surface waves generated after the earthquake.

[0022] Compared with the existing technology, the beneficial effects of the present invention are: the seismic performance detection device based on the building structure can more accurately detect the seismic performance of the building structure by setting vibration simulations in multiple directions, and can generate vibrations in different directions in different time periods according to the different arrival times of various waves generated by the earthquake to detect the building structure model, thereby improving the accuracy of the detection data.

[0023] 1. By providing a rotatable support plate for installing the building structure model, the driving structure can be used to rotate the building structure model after installation, thereby changing the direction of vibration to the building structure. Since the propagation direction of seismic waves cannot be determined during an actual earthquake, this structure can facilitate multi-directional detection of the building structure model, further improving detection accuracy. 2. The multi-directional vibration detection of building structure models uses cams to provide power. The structure is simple and reliable. The vibration direction can be changed by changing the contact between different transmission structures and the cam. The multi-directional vibration can be performed intermittently to simulate the different vibrations caused by the different arrival times of earthquake longitudinal waves, shear waves and surface waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view structural diagram of the present invention; Figure 3 This is a schematic structural diagram of the support disc and driven gear ring of the present invention; Figure 4 This is a schematic diagram of the support sleeve and the first slide rail structure of the present invention; Figure 5 This is a schematic diagram of the transmission roller and limiting slide structure of the present invention; Figure 6 This is a schematic diagram of the transmission plate and transmission groove structure of the present invention; Figure 7 This is a schematic diagram of the transmission riser and slider structure of the present invention; Figure 8 This is a schematic diagram of the transmission shaft and cam structure of the present invention; Figure 9 This is a schematic structural diagram of the driving gear and the driven gear ring of the present invention; Figure 10 It is a schematic diagram of the structure of the slider and the limiting groove of the present invention.

[0025] In the figure: 1. Support base; 2. Movable plate; 3. Support plate; 4. Limit block; 5. First motor; 6. Driving gear; 7. Driven gear ring; 8. Transmission plate; 9. Support connecting rod; 10. Support sleeve; 11. First slide rail; 12. Return spring; 13. Transmission roller; 14. Limit plate; 15. Limit slide groove; 16. Support plate; 17. Transmission shaft; 18. Second motor; 19. Cam; 20. Second slide rail; 21. Sliding plate; 22. Transmission bump; 23. Transmission vertical plate; 24. Slider; 25. Limit groove; 26. Bidirectional screw; 27. First pulley; 28. Second pulley; 29. Transmission belt; 30. Transmission groove. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-10The present invention provides a technical solution: a seismic performance testing device based on a building structure, comprising a supporting base 1 and a movable plate 2 arranged on the top for supporting, and the movable plate 2 is provided with a supporting plate 3 for connecting a test workpiece; rubber gaskets are bonded to the four corners of the lower end of the supporting base 1 to maintain stability after placement, so as to avoid the inertia generated by the movement of the upper building structure model during testing causing the device to deviate; an "L"-shaped limit block 4 is fixed to the upper end of the supporting plate 3, and the limit block 4 can limit the placement position of the building structure model during installation, and the limit blocks 4 are distributed in a ring array with the center point of the supporting plate 3 as the axis, and an array of holes is opened on the surface of the supporting plate 3 for bolt connection when installing the building structure model; the building structure model to be tested can be directly placed on the upper end of the supporting plate 3, and multiple groups of limit blocks 4 can limit the placement area so that the building structure model is as close as possible to the middle of the supporting plate 3, avoiding the situation where part of the part is suspended due to placement deviation. After placement, the building structure model can be reliably fixed to the surface of the support plate 3 by connecting it with the bolts and the holes. The movable plate 2 is rotatably connected to the support plate 3, and a groove is provided on the outer wall of the support plate 3, and a driven gear ring 7 is connected inside the groove. A first motor 5 is provided at the upper end of the right side of the movable plate 2, and the lower end of the first motor 5 is suspended and fixed above the movable plate 2 through a mounting frame. The lower shaft end of the first motor 5 is connected with a driving gear 6, and the driving gear 6 extends into the groove and engages with the driven gear ring 7. The rotation of the driving gear 6 can change the direction of the building structure model at the upper end of the support plate 3. Because the direction of the seismic wave cannot be determined during a real earthquake, in order to simulate a real earthquake, a rotating structure is provided to change the installation direction of the building structure model, so as to conduct a multi-directional vibration test and improve the accuracy of the detection results; by starting the first motor 5, the driving gear 6 can be driven to rotate, and the driving gear 6 cooperates with the driven gear ring 7 to drive the support plate 3 to rotate, thereby changing the installation direction of the building structure model.

[0028] A transmission plate 8 is provided at the lower end of the movable plate 2, and a first slide rail 11 is connected to the lower end of the movable plate 2. A telescopic assembly is connected between the first slide rail 11 and the transmission plate 8; support plates 16 are fixed to the front and rear sides of the support base 1, the upper end of the support plate 16 is connected to a transmission shaft 17, and cams 19 are connected to both sides of the transmission shaft 17. Sliding plates 21 are provided at the lower ends of the front and rear sides of the movable plate 2, and transmission protrusions 22 are fixed on the inner sides of the sliding plates 21; the movable plate 2 can be supported by the telescopic structure, and the movable plate 2 is connected to the telescopic structure through the first slide rail 11 to prevent the horizontal movement of the movable plate 2 from being blocked or interfered with by the telescopic structure; the transmission shaft 17 is rotatably connected to the support plate 16, and the cam 19 is connected to the transmission shaft 17. Symmetrically distributed at both ends of the transmission shaft 17, a second motor 18 is fixed to the upper end of the front support plate 16, and the front shaft end of the second motor 18 is fixed to the transmission shaft 17, a second slide rail 20 is fixed to the lower end of the movable plate 2, and the sliding plate 21 is slidably connected to the second slide rail 20, the lower end of the sliding plate 21 is fixed to the transmission protrusion 22, and the lower end surface of the transmission protrusion 22 is in contact with the cam 19; during detection, the second motor 18 is first started to drive the transmission shaft 17 and the cam 19 to rotate, and when the cam 19 contacts the transmission protrusion 22, the rotation can drive it to move upward, and the transmission protrusion 22 is used to drive the sliding plate 21 and the movable plate 2 to vibrate up and down, simulating the vibration condition caused by the initial longitudinal wave of an earthquake.

[0029] The outer side of the sliding plate 21 is connected to the transmission vertical plate 23, and a transmission assembly is provided at the upper end of the support base 1. The transmission assembly is connected to the transmission vertical plate 23, and the positions of the transmission vertical plate 23 and the transmission protrusion 22 can be changed to realize the change of the vibration direction of the support plate 3; the transmission vertical plate 23 cooperates with the cam 19 to drive the movable plate 2 to move horizontally, thereby simulating the vibration generated when the transverse wave generated by the earthquake arrives.

[0030] The transmission vertical plate 23 is symmetrically arranged on the left and right sides of the cam 19. The lower end of the transmission vertical plate 23 is narrower than the upper end. The upper end of the support base 1 is slidably connected to the slider 24, and the upper end of the slider 24 is provided with a limit groove 25. The lower end of the transmission vertical plate 23 extends into the limit groove 25, and the transmission vertical plate 23 is slidably connected to the limit groove 25. The lower end of the support plate 16 is rotatably connected to the bidirectional screw rod 26, and the bidirectional screw rod 26 is threadedly connected to the slider 24; the rear ends of the bidirectional screw rod 26 and the transmission shaft 17 both extend to the rear end of the support plate 16, and the rear end of the bidirectional screw rod 26 A first pulley 27 is fixed, a second pulley 28 is fixed to the rear end of the transmission shaft 17, and a transmission belt 29 is connected between the first pulley 27 and the second pulley 28; during the detection process, the vibration direction or vibration mode is changed by changing the cooperation between different transmission structures and the cam 19, and the belt structure is used to drive the transmission shaft 17 and the bidirectional screw 26 to rotate synchronously, the transmission shaft 17 drives the second pulley 28 to rotate, and the second pulley 28 uses the transmission belt 29 to drive the first pulley 27 and the bidirectional screw 26 to rotate. When the bidirectional screw rod 26 rotates, it can drive the two groups of sliders 24 to move in relative directions. The sliders 24 drive the transmission vertical plate 23, the sliding plate 21 and the transmission protrusion 22 to move synchronously. During the movement of the transmission protrusion 22, it gradually dislocates with the cam 19 and releases contact, and the movable plate 2 stops moving up and down; after the cam 19 and the transmission protrusion 22 are released from contact, the transmission vertical plate 23 moves to the position of the cam 19 and contacts it, and when the cam 19 rotates, it can push the transmission vertical plate 23 to move horizontally, and utilize the sliding plate 21 and the second slide rail 20 to drive the movable plate 2 to move synchronously, thereby simulating the vibration effect generated when the shear wave arrives during an earthquake and the destructive effect caused by the shear wave. When in use, the transmission ratio of the first pulley 27 and the second pulley 28 can also be changed according to specific needs, thereby changing the movement speed of the slider 24, adjusting the overall vibration duration and the vibration switching interval.

[0031] The bottom of the telescopic component is connected to a transmission roller 13, and limit plates 14 are provided on both sides of the support base 1. A limit slide groove 15 is provided inside the limit plate 14, and the transmission roller 13 extends inside the limit slide groove 15; the lower end of the first slide rail 11 is slidably connected to a support sleeve 10, and the lower end of the support sleeve 10 is slidably connected to a support link 9, the support link 9 is fixedly connected to the transmission plate 8, and a return spring 12 is provided inside the support sleeve 10, and the upper and lower ends of the return spring 12 are respectively fixed to the inner wall of the support sleeve 10 and the support link 9; the telescopic component is connected to the movable plate 2 by the first slide rail 11 to ensure that the telescopic component will not be driven to move during the simulation of seismic shear and longitudinal waves, and the support sleeve 10 and the support link 9 can keep the movable plate 2 stable when it is lifted and lowered, and the design of the return spring 12 can stretch the return spring 12 when the movable plate 2 moves upward, and when the cam 19 continues to rotate, the return spring 12 can pull the movable plate 2 to return downward, thereby improving the returning speed and smoothness of the movable plate 2. The transmission roller 13 is rotatably connected to the lower end of the support link 9, and the transmission roller 13 and the support link 9 are connected by a damping bearing. The diameter of the middle portion of the transmission roller 13 is smaller than that of the two sides, and the middle portion of the transmission roller 13 contacts the inner wall of the limiting chute 15, which is designed in a wavy shape. A transmission groove 30 is defined in the middle of the transmission plate 8, and the transmission groove 30 forms a locking structure with the transmission riser 23. Because more destructive surface waves are present in the later stages of an earthquake, this is also an important indicator for evaluating the seismic resistance of a building structure. During use, when the slider 24 drives the two sets of transmission risers 23 to move to opposite sides, the transmission risers 23 move a certain distance before moving into the transmission groove 30 defined in the middle of the transmission plate 8, thereby causing the transmission risers 23 and the transmission plate 8 to reciprocate synchronously, driving the support sleeve 10 and the support link 9 to follow the movement. However, because the lower end of the supporting link 9 utilizes a drive roller 13 that engages a limiting chute 15, and the wave patterns of the limiting chute 15 on the left and right sides are in opposite directions, the two drive rollers 13 move in the same direction, one group moving upward and the other downward, switching directions during continuous movement. This causes the movable panel 2 to produce a wave-like undulation during movement, simulating the surface wave vibration effect in the late stages of an earthquake. The design of the drive roller 13, with the width between the two sides being larger than the middle, allows it to be securely installed within the limiting plate 14 and engage with the limiting chute 15. The damping bearing design damps the horizontal movement of the telescopic assembly, ensuring that no movement occurs during shear wave simulation.

[0032] When the cam 19 switches transmission with the transmission protrusion 22 and the transmission vertical plate 23 and the transmission vertical plate 23 is engaged with the transmission groove 30, the center of the transmission vertical plate 23 and the center of the cam 19 are on the same vertical line to ensure normal switching of the multi-vibration transmission.

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seismic performance testing device based on a building structure, comprising a support base (1) and a movable plate (2) arranged on the upper portion for supporting, wherein the movable plate (2) is provided with a support plate (3) for connecting a test workpiece, characterized in that: The movable plate (2) is rotatably connected to the support plate (3); a transmission plate (8) is provided at the lower end of the movable plate (2); a first slide rail (11) is connected to the lower end of the movable plate (2); and a telescopic component is connected between the first slide rail (11) and the transmission plate (8); The bottom of the telescopic component is connected to a transmission roller (13), and a limiting plate (14) is provided on both sides of the support base (1). A limiting slide groove (15) is provided inside the limiting plate (14), and the transmission roller (13) extends inside the limiting slide groove (15); Support plates (16) are fixed to the front and rear sides of the support base (1), the upper end of the support plate (16) is connected to the transmission shaft (17), and cams (19) are connected to both sides of the transmission shaft (17), and sliding plates (21) are provided at the lower ends of the front and rear sides of the movable plate (2), and a transmission protrusion (22) is fixed on the inner side of the sliding plate (21), and a transmission vertical plate (23) is connected to the outer side of the sliding plate (21), and a transmission assembly is provided at the upper end of the support base (1), and the transmission assembly is connected to the transmission vertical plate (23), and the positions of the transmission vertical plate (23) and the transmission protrusion (22) can be changed to realize the change of the vibration direction of the support plate (3).

2. The device for detecting seismic performance of a building structure according to claim 1, characterized in that: An "L"-shaped limiting block (4) is fixed to the upper end of the support plate (3), and the limiting block (4) can limit the placement position of the building structure model during installation. The limiting blocks (4) are distributed in a ring array with the center point of the support plate (3) as the axis. Holes are arranged in an array on the surface of the support plate (3) for bolt connection when installing the building structure model.

3. The device for detecting seismic performance of a building structure according to claim 2, wherein: The outer wall of the support plate (3) is provided with a groove, and a driven gear ring (7) is connected inside the groove. A first motor (5) is provided at the upper right end of the movable plate (2), and the lower end of the first motor (5) is suspended and fixed above the movable plate (2) through a mounting frame. A driving gear (6) is connected to the lower shaft end of the first motor (5), and the driving gear (6) extends into the groove and meshes with the driven gear ring (7). The rotation of the driving gear (6) can change the direction of the building structure model at the upper end of the support plate (3).

4. The device for detecting seismic performance of a building structure according to claim 1, wherein: The transmission shaft (17) is rotatably connected to the support plate (16), and the cams (19) are symmetrically distributed at both ends of the transmission shaft (17). A second motor (18) is fixed to the upper end of the front support plate (16), and the front shaft end of the second motor (18) is fixed to the transmission shaft (17). A second slide rail (20) is fixed to the lower end of the movable plate (2), and the sliding plate (21) is slidably connected to the second slide rail (20). The lower end of the sliding plate (21) is fixed to the transmission protrusion (22), and the lower end surface of the transmission protrusion (22) contacts the cam (19).

5. The device for detecting seismic performance of a building structure according to claim 1, characterized in that: The transmission vertical plate (23) is symmetrically arranged on the left and right sides of the cam (19), the lower end of the transmission vertical plate (23) is narrower than the upper end, the upper end of the support base (1) is slidably connected to a slider (24), and the upper end of the slider (24) is provided with a limiting groove (25), the lower end of the transmission vertical plate (23) extends into the limiting groove (25), and the transmission vertical plate (23) is slidably connected to the limiting groove (25), and the lower end of the support plate (16) is rotatably connected to a bidirectional screw rod (26), and the bidirectional screw rod (26) is threadedly connected to the slider (24).

6. The device for detecting seismic performance of a building structure according to claim 5, characterized in that: The rear ends of the bidirectional screw rod (26) and the transmission shaft (17) both extend to the rear end of the support plate (16); a first pulley (27) is fixed to the rear end of the bidirectional screw rod (26); a second pulley (28) is fixed to the rear end of the transmission shaft (17); and a transmission belt (29) is connected between the first pulley (27) and the second pulley (28).

7. The device for detecting seismic performance of a building structure according to claim 1, characterized in that: The lower end of the first slide rail (11) is slidably connected to a support sleeve (10), and the lower end of the support sleeve (10) is slidably connected to a support connecting rod (9), and the support connecting rod (9) is fixedly connected to the transmission plate (8). A return spring (12) is provided inside the support sleeve (10), and the upper and lower ends of the return spring (12) are respectively fixed to the inner wall of the support sleeve (10) and the support connecting rod (9).

8. The device for detecting seismic performance of a building structure according to claim 7, characterized in that: The transmission roller (13) is rotatably connected to the lower end of the support link (9), and a damping bearing is used to connect the transmission roller (13) and the support link (9). The diameter of the middle portion of the transmission roller (13) is smaller than that of the two sides, and the middle portion of the transmission roller (13) contacts the inner wall of the limiting slide groove (15), and the limiting slide groove (15) is designed in a wave shape.

9. The device for detecting seismic performance of a building structure according to claim 8, characterized in that: A transmission groove (30) is provided in the middle of the transmission plate (8), and the transmission groove (30) and the transmission vertical plate (23) form a locking structure.

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