Shear wall structure anti-seismic detection device

Abstract

This application belongs to the technical field of seismic testing equipment for walls, and discloses a seismic testing device for shear wall structures. This application includes a movable base. The beneficial effects of this utility model are: the drive motor drives the rotating disk to rotate through the first rotating rod, and the traveling rollers on the bottom surface of the movable plate roll along the arc-shaped block and cooperate with the first spring to elastically reset, which can generate regular vertical vibration; at the same time, the ball head rod on the side of the placement plate slides and abuts against the spherical protrusion of the second upright plate, and combined with the elastic drive of the spring telescopic rod, it can trigger lateral vibration, which solves the defect of traditional devices that only vibrate in one direction. It can reproduce the "vertical + lateral" combined load effect in earthquakes, ensure the accuracy of the test results, and thus further accurately evaluate the failure resistance of shear walls under combined loads.

Description

Technical Field

[0001] This utility model relates to the technical field of seismic testing equipment for walls, and in particular to a seismic testing device for shear wall structures. Background Technology

[0002] As a core component of a building's lateral force resisting system, the mechanical response of shear walls under seismic loads directly determines the structural safety of a building. Therefore, it is necessary to use professional seismic testing devices to simulate real earthquake effects and assess their resistance to deformation and damage. Currently, shear wall seismic testing devices are widely used in the engineering field. For example, the "Seismic Testing Device for Precast Concrete Wall Panels" disclosed in CN216594063U uses a fixing mechanism to easily fix the concrete wall panels and an adjustment mechanism to easily adjust the rotation angle of the precast concrete wall panels as needed, thereby improving the work efficiency of the users. However, the prior art only designed a vertical vibration simulation structure and did not design a horizontal vibration simulation structure, which could not reproduce the real earthquake conditions. This resulted in a large deviation between the test results and the actual seismic performance of the shear wall, and it was impossible to accurately assess its failure resistance under combined loads. Furthermore, in the prior art, the adjustment of the vertical vibration amplitude relied on replacing cams of different weights. If it was necessary to increase the amplitude, the original cams had to be removed and heavier accessories installed after stopping the machine, which was cumbersome and time-consuming. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a seismic testing device for shear wall structures. A drive motor rotates a rotating disk via a first rotating rod. Rollers on the bottom of the movable plate roll along an arc-shaped block and are elastically reset by a first spring, generating regular vertical vibrations. Simultaneously, a ball-head rod on the side of the placement plate slides against a spherical protrusion on the second vertical plate, triggering lateral vibrations in conjunction with the elastic drive of a spring-loaded telescopic rod. This overcomes the limitation of traditional devices that only vibrate in one direction, reproducing the combined vertical and lateral load effects during earthquakes, ensuring the accuracy of the test results, and thus enabling a more accurate assessment of the shear wall's resistance to failure under combined loads.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a seismic detection device for shear wall structure, including a movable base, a placement plate disposed above the movable base, and U-shaped seats symmetrically fixedly connected to the surface of the placement plate, wherein each U-shaped seat has a fastening bolt symmetrically threadedly connected to its surface. A rotating disk is provided above the movable base. The surface of the rotating disk has mounting slots arranged in a circular array. Each mounting slot has an adjustable arc-shaped block. Support rods are fixedly connected to the surface of the movable base in a rectangular array. A support plate is fixedly connected to the top of the support rods. A movable plate is provided above the support plate. T-shaped sliding rods are fixedly connected to the four corners of the bottom surface of the movable plate. The T-shaped sliding rods are slidably connected to the support plate. A convex strip is slidably connected to the surface of the movable plate. The convex strip is fixedly connected to the placement plate.

[0005] By adopting the above technical solution, the device is equipped with a "movable base" at the bottom, which can be flexibly moved according to the testing needs without fixed installation. "U-shaped seats + fastening bolts" are symmetrically arranged on the surface of the placement plate. The shear wall specimen can be directly clamped on both sides by tightening the bolts. With the wrapping structure of the U-shaped seats, the lateral movement of the specimen can be effectively restricted during vibration. The rotating disk surface has "installation slots + adjustable angle arc blocks" in a circular array. The rotation of the rotating disk drives the movement of the arc blocks. The vibration amplitude can be changed by adjusting the angle of the arc blocks. It can also be used with subsequent drive components (such as motors) to achieve "vertical + lateral" synchronous vibration. This solves the defects of traditional devices that can only vibrate in one direction and cannot reproduce real earthquake composite loads. The test results are more in line with the actual working conditions.

[0006] Furthermore, a first rotating rod is fixedly connected to the center of the bottom surface of the rotating disk, and a drive motor is fixedly installed on the surface of the movable base. The first rotating rod and the output shaft of the drive motor are fixedly connected.

[0007] By adopting the above technical solution, the drive motor drives the first rotating rod to directly drive the rotating disk. By precisely controlling the motor speed and direction, the rotation speed and angle of the rotating disk can be adjusted synchronously. In turn, in conjunction with the arc block on the rotating disk, precise synchronous control of the vertical and horizontal vibration frequency and phase can be achieved, solving the problem of "vibration asynchrony" that is easy to occur in traditional multi-motor independent drive, and providing stable power support for simulating the synchronous action of multi-directional loads in real earthquakes.

[0008] Furthermore, a limiting annular groove is formed on the circumferential surface of the rotating disk, and L-shaped rods are fixedly connected to the surface of the movable base in a circular array. The ends of the L-shaped rods are fixedly connected to limiting rollers with built-in U-shaped blocks, and the limiting rollers are tumbling and inserted into the limiting annular groove.

[0009] By adopting the above technical solution, radial constraints can be formed from multiple directions (circular array arrangement) around the outer periphery of the rotating disk, effectively limiting the radial movement of the rotating disk during high-speed rotation or vibration, ensuring that the rotating disk always rotates stably along the preset axis, avoiding distortion of the vibration direction of components such as arc blocks due to radial offset, and improving the accuracy of multi-directional vibration simulation.

[0010] Furthermore, a traveling roller with a built-in U-shaped block is fixedly connected to the bottom surface of the T-shaped slide rod, and a first spring sleeved on the surface of the T-shaped slide rod is fixedly connected between the T-shaped slide rod and the support plate.

[0011] By adopting the above technical solution, when the traveling roller falls from the surface of the arc-shaped block, the first spring can quickly release its elastic potential energy by utilizing its own elastic deformation, pushing the T-shaped slide rod to drive the movable plate (and the shear wall specimen above it) to generate obvious downward vibration, simulating the impact vibration under seismic load. Moreover, the first spring can quickly reset the T-shaped slide rod after the traveling roller falls, so that the first roller can re-contact the next arc-shaped block and complete the "lift-fall" action again, forming a continuous and regular vibration cycle. This avoids the vibration interruption caused by the traveling roller not being able to reset after falling, ensuring the stability and continuity of vibration simulation in seismic testing.

[0012] Furthermore, one side of the arc-shaped block is rotatably inserted into the mounting groove via a rotating shaft, and a first U-shaped ear is fixedly connected to the bottom surface of the other side of the arc-shaped block. An adjusting rod is rotatably connected to the inner wall surface of the first U-shaped ear, and a second U-shaped ear is rotatably sleeved at the bottom end of the adjusting rod. An electric push rod is symmetrically fixedly installed on the bottom surface of the rotating disk, and a moving ring is fixedly sleeved on the surface of the electric push rod. The second U-shaped ear and the moving ring are fixedly connected.

[0013] By adopting the above technical solution, the electric push rod extends and retracts, driving the moving ring to move, which in turn pushes the first U-shaped ear, thereby driving the arc block to rotate around the axis. This allows for precise changes in the tilt angle of the arc block (such as increasing or decreasing the protrusion height of the arc block). When the traveling roller rolls along the arc block at different angles, it generates different lifting heights and falling distances, thus achieving flexible adjustment of the vibration amplitude without the need to replace the arc block, improving detection efficiency. At the same time, the rotating connection between the adjusting rod and the first and second U-shaped ears, combined with the stable rotation of the arc block around the axis, ensures that there is no jamming or deviation during the adjustment of the arc block angle, ensuring the stability of the motion trajectory when the traveling roller contacts the arc block, thereby improving the amplitude and frequency accuracy of subsequent vibration simulation.

[0014] Furthermore, the contact surface of the arc-shaped block is processed by precision grinding, and its surface is free of obvious scratches, burrs and uneven defects.

[0015] By adopting the above technical solution, it can be ensured that the walking roller rolls without obstruction on the surface of the arc block, thus ensuring the smooth progress of the inspection.

[0016] Furthermore, a first upright plate and a second upright plate are fixedly connected to the surface of the movable base. A spring telescopic rod is symmetrically fixedly connected to the side surface of the placement plate near the first upright plate. A spherical slider is fixedly connected to the end of the spring telescopic rod. A ball-head rod is symmetrically fixedly connected to the side surface of the placement plate near the second upright plate. A plurality of spherical protrusions are fixedly connected at equal intervals to the surface of the second upright plate. The ball-head rod and the spherical protrusions slide against each other.

[0017] By adopting the above technical solution, when the ball joint contacts the spherical protrusion and generates a lateral force, the spring telescopic rod can provide a lateral elastic driving force for the placement plate through its own stretching or compression deformation. This allows the placement plate to actively generate lateral vibration as the ball joint contacts and disengages from the protrusion. At the same time, the elastic reset characteristic of the spring telescopic rod can quickly pull or push the placement plate back to its original position after the ball joint disengages from the previous spherical protrusion, ensuring that the ball joint can smoothly contact the next spherical protrusion, forming a continuous lateral vibration cycle. This avoids vibration interruption due to reset lag and ensures the continuity of lateral vibration simulation.

[0018] In summary, this utility model has the following beneficial effects: 1. In this application, the drive motor drives the rotating disk to rotate through the first rotating rod. The traveling rollers on the bottom surface of the movable plate roll along the arc-shaped block and are elastically reset with the first spring, which can generate regular vertical vibration. At the same time, the ball head rod on the side of the placement plate slides and abuts against the spherical protrusion of the second vertical plate. Combined with the elastic drive of the spring telescopic rod, it can trigger lateral vibration, which solves the defect of traditional devices that only vibrate in one direction. It can reproduce the "vertical + lateral" combined load effect in earthquakes, ensure the accuracy of the test results, and thus further accurately evaluate the failure resistance of shear walls under combined loads. 2. In this application, the electric push rod extends and retracts to drive the adjusting rod to push the arc block to rotate around the axis, which can accurately change the tilt angle of the arc block, thereby adjusting the lifting height of the walking roller and the vertical vibration amplitude; it can simulate different vibration intensities without disassembling or replacing core components, saving time and effort and improving detection adaptability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the support plate, T-shaped slide bar, and movable plate in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the rotating disk, the traveling roller, and the moving ring in an embodiment of this utility model; Figure 5This is a schematic diagram of the structure of the arc-shaped block, adjusting rod, and moving ring according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the spherical slider, ball head rod, and spherical protrusion in an embodiment of this utility model.

[0020] In the diagram: 1. Movable base; 2. Drive motor; 3. First rotating rod; 4. Rotating disk; 5. Mounting slot; 6. Arc-shaped block; 7. First U-shaped ear; 8. Electric push rod; 9. Moving ring; 10. Second U-shaped ear; 11. Adjusting rod; 12. Limiting ring groove; 13. L-shaped rod; 14. Limiting roller; 15. First spring; 16. T-shaped slide bar; 17. Traveling roller; 18. Support plate; 19. Support rod; 20. Movable plate; 21. First upright plate; 22. Second upright plate; 23. Spring telescopic rod; 24. Spherical slider; 25. Ball head rod; 26. Spherical protrusion; 27. Convex strip; 28. Placement plate; 29. ​​U-shaped seat; 30. Fastening bolt. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] like Figure 1-6 As shown in the figure, this application discloses a seismic testing device for shear wall structure, including a movable base 1, a placement plate 28 disposed above the movable base 1, and U-shaped seats 29 symmetrically fixedly connected to the surface of the placement plate 28. Each U-shaped seat 29 has a fastening bolt 30 symmetrically threadedly connected to its surface. A rotating disk 4 is provided above the movable base 1. The surface of the rotating disk 4 has mounting slots 5 arranged in a circular array. Each mounting slot 5 is provided with an adjustable arc block 6. The surface of the movable base 1 is fixedly connected to a support rod 19 in a rectangular array. The top of the support rod 19 is fixedly connected to a support plate 18. A movable plate 20 is provided above the support plate 18. T-shaped sliding rods 16 are fixedly connected to the four corners of the bottom surface of the movable plate 20. The T-shaped sliding rods 16 and the support plate 18 are slidably connected. A convex strip 27 is slidably connected to the surface of the movable plate 20. The convex strip 27 and the placement plate 28 are fixedly connected.

[0023] In use, the shear wall specimen to be tested is first placed on the surface of the placement plate 28 and initially positioned by the symmetrically arranged U-shaped seats 29. Then, the fastening bolts 30 on the surface of the U-shaped seats 29 are rotated, and the specimen is clamped from both sides by the thread pushing force of the fastening bolts 30. Combined with the wrapping constraint of the U-shaped seats 29, the specimen is stably fixed. Then, the rotating disk 4 is controlled to rotate, and the arc-shaped block 6 in the mounting groove 5 on its surface moves together and pushes the movable plate 20 upward. The T-shaped sliding rod 16 on the bottom surface of the movable plate 20 slides and engages with the support plate 18 at the top of the support rod 19, providing vertical guidance for the movable plate 20. Combined with the periodic pushing of the arc-shaped block 6, vertical vibration is generated. At the same time, the convex strip 27 (fixed to the placement plate 28) slidably connected to the surface of the movable plate 20 drives the placement plate 28 to slide laterally along the movable plate 20 when the device generates a lateral force. The vertical vibration is superimposed to realize the "vertical + lateral" composite seismic load simulation, which acts on the specimen, making the vibration simulation close to the real seismic conditions and ensuring the reliability of the test data.

[0024] Furthermore, a first rotating rod 3 is fixedly connected to the center of the bottom surface of the rotating disk 4, and a drive motor 2 is fixedly installed on the surface of the movable base 1. The first rotating rod 3 and the output shaft of the drive motor 2 are fixedly connected.

[0025] When in use, the drive motor 2 is started, and the rotational power of the drive motor 2 is directly transmitted to the rotating disk 4 through the first rotating rod 3, causing the rotating disk 4 to rotate synchronously, providing the power foundation for the subsequent vibration simulation of the device. The coaxial fixed connection of the drive motor 2, the first rotating rod 3 and the rotating disk 4 allows the power to be transmitted accurately along the fixed axis, avoiding the offset problem of non-coaxial transmission, ensuring the stability of the rotation trajectory of the rotating disk 4, laying the foundation for the accuracy of vibration simulation. Moreover, the rigid fixation of the three does not require additional intermediate transmission components, reducing failure points and wear, extending the life of the device and simplifying maintenance.

[0026] Furthermore, a limiting ring groove 12 is provided on the circumferential surface of the rotating disk 4, and L-shaped rods 13 are fixedly connected to the surface of the movable base 1 in a circular array. The end of the L-shaped rods 13 is fixedly connected to a limiting roller 14 with a built-in U-shaped block, and the limiting roller 14 is rolled and inserted into the limiting ring groove 12.

[0027] When the drive motor 2 drives the rotating disk 4 to rotate via the first rotating rod 3, the end of the L-shaped rod 13 fixed in a circular array on the surface of the movable base 1, with its own U-shaped block, has a limiting roller 14 that always rolls within the limiting ring groove 12 on the circumference of the rotating disk 4, thus constraining the rotation trajectory of the rotating disk 4. The L-shaped rod 13 in the circular array, together with the limiting roller 14 and the limiting ring groove 12, can restrict the radial movement of the rotating disk 4 from multiple points on its outer circumference, preventing the rotating disk 4 from deviating due to centrifugal force or power fluctuations during rotation, ensuring that the rotating disk 4 always rotates stably along the preset axis, further improving the accuracy of the subsequent arc block 6 pushing the movable plate 20 to generate vibration. At the same time, the rolling action of the limiting roller 14 can reduce frictional wear with the limiting ring groove 12, extend the service life of the components, and require no additional maintenance, ensuring the long-term stable operation of the device.

[0028] Furthermore, a traveling roller 17 with a built-in U-shaped block is fixedly connected to the bottom surface of the T-shaped slide rod 16, and a first spring 15 sleeved on the surface of the T-shaped slide rod 16 is fixedly connected between the T-shaped slide rod 16 and the support plate 18.

[0029] When the rotating disk 4 drives the arc-shaped block 6 to rotate, the surface of the arc-shaped block 6 will contact the traveling roller 17 with the U-shaped block on the bottom surface of the T-shaped slide rod 16 and push it to move upward. The T-shaped slide rod 16 then slides along the support plate 18. At the same time, the first spring 15, which is sleeved on the surface of the T-shaped slide rod 16 and connects the T-shaped slide rod 16 and the support plate 18, is stretched. When the traveling roller 17 moves with the T-shaped slide rod 16 to the point of disengaging from the surface of the arc-shaped block 6, the first spring 15 releases its elastic potential energy, pulling the T-shaped slide rod 16 and the traveling roller 17 back to their original positions, forming a periodic up-and-down movement. The rolling action of the traveling roller 17 can reduce frictional wear with the surface of the arc-shaped block 6, extend the life of the component, and make the up-and-down movement of the T-shaped slide rod 16 smoother. The elastic reset action of the first spring 15 can ensure the stable reset of the T-shaped slide rod 16, ensuring the continuity of subsequent vibration simulation. At the same time, the sliding action between the T-shaped slide rod 16 and the support plate 18 can limit the direction of movement, avoid deviation, and further improve the accuracy of vibration simulation.

[0030] Furthermore, one side of the arc-shaped block 6 is rotatably inserted into the mounting groove 5 via a rotating shaft, and the bottom surface of the other side of the arc-shaped block 6 is fixedly connected to a first U-shaped ear 7. The inner wall surface of the first U-shaped ear 7 is rotatably connected to an adjusting rod 11, and the bottom end of the adjusting rod 11 is rotatably sleeved with a second U-shaped ear 10. The bottom surface of the rotating disk 4 is symmetrically and fixedly installed with an electric push rod 8, and the surface of the electric push rod 8 is fixedly sleeved with a moving ring 9. The second U-shaped ear 10 and the moving ring 9 are fixedly connected.

[0031] During the testing process, the electric push rod 8, which is symmetrically fixed to the bottom of the rotating disk 4, can be activated according to the required vibration amplitude. The extension and retraction of the electric push rod 8 drives the moving ring 9, which is fixedly sleeved on its surface, to move synchronously. The second U-shaped ear 10, which is fixed to the moving ring 9, moves accordingly, thereby pulling or pushing the adjusting rod 11, which is rotatably sleeved with it. The adjusting rod 11, through its rotatable connection with the first U-shaped ear 7, drives the arc-shaped block 6 to rotate around the rotating shaft in the mounting groove 5, thereby changing the tilt angle of the arc-shaped block 6. The precise extension and retraction of the electric push rod 8 can achieve a slight adjustment of the angle of the arc-shaped block 6, thereby flexibly controlling the subsequent vibration amplitude and adapting to the simulation requirements of different earthquake intensities. The rotatable connection between the adjusting rod 11 and the first U-shaped ear 7 and the second U-shaped ear 10, as well as the cooperation between the arc-shaped block 6 and the rotating shaft of the mounting groove 5, can ensure that the angle adjustment process is smooth and without jamming. At the same time, the symmetrically arranged electric push rods 8 can make the arc-shaped block 6 bear the force evenly, avoiding structural deformation caused by unilateral force and ensuring the stable operation of the device.

[0032] It should be noted that the traveling roller 17 and the limiting roller 14 have similar structures, both including a U-shaped block, a rotating shaft and rollers. The rollers are rotatably connected inside the U-shaped block through the rotating shaft. The traveling roller 17 and the limiting roller 14 are fixedly connected to the T-shaped slide bar 16 and the L-shaped bar 13 respectively through the U-shaped block.

[0033] Furthermore, the contact surface of the arc-shaped block 6 is processed using a precision grinding process, and its surface is free of obvious scratches, burrs, and unevenness defects.

[0034] It can ensure that the walking roller 17 rolls unobstructed on the surface of the arc block 6, ensuring the smooth progress of the test.

[0035] Furthermore, a first upright plate 21 and a second upright plate 22 are fixedly connected to the surface of the movable base 1. A spring telescopic rod 23 is symmetrically fixedly connected to the surface of the placement plate 28 near the first upright plate 21. A spherical slider 24 is fixedly connected to the end of the spring telescopic rod 23. A ball-head rod 25 is symmetrically fixedly connected to the surface of the placement plate 28 near the second upright plate 22. A plurality of spherical protrusions 26 are fixedly connected at equal intervals to the surface of the second upright plate 22. The ball-head rod 25 and the spherical protrusions 26 slide against each other.

[0036] During the testing process, the placement plate 28 vibrates vertically along with the movable plate 20. Simultaneously, the ball-head rod 25 on the side of the placement plate 28 closest to the second vertical plate 22 slides against the spherical protrusion 26 on the surface of the second vertical plate 22, generating a lateral force during the contact, which pushes the placement plate 28 to move laterally. At this time, the spring telescopic rod 23 on the side of the placement plate 28 closest to the first vertical plate 21 stretches or compresses as the placement plate 28 moves. The spherical slider 24 at its end helps to limit the lateral movement trajectory. After the ball-head rod 25 disengages from the current spherical protrusion 26, the spring telescopic rod 23 releases its elastic potential energy to pull the placement plate 28 back to its original position. The ball-head rod 25 continues to contact the next spherical protrusion 26, forming periodic lateral vibration. The sliding contact between the ball-head rod 25 and the spherical protrusion 26, combined with the elastic return of the spring telescopic rod 23, can stably generate lateral vibration. Combined with vertical vibration, it realizes the simulation of composite seismic load, improving the realism of the test. Furthermore, the symmetrical fixation of the first vertical plate 21 and the second vertical plate 22 provides stable support for the lateral vibration structure, ensuring the reliability of the device operation.

[0037] It should be noted that the spring telescopic rod 23 is a mechanical component with an integrated spring that can achieve telescopic function. The core consists of two parts: the telescopic rod body and the built-in spring. The rod body can slide along a preset trajectory. Its working principle is as follows: when subjected to external force, the telescopic rod body is stretched or compressed axially, and the built-in spring deforms synchronously and stores elastic potential energy. When the external force disappears, the spring releases the elastic potential energy and pushes the telescopic rod body back to its initial length, thereby realizing the cyclic action of "force-induced extension-automatic reset".

[0038] The operating principle of the seismic testing device for shear wall structures in this embodiment is as follows: First, place the shear wall specimen to be tested on the surface of the placement plate 28. Use the U-shaped seats 29 symmetrically fixed on the placement plate 28 to initially position the specimen. Then rotate the fastening bolts 30 on the surface of the U-shaped seats 29 and clamp the specimen from both sides by the thread pushing force of the bolts to ensure that the specimen is firmly fixed and avoids displacement during testing. Then, the drive motor 2 fixed on the surface of the movable base 1 can be started. Its output shaft drives the rotating disk 4 to rotate through the first rotating rod 3 fixed on the same axis. The limiting ring groove 12 on the circumferential surface of the rotating disk 4 rolls with the end of the L-shaped rod 13 in the circular array on the surface of the movable base 1 and the limiting roller 14 with its own U-shaped block. The rotating disk 4 is constrained from radial movement from multiple points on the outer periphery to ensure that the rotating disk 4 rotates stably along the preset axis and avoids deviation caused by power fluctuations. When the rotating disk 4 drives the arc-shaped block 6 to rotate, the arc-shaped block 6 contacts the bottom end of the T-shaped slide rod 16 on the bottom surface of the movable plate 20 and the traveling roller 17 with its own U-shaped block, pushing it upward. The T-shaped slide rod 16 slides along the support plate 18 (the support plate 18 is fixed on the movable base 1 by the support rods 19 of the rectangular array, providing stable support). At the same time, the first spring 15, which is sleeved on the surface of the T-shaped slide rod 16 and connects the T-shaped slide rod 16 and the support plate 18, is stretched. After the traveling roller 17 is disengaged from the arc-shaped block 6, the first spring 15 releases its elastic potential energy to pull the T-shaped slide rod 16 and the movable plate 20 back to their original positions, forming periodic vertical vibration. During this process, if it is necessary to adjust the vibration amplitude, the electric push rod 8, which is symmetrically fixed on the bottom of the rotating disk 4, can be activated. The extension and retraction of the electric push rod 8 drives the moving ring 9, which is fixed on the surface, to move. Then, through the rotational cooperation of the second U-shaped ear 10, the adjusting rod 11 and the first U-shaped ear 7, the arc block 6 is driven to rotate around the rotating shaft to adjust the tilt angle (the contact surface of the arc block 6 is precisely polished to reduce subsequent frictional loss). While vertical vibration is being performed, the ball-head rod 25 on the side of the placement plate 28 near the second vertical plate 22 (fixed on the movable base 1) slides against the spherical protrusions 26 on the surface of the second vertical plate 22 at equal intervals, generating a lateral force to push the placement plate 28 to slide laterally along the convex strip 27. At the same time, the spring telescopic rod 23 on the side of the placement plate 28 near the first vertical plate 21 (fixed on the movable base 1) is stretched or compressed, and the spherical slider 24 at its end helps to limit the lateral movement trajectory. After the ball-head rod 25 disengages from the current spherical protrusion 26, the spring telescopic rod 23 releases elastic potential energy to pull the placement plate 28 back to its original position. The ball-head rod 25 continues to abut against the next spherical protrusion 26, forming periodic lateral vibration, and finally realizing the simulation of "vertical + lateral" composite seismic load, completing the seismic performance test of the shear wall specimen. Throughout the process, the components work together to ensure accurate and stable detection: the coaxial fixation of the drive motor 2, the first rotating rod 3, and the rotating disk 4 ensures accurate power transmission; the limiting roller 14 and the limiting ring groove 12 work together to enhance the stability of the rotating disk 4; the T-shaped slide rod 16 and the convex strip 27 respectively constrain the vertical and horizontal movement trajectories; the spring telescopic rod 23 and the first spring 15 achieve stable reset; and the precision-polished surface of the arc block 6 reduces wear. Together, they improve the reliability of the detection data and the service life of the device. Furthermore, the device can be adapted to different seismic intensity detection requirements by adjusting the speed of the electric push rod 8 and the drive motor 2, thus enhancing the device's versatility.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A seismic testing device for shear wall structure, comprising a movable base (1) and a placement plate (28) disposed above the movable base (1) and U-shaped seats (29) symmetrically fixedly connected to the surface of the placement plate (28), wherein each U-shaped seat (29) is symmetrically threaded with fastening bolts (30). Its characteristics are: A rotating disk (4) is provided above the movable base (1). The surface of the rotating disk (4) is provided with mounting slots (5) in a circular array. Each mounting slot (5) is provided with an adjustable angle arc block (6). The surface of the movable base (1) is fixedly connected with a support rod (19) in a rectangular array. The top of the support rod (19) is fixedly connected with a support plate (18). A movable plate (20) is provided above the support plate (18). T-shaped sliding rods (16) are fixedly connected at the four corners of the bottom surface of the movable plate (20). The T-shaped sliding rods (16) and the support plate (18) are slidably connected. A convex strip (27) is slidably connected to the surface of the movable plate (20). The convex strip (27) and the placement plate (28) are fixedly connected.

2. The seismic testing device for shear wall structures according to claim 1, characterized in that: A first rotating rod (3) is fixedly connected to the center of the bottom surface of the rotating disk (4), and a drive motor (2) is fixedly installed on the surface of the movable base (1). The first rotating rod (3) and the output shaft of the drive motor (2) are fixedly connected.

3. The seismic testing device for shear wall structures according to claim 1, characterized in that: The rotating disk (4) has a limiting ring groove (12) on its circumference. The surface of the movable base (1) is fixedly connected with an L-shaped rod (13) in a circular array. The end of the L-shaped rod (13) is fixedly connected with a limiting roller (14) with a U-shaped block. The limiting roller (14) is rolled and inserted into the limiting ring groove (12).

4. The seismic testing device for shear wall structures according to claim 1, characterized in that: The bottom surface of the T-shaped slide bar (16) is fixedly connected to a walking roller (17) with a U-shaped block, and a first spring (15) sleeved on the surface of the T-shaped slide bar (16) is fixedly connected between the T-shaped slide bar (16) and the support plate (18).

5. The seismic testing device for shear wall structures according to claim 1, characterized in that: One side of the arc-shaped block (6) is rotatably inserted into the mounting groove (5) via a rotating shaft. The bottom surface of the other side of the arc-shaped block (6) is fixedly connected to a first U-shaped ear (7). An adjusting rod (11) is rotatably connected to the inner wall of the first U-shaped ear (7). The bottom end of the adjusting rod (11) is rotatably sleeved with a second U-shaped ear (10). An electric push rod (8) is symmetrically fixedly installed on the bottom surface of the rotating disk (4). A moving ring (9) is fixedly sleeved on the surface of the electric push rod (8). The second U-shaped ear (10) and the moving ring (9) are fixedly connected.

6. The seismic testing device for shear wall structures according to claim 5, characterized in that: The contact surface of the arc-shaped block (6) is processed by precision grinding, and its surface is free of obvious scratches, burrs and uneven defects.

7. The seismic testing device for shear wall structures according to claim 1, characterized in that: The movable base (1) is fixedly connected to a first upright plate (21) and a second upright plate (22). The placement plate (28) is symmetrically fixedly connected to a spring telescopic rod (23) on the side surface near the first upright plate (21). The end of the spring telescopic rod (23) is fixedly connected to a spherical slider (24). The placement plate (28) is symmetrically fixedly connected to a ball head rod (25) on the side surface near the second upright plate (22). The surface of the second upright plate (22) is fixedly connected to multiple spherical protrusions (26) at equal intervals. The ball head rod (25) and the spherical protrusions (26) slide against each other.

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