A seismic test device for civil engineering structures

Abstract

This utility model provides a seismic testing device for civil engineering structures, relating to the field of civil engineering. It includes a testing platform with a movable vibration platform inside. A fixed plate is fixedly connected inside the testing platform, and a transmission mechanism is installed inside the testing platform. The transmission mechanism includes a drive turntable and a lifting plate. A set of limiting slides is fixedly connected to the top surface of the drive turntable, and a set of transmission rods is fixedly connected to the bottom surface of the lifting plate. By incorporating components such as the vibration platform, support legs, a transverse sliding plate, and the transmission mechanism, this application enables the device to drive lateral vibration while simultaneously vibrating longitudinally. This allows the vibration platform to conduct synchronous vibration tests in two directions, significantly improving the realism of earthquake simulation. It facilitates a comprehensive evaluation of the seismic performance of structures in different directions, resulting in more comprehensive and reliable experimental data and improving the accuracy of seismic performance assessment.

Description

Technical Field

[0001] This utility model relates to a seismic testing device, specifically a seismic testing device for civil engineering structures, belonging to the field of civil engineering technology. Background Technology

[0002] Seismic testing of civil engineering structures refers to obtaining structural performance under seismic loading conditions through testing methods, including both linear dynamic characteristics and inelastic properties. Seismic testing can provide various information, such as bearing capacity, stiffness, deformation capacity, energy dissipation capacity, and damage characteristics, which can, to a certain extent, help infer the seismic performance of a structure and improve its seismic design measures.

[0003] According to patent number CN215524991U, a seismic testing device for civil engineering structures is disclosed, which includes a vibrating shell. The vibrating shell includes an aftershock vibrating rod, a vibrating platform, a main vibrating rod, a hydraulic tank, a sample clamping mechanism, and a rotating observation mechanism. The aftershock vibrating rod is fixedly connected to both ends of the inner side of the vibrating shell, and the vibrating platform is fixedly connected to one side of the aftershock vibrating rod.

[0004] The above-mentioned scheme can adjust the vibration frequency according to the hydraulic box during implementation, thereby simulating earthquakes of various levels, greatly enhancing the accuracy of the experiment and ensuring its applicability to various experimental needs. However, the above-mentioned scheme can only conduct longitudinal vibration tests during implementation, while earthquakes generate vibrations in both longitudinal and transverse directions. A single vibration input method is difficult to accurately reflect the seismic performance of the project, resulting in poor test accuracy. Therefore, we provide a seismic testing device for civil engineering structures to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a seismic testing device for civil engineering structures to solve the above-mentioned problems, thereby addressing the issue that in the prior art, it is difficult to simultaneously simulate earthquake movements from two directions when conducting seismic tests on civil engineering structures, which reduces the accuracy of the test.

[0006] This utility model is achieved through the following technical solution: a seismic testing device for civil engineering structures, comprising a test platform, a vibration platform movably arranged inside the test platform, a fixed plate fixedly connected inside the test platform, a transmission mechanism arranged inside the test platform, the transmission mechanism comprising a drive turntable and a lifting plate, a set of limiting slides fixedly connected to the top surface of the drive turntable, a set of transmission rods fixedly connected to the bottom surface of the lifting plate, a pulley fixedly installed at the bottom end of each transmission rod, two sliding grooves opened on the top surface of the lifting plate, two sliding plates fixedly connected to the bottom surface of the vibration platform, and two transmission plates fixedly connected to the outer surface of the vibration platform.

[0007] Preferably, each of the transmission rods passes through the fixed plate and is slidably connected to the fixed plate, the pulley is adapted to the limiting slide, the slide plate slides inside the slide groove, and the transmission rod plays a transmission role.

[0008] Preferably, the test platform is provided with a support plate inside, and a set of support legs are fixedly connected to the bottom surface of the support plate. Each support leg is fixedly connected to the test platform and serves to support the support plate.

[0009] Preferably, the support plate is rotatably connected to the drive turntable, and a servo motor and a gearbox are fixedly installed inside the test platform. A rotating rod is fixedly connected to the output end of the gearbox, and the rotating rod plays the role of changing the power transmission angle.

[0010] Preferably, the rotating rod passes through the support disk and is rotatably connected to the support disk, and the top end of the rotating rod is fixedly connected to the drive turntable, providing power for the rotation of the drive turntable.

[0011] Preferably, the top surface of the test platform is fixedly connected with a transverse sliding plate one and a transverse sliding plate two, and the two transmission plates are slidably connected to the transverse sliding plate one and the transverse sliding plate two respectively, so that the transmission plates can push the vibration platform to move laterally.

[0012] Preferably, the outer surface of the test platform is provided with heat dissipation windows, and a controller is fixedly installed on the outer surface of the test platform, which facilitates the operation of the device by the test personnel.

[0013] This utility model provides a seismic testing device for civil engineering structures, which has the following beneficial effects: This application, by setting up components such as a vibration platform, support legs, a transverse plate, and a transmission mechanism, enables the device to drive transverse vibration while vibrating longitudinally. This allows the vibration platform to conduct synchronous vibration tests in two directions, greatly improving the simulation realism of earthquakes. It facilitates a comprehensive evaluation of the seismic performance of structures in different directions, resulting in more comprehensive and reliable experimental data and improving the accuracy of seismic performance assessment.

[0014] This application, through the arrangement of components such as a drive turntable, lifting plate, limiting slide, and pulleys, allows the drive turntable to rotate, which in turn drives the pulleys to reciprocate up and down via the limiting slide, thereby causing the transmission rod to slide back and forth inside the fixed plate. This, in turn, drives the vibration platform to vibrate longitudinally, facilitating the evaluation of the axial forces borne by the vertical components of the structure. Furthermore, the arrangement of the transmission plate, transverse plate one, and transverse plate two allows the longitudinal vibration test of the vibration platform to drive its transverse vibration, thus enabling a comprehensive seismic test of the structure. This simplifies the power structure of the device and improves the simulation accuracy of the test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial cross-sectional view of the test platform of this utility model; Figure 3 This is a schematic diagram of the internal structure of the test platform of this utility model; Figure 4 This is an exploded view of the transmission mechanism of this utility model; Figure 5 This is a partial structural cross-sectional view of the transmission mechanism of this utility model.

[0016] [Explanation of Key Component Symbols] 1. Test platform; 2. Vibration platform; 3. Fixing plate; 4. Transmission mechanism; 401. Drive turntable; 402. Lifting plate; 403. Limit slide; 404. Transmission rod; 405. Pulley; 406. Slide groove; 407. Slide plate; 408. Transmission plate; 5. Support plate; 6. Support leg; 7. Servo motor; 8. Gearbox; 9. Rotary rod; 10. Horizontal sliding plate one; 11. Horizontal sliding plate two; 12. Heat dissipation window; 13. Controller. Detailed Implementation

[0017] This utility model provides a seismic testing device for civil engineering structures.

[0018] Please see Figure 1 and Figure 2 The test platform 1 provides a stable installation and support space for the test device. The structural components shown in the accompanying drawings are all illustrative examples. The specific real-time configuration should be adapted and optimized by considering the functional requirements, assembly conditions and process limitations in the actual application scenario, and adjusting the structural parameters, dimensions and connection methods accordingly.

[0019] The outer surface of the test platform 1 is provided with heat dissipation windows 12, and a controller 13 is fixedly installed on the outer surface of the test platform 1. The heat dissipation windows 12 can provide a heat dissipation channel for the operation of the internal equipment of the test platform 1, so as to avoid the high temperature generated by the electrical equipment in the test platform 1 during operation and affect the normal use of the equipment. The controller 13 facilitates the operation of the device by the test personnel, and can change the operating parameters of each electrical device according to the test requirements, so that the device can simulate different earthquake intensities. The controller 13, servo motor 7 and gearbox 8 are all existing technologies. The specific models and parameters should be based on actual needs. They will not be described in detail in this application.

[0020] Please see Figure 2 , Figure 3 and Figure 4The test platform 1 is equipped with a support plate 5 inside. The support plate 5 is rotatably connected to the drive turntable 401. A set of support legs 6 are fixedly connected to the bottom surface of the support plate 5. Each support leg 6 is fixedly connected to the test platform 1. The support legs 6 provide stable support for the use of the support plate 5. The support plate 5 can support the rotation of the drive turntable 401 and ensure the stable transmission of the transmission mechanism 4.

[0021] The test platform 1 is internally equipped with a servo motor 7 and a gearbox 8. The output end of the gearbox 8 is fixedly connected to a rotating rod 9, which passes through the support plate 5 and is rotatably connected to the support plate 5. The top end of the rotating rod 9 is fixedly connected to the drive turntable 401. The output shaft of the servo motor 7 is fixedly connected to the input end of the gearbox 8. When the servo motor 7 is started, it can drive the input end of the gearbox 8 to rotate. The gearbox 8 can transmit the rotation of the output shaft of the servo motor 7 to the rotating rod 9, causing the rotating rod 9 to rotate accordingly, thus providing power for the device to simulate an earthquake.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The test platform 1 is equipped with a vibration platform 2, and a fixed plate 3 is fixedly connected inside the test platform 1. The vibration platform 2 is used to support the civil engineering structure. When the device is started, the vibration platform 2 will vibrate longitudinally and laterally under the transmission action of the transmission mechanism 4, thereby conducting vibration tests on the civil engineering structure placed inside, which makes it convenient for the experimenters to infer the seismic performance of the structure. The fixed plate 3 is used to limit and support the transmission of the transmission rod 404, and plays a role in improving the transmission stability of the transmission mechanism 4.

[0023] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 The test platform 1 is equipped with a transmission mechanism 4, which includes a drive turntable 401 and a lifting plate 402. Through the transmission mechanism 4, the drive turntable 401 rotates and drives the vibration platform 2 to vibrate longitudinally via the limiting slide 403 and the transmission rod 404. Meanwhile, the transmission plate 408, the first transverse plate 10, and the second transverse plate 11 drive the vibration platform 2 to move laterally according to the vibration amplitude. This allows the vibration platform 2 to conduct synchronous vibration tests in two directions, greatly improving the simulation realism of earthquakes and facilitating a comprehensive evaluation of the seismic performance of the structure in different directions. This results in more comprehensive and reliable experimental data and improves the accuracy of seismic performance evaluation.

[0024] A set of limiting slides 403 is fixedly connected to the top surface of the drive turntable 401, and a set of transmission rods 404 is fixedly connected to the bottom surface of the lifting plate 402. Each transmission rod 404 passes through the fixed plate 3 and is slidably connected to the fixed plate 3. A pulley 405 is fixedly installed at the bottom end of each transmission rod 404. The pulley 405 is adapted to the limiting slide 403. When the drive turntable 401 rotates, it can drive the limiting slide 403 to rotate. Since the bottom end of the pulley 405 is in contact with the drive turntable 401, when the drive turntable 401 rotates, it can push the pulley 405 to move up and down through the limiting slide 403, thereby driving the transmission rod 404 to slide back and forth inside the fixed plate 3, and thus driving the vibration platform 2 to vibrate in the longitudinal direction. This facilitates the device to evaluate the axial force borne by the vertical components of the structure. The height of the limiting slide 403 is proportional to the longitudinal amplitude of the vibration platform 2.

[0025] Please see Figure 4 and Figure 5 The top surface of the lifting plate 402 has two sliding grooves 406, and the bottom surface of the vibration platform 2 is fixedly connected to two sliding plates 407. The sliding plates 407 slide inside the sliding grooves 406. Both the sliding grooves 406 and the sliding plates 407 are T-shaped, which can provide stable limiting and support for the lateral sliding of the vibration platform 2, ensuring the stability of the device in simulating lateral vibration. The length of the sliding grooves 406 must exceed the length of the sliding plates 407 to facilitate the lateral sliding of the vibration platform 2 on the top surface of the lifting plate 402.

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 Two transmission plates 408 are fixedly connected to the outer surface of the vibration platform 2. A transverse sliding plate 10 and a transverse sliding plate 2 11 are fixedly connected to the top surface of the test platform 1. The two transmission plates 408 are slidably connected to the transverse sliding plate 10 and the transverse sliding plate 2 11, respectively. Rollers are provided at the ends of the transmission plates 408 to reduce friction with either the transverse sliding plate 10 or the transverse sliding plate 2 11. The transverse sliding plate 10 and the transverse sliding plate 2 11 have opposite inclined surfaces. When the vibration platform 2 vibrates longitudinally, the two transmission plates 408 reciprocate upwards and downwards. Under the action of the transverse sliding plate 2 11, the vibration... When the moving platform 2 rises, it moves laterally along the inclined surface of the transverse sliding plate 11. When the vibrating platform 2 falls, it returns to its original position along the inclined surface of the transverse sliding plate 10. That is, the lifting and lowering of the vibrating platform 2 can drive the vibrating platform 2 to vibrate laterally through the transmission plate 408, the transverse sliding plate 10, and the transverse sliding plate 11. This allows for the detection of horizontal displacement and torsion that may occur in the structure due to lateral vibration. Only by considering vibrations in both longitudinal and lateral directions can potential weak points in civil engineering structures be discovered, providing a scientific basis for the reinforcement and improvement of the structure.

[0027] Working principle: During use, the tester first places the civil engineering structure in the vibration platform 2, and then starts the device through the controller 13. The servo motor 7 starts and drives the rotating rod 9 to rotate inside the support plate 5 through the gearbox 8. The rotation of the rotating rod 9 drives the drive turntable 401 to rotate on the top surface of the support plate 5. The rotation of the drive turntable 401 drives the pulley 405 to rise and fall alternately through the limit slide 403, thereby causing the lifting plate 402 to rise and fall back and forth. The lifting plate 402 pushes the vibration platform 2 to rise and fall longitudinally. When the vibration platform 2 vibrates longitudinally, the two transmission plates 408 on its surface will also rise and fall accordingly. When the transmission plate 408 rises, it will be limited by the second transverse plate 11, causing the vibration platform 2 to move laterally. When the transmission plate 408 falls, it will be limited by the first transverse plate 10, pushing the vibration platform 2 to reset. This allows the vibration platform 2 to vibrate laterally while vibrating longitudinally, which facilitates the device to conduct more realistic seismic tests on the structure and improves the accuracy of the test evaluation.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for seismic testing of civil engineering structures, comprising a testing platform (1), characterized in that: The test platform (1) is equipped with a vibration platform (2) inside, a fixed plate (3) is fixedly connected inside the test platform (1), and a transmission mechanism (4) is provided inside the test platform (1). The transmission mechanism (4) includes a drive turntable (401) and a lifting plate (402). A set of limiting slides (403) are fixedly connected to the top surface of the drive turntable (401). A set of transmission rods (404) are fixedly connected to the bottom surface of the lifting plate (402). A pulley (405) is fixedly installed at the bottom end of each transmission rod (404). Two slide grooves (406) are opened on the top surface of the lifting plate (402). Two slide plates (407) are fixedly connected to the bottom surface of the vibration platform (2). Two transmission plates (408) are fixedly connected to the outer surface of the vibration platform (2).

2. A device for seismic testing of civil engineering structures according to claim 1, characterized in that: Each of the transmission rods (404) passes through the fixed plate (3) and is slidably connected to the fixed plate (3). The pulley (405) is adapted to the limiting slide (403). The slide plate (407) slides inside the slide groove (406).

3. A device for seismic testing of civil engineering structures according to claim 1, characterized in that: The test platform (1) is equipped with a support plate (5) inside. A set of support legs (6) are fixedly connected to the bottom surface of the support plate (5). Each support leg (6) is fixedly connected to the test platform (1).

4. A seismic testing apparatus for a civil engineering structure according to claim 3, wherein: The support plate (5) is rotatably connected to the drive turntable (401). The test platform (1) is fixedly installed with a servo motor (7) and a gearbox (8). The output end of the gearbox (8) is fixedly connected with a rotating rod (9).

5. A seismic testing apparatus for a civil engineering structure according to claim 4, wherein: The rotating rod (9) passes through the support plate (5) and is rotatably connected to the support plate (5). The top end of the rotating rod (9) is fixedly connected to the drive turntable (401).

6. A seismic testing device for a civil engineering structure according to claim 1, wherein: The top surface of the test platform (1) is fixedly connected with a transverse plate one (10) and a transverse plate two (11), and the two transmission plates (408) are slidably connected to the transverse plate one (10) and the transverse plate two (11) respectively.

7. A seismic testing device for civil engineering structures as claimed in claim 1, wherein: The outer surface of the test platform (1) is provided with a heat dissipation window (12), and a controller (13) is fixedly installed on the outer surface of the test platform (1).

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