Earthquake simulation vibration table considering influence of soil structure

Abstract

The utility model belongs to the field of vibration tables, particularly relates to an earthquake simulation vibration table considering the influence of a soil structure, and provides the following scheme aiming at the problems that the time for mounting and dismounting models is prolonged and the experiment flexibility and the working efficiency are reduced due to the fact that building models with different sizes cannot be quickly and conveniently clamped and fixed by the conventional vibration table. The device comprises a supporting table and a table base, four supporting bases are fixedly arranged at the bottom of the supporting table in a rectangular shape, and a vibration machine is fixedly arranged in the center of the top of the supporting table; the clamping assembly is arranged in the pedestal and is used for clamping a building model; the buffering assembly is arranged on the supporting base and used for buffering vibration generated when the device works. According to the utility model, through the arrangement of the clamping assembly, building models with different sizes can be rapidly and conveniently clamped and fixed, so that the time for mounting and dismounting the models is reduced, and the experiment flexibility and the working efficiency are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration tables, in particular to an earthquake simulation vibration table taking into account the influence of soil structure. Background Art

[0002] An earthquake simulation vibration table that takes into account the influence of soil structure is a device specifically used to simulate the impact of ground movement on buildings and infrastructure during an earthquake. This vibration table can simulate the dynamic response of different soil structures (such as sand, clay, rock, etc.) under earthquake action, thereby more accurately evaluating the seismic performance of buildings or structures during earthquakes.

[0003] Currently, existing earthquake simulation shaking tables are unable to quickly and conveniently clamp and fix building models of different sizes, which increases the time for installing and disassembling the models and reduces experimental flexibility and work efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art that building models of different sizes cannot be clamped and fixed quickly and conveniently, which increases the time for installing and disassembling the models and reduces the experimental flexibility and work efficiency, and to propose an earthquake simulation vibration table that takes the influence of soil structure into consideration.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An earthquake simulation shaking table considering the influence of soil structure, comprising:

[0007] A support platform and a base, wherein the bottom of the support platform is rectangular and fixedly provided with four support bases, and the top of the support platform is located at the center and fixedly provided with a vibrator;

[0008] A clamping assembly, which is disposed in the pedestal and is used to clamp the building model;

[0009] The buffer component is arranged on the support seat and is used to buffer the vibration generated when the buffer device is working.

[0010] In a possible design, the clamping assembly includes four rectangular slide grooves opened on the top of the pedestal, slides are slidably arranged inside the four slide grooves, a connecting column is fixedly arranged inside the pedestal, a linkage plate is rotatably arranged outside the connecting column, linkage rods are rotatably arranged at the four corners of the top of the linkage plate, and the four ends of the linkage rods are rotatably connected to the bottoms of the four slides, respectively, and connecting frames are fixedly arranged at the bottoms of two symmetrical slides, electric push rods are fixedly arranged on both sides of one of the connecting frames, and the output ends of the two electric push rods are fixedly arranged on both sides of the other connecting frame, and clamping blocks are fixedly arranged on the tops of the four slides.

[0011] In a possible design, the buffer assembly includes four top seats fixedly arranged at the bottom of four support seats, respectively, and the bottom of the four top seats is slidably provided with a base, and dampers are fixedly arranged inside the top seat and the base, the bottom of the damper is fixedly connected to the bottom wall of the base, the piston end of the damper is fixedly connected to the top wall of the top seat, and the outside of the damper is provided with a buffer spring located between the base and the top seat, the bottom end of the buffer spring is fixedly connected to the bottom wall of the base, and the top end of the buffer spring is fixedly connected to the top wall of the top seat.

[0012] In a possible design, the top of the support platform is rectangular and fixed with four universal seats three, the tops of the four universal seats three are hinged with second excitation actuators, the output ends of the four second excitation actuators are hinged with universal seats four, and the platform is fixedly set on the tops of the four universal seats four.

[0013] In a possible design, support frames are fixedly provided on both sides of the top of the support platform, a universal seat 1 is fixedly provided on the inner side of the two support frames, an excitation actuator No. 1 is hingedly provided at one end of the two universal seats 1, and a universal seat 2 is hingedly provided at the output ends of the two excitation actuators No. 1, and the two universal seats 2 are respectively fixedly provided on both sides of the platform.

[0014] In a possible design, the outsides of the four clamping blocks are all covered with anti-slip covers.

[0015] In a possible design, rubber pads are fixedly disposed on the bottoms of the four bases.

[0016] In the present application, when starting to use, the earthquake simulation vibration table is first installed on a flat and stable ground through a buffer assembly to ensure that the four support seats are evenly stressed and stably support the entire device. Then check whether all components are firmly installed, especially the clamping assembly, buffer assembly, excitation actuator and other key parts, and turn on the power of the device. Then prepare the building model to be tested, place the building model on the pedestal, and then start the two electric push rods. The output ends of the two electric push rods retract to drive the two connecting frames to move relative to each other. The two connecting frames drive the slides thereon to move synchronously while moving. While the slide moves, the linkage plate is driven to rotate on the connecting column through the linkage rod thereon. While the linkage plate rotates, it drives the other two linkage rods thereon to move synchronously. While the other two linkage rods move, they drive the two slides thereon to move synchronously, so that the four slides move inward synchronously. While the four slides move inward, they drive the clamping block to approach the building model and clamp it. Then observe the clamping position to ensure that the anti-slip sleeve on the clamping block is in close contact with the building model to prevent the building model from sliding or falling off during the simulated earthquake.

[0017] Then, according to the needs of the experiment, the vibration frequency, amplitude and other parameters of the vibration machine are set through the control system to simulate earthquakes of different intensities. At the same time, the output of the second excitation actuator and the first excitation actuator can be adjusted to simulate the influence of different soil structures on the propagation of seismic waves. Then the vibration machine is started to generate the set vibration, which is transmitted to the clamped building model through the base to simulate the influence of the earthquake on the building. During the simulation process, the dynamic response of the building model, such as displacement, acceleration, stress and other parameters, is observed and recorded. At the same time, during the simulation process, the vibration force generated will be transmitted to the top seat through the support platform and the support seat. At this time, the damper itself uses internal friction or resistance to slow down the movement of the device when it is vibrated, thereby effectively absorbing and slowing down the vibration amplitude and frequency generated by the device when it is working. The buffer spring is set on the outside of the damper, and through its own elastic principle, the vibration is buffered, which can further enhance the shockproof effect, reduce the vibration generated when the vibration table is working, and ensure the accuracy and safety of the experiment.

[0018] After the earthquake simulation, the experimental data, such as the displacement, acceleration and other parameters of the building model, are collected and recorded. The experimental data are analyzed to evaluate the seismic performance of the building model, providing an important reference for the design.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model, by setting the clamping assembly and extending and retracting the electric push rod, the connecting frame is driven to drive the linkage plate to rotate. The rotation of the linkage plate drives the four slides to slide in the slide groove through the linkage rod, so that the four clamping blocks are brought closer to the center to clamp the building model, so that building models of different sizes can be clamped and fixed quickly and conveniently, reducing the time for installing and disassembling the model, enhancing the flexibility of the experiment, and at the same time ensuring that the building model is stably fixed on the vibration table, reducing the movement or tilt of the model during the experiment, and ensuring the accuracy of the experiment;

[0021] The utility model provides a buffer component, which can effectively buffer and dissipate the vibration generated by the vibration table through the buffer component (including a damper and a buffer spring), reduce the amplitude and frequency of the vibration, reduce the vibration impact of the vibration table on the surrounding environment, ensure the accuracy and safety of the experiment, and at the same time, the buffer component flexibly connects the vibration table and the ground and dissipates energy, which can reduce the impact force and stress concentration on the ground structure, thereby reducing the risk of damage;

[0022] The utility model can quickly and conveniently clamp and fix building models of different sizes through the setting of the clamping components, thereby reducing the time for installing and disassembling the model, enhancing the experimental flexibility and work efficiency, and at the same time ensuring that the building model is stably fixed on the vibration table, reducing the movement or tilt of the model during the test, and ensuring the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an earthquake simulation vibration table proposed by the utility model that takes into account the influence of soil structure;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of a base of an earthquake simulation vibration table proposed by the utility model taking into account the influence of soil structure;

[0025] Figure 3 This is a schematic diagram of the disassembly and cross-sectional structure of a buffer component of an earthquake simulation vibration table that takes into account the influence of soil structure proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of the enlarged structure of part A of an earthquake simulation vibration table that takes into account the influence of soil structure proposed by the utility model.

[0027] In the figure: 1. support platform; 2. support seat; 3. platform seat; 301, slide groove; 4. connecting column; 5. linkage plate; 6. linkage rod; 7. slide frame; 8. connecting frame; 9. electric push rod; 10. clamping block; 11. anti-slip sleeve; 12. top seat; 13. base; 14. damper; 15. buffer spring; 16. rubber pad; 17. support frame; 18. universal seat one; 19. excitation actuator No. 1; 20. universal seat two; 21. universal seat three; 22. excitation actuator No. 2; 23. universal seat four; 24. vibration machine. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Embodiment 1

[0030] Reference Figure 1-4 , a vibration table, comprising:

[0031] A support platform 1, four support seats 2 are installed at the four corners of the bottom of the support platform 1 by welding or other fixing methods, and a vibrator 24 (model: ZFB / LZF-3) is fixedly arranged at the top center of the support platform 1. The vibrator 24 is a key component for simulating earthquake vibrations, and can generate vibrations of different frequencies and amplitudes to simulate the impact of actual earthquakes.

[0032] Four rectangular slide grooves 301 are provided on the top of the pedestal 3, and a slide 7 is slidably installed in each slide groove 301. A connecting column 4 is fixed inside the pedestal 3, and a linkage plate 5 is rotatably installed on the outside of the connecting column 4. The top four corners of the linkage plate 5 are connected to one end of a linkage rod 6 through bearings or similar mechanisms, and the other end of the linkage rod 6 is rotatably connected to the bottom of the slide 7. In order to drive the linkage plate 5 to rotate, a connecting frame 8 is installed at the bottom of two symmetrical slides 7, and electric push rods 9 are installed on both sides of one of the connecting frames 8. The output ends of the two electric push rods 9 are fixedly arranged on both sides of the other connecting frame 8. When the electric push rod 9 is extended or retracted, the linkage plate 5 is pushed to rotate through the connecting frame 8, thereby driving the slide 7 to slide in the slide groove 301 through the linkage rod 6, so as to realize the clamping and release of the building model by the clamping block 10, so that building models of different sizes can be clamped and fixed quickly and conveniently, reducing the time for installing and disassembling the model, enhancing the flexibility of the experiment, and at the same time ensuring that the building model is stably fixed on the vibration table, reducing the movement or tilt of the model during the experiment, and ensuring the accuracy of the experiment.

[0033] A top seat 12 is fixed at the bottom of each support seat 2, and a base 13 is slidably installed at the bottom of each top seat 12. A damper 14 is installed inside the top seat 12 and the base 13. The bottom of the damper 14 is fixedly connected to the bottom wall of the base 13, and the piston end is fixedly connected to the top wall of the top seat 12. In addition, a buffer spring 15 is sleeved on the outside of the damper 14, and the bottom end of the buffer spring 15 is fixedly connected to the bottom wall of the base 13, and the top end is fixedly connected to the top wall of the top seat 12. The buffer assembly (including the damper 14 and the buffer spring 15) can effectively buffer and dissipate the vibration generated by the vibration table, reduce the amplitude and frequency of the vibration, reduce the vibration impact of the vibration table on the surrounding environment, and ensure the accuracy and safety of the experiment. At the same time, the buffer assembly can flexibly connect the vibration table and the ground and dissipate energy, which can reduce the impact force and stress concentration on the ground structure, thereby reducing the risk of damage.

[0034] Four universal seats 3 21 are installed on the top of the support platform 1, and a No. 2 excitation actuator 22 is hinged on the top of each universal seat 3 21. The output end of the No. 2 excitation actuator 22 (model: PARKER-EHA) is hinged with a universal seat 4 23, and the base 3 is fixed on the top of the four universal seats 4 23. In this way, by controlling the No. 2 excitation actuator 22, the inclination of the base 3 at multiple angles can be adjusted, thereby simulating the influence of different soil structures on the propagation of seismic waves.

[0035] Support frames 17 are installed on both sides of the top of the support platform 1, and a universal seat 18 is fixed on the inner side of the support frame 17. One end of the universal seat 18 is hinged to an excitation actuator No. 19, and the output end of the excitation actuator No. 19 (model: PARKER-EHA) is hinged to a universal seat 20, which is fixed on both sides of the base 3, further improving the stability of the base 3, ensuring that no excessive displacement or tilt will occur during the simulation of an earthquake, and at the same time, it can drive the base 3 to deviate at multiple angles, thereby simulating the influence of different soil structures on the propagation of seismic waves.

[0036] The present application can be used in the technical field of earthquake simulation vibration tables that take into account the influence of soil structures, and can also be used in other fields applicable to the present application.

[0037] Embodiment 2

[0038] On the basis of the first embodiment, the second embodiment also includes: an earthquake simulation vibration table considering the influence of soil structure, which is applied to the technical field of earthquake simulation vibration table considering the influence of soil structure. In order to reduce the friction and vibration between the base 13 and the ground, rubber pads 16 are fixed at the bottom of the four bases 13. The rubber pads 16 have good shock absorption and anti-slip properties, and can effectively improve the working safety of the vibration table.

[0039] In order to increase the stability of clamping, an anti-slip sleeve 11 is sleeved on the outside of the clamping block 10 to ensure that the anti-slip sleeve 11 on the clamping block 10 is in close contact with the building model to prevent the building model from sliding or falling off during the simulated earthquake.

[0040] However, as is well known to those skilled in the art, the working principles and wiring methods of the electric push rod 9, the first excitation actuator 19, the second excitation actuator 22 and the vibrator 24 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An earthquake simulation shaking table considering the influence of soil structure, characterized in that: include: A support platform (1) and a base (3), wherein the bottom of the support platform (1) is rectangular and has four support bases (2) fixedly disposed thereon, and a vibrator (24) is fixedly disposed at the center of the top of the support platform (1); A clamping assembly, the clamping assembly is arranged in a pedestal (3) and is used to clamp the building model, the clamping assembly comprises four rectangular slide grooves (301) opened on the top of the pedestal (3), slide racks (7) are slidably arranged inside the four slide grooves (301), a connecting column (4) is fixedly arranged inside the pedestal (3), a linkage plate (5) is rotatably arranged outside the connecting column (4), linkage rods (6) are rotatably arranged at the four corners of the top of the linkage plate (5), and the ends of the four linkage rods (6) that are far away from each other are respectively rotatably connected to the bottom of the four slide racks (7), wherein the bottoms of two symmetrical slide racks (7) are fixedly provided with connecting frames (8), both sides of one of the connecting frames (8) are fixedly provided with electric push rods (9), the output ends of the two electric push rods (9) are fixedly arranged on the two sides of the other connecting frame (8), and the tops of the four slide racks (7) are fixedly provided with clamping blocks (10); A buffer assembly is arranged on a support seat (2) and is used to buffer vibrations generated when the buffer device is working. The buffer assembly comprises four top seats (12) respectively fixedly arranged at the bottom of the four support seats (2), the bottom of the four top seats (12) are all slidably provided with a base (13), a damper (14) is fixedly arranged inside the top seat (12) and the base (13), the bottom of the damper (14) is fixedly connected to the bottom wall of the base (13), the piston end of the damper (14) is fixedly connected to the top wall of the top seat (12), the outside of the damper (14) is located between the base (13) and the top seat (12) and is provided with a buffer spring (15), the bottom end of the buffer spring (15) is fixedly connected to the bottom wall of the base (13), and the top end of the buffer spring (15) is fixedly connected to the top wall of the top seat (12).

2. The earthquake simulation vibration table considering the influence of soil structure according to claim 1, characterized in that: The top of the support platform (1) is rectangular and fixedly provided with four universal seats three (21), the tops of the four universal seats three (21) are hingedly provided with second excitation actuators (22), the output ends of the four second excitation actuators (22) are hingedly provided with universal seats four (23), and the platform (3) is fixedly provided on the tops of the four universal seats four (23).

3. The earthquake simulation vibration table considering the influence of soil structure according to claim 2, characterized in that: Support frames (17) are fixedly provided on both sides of the top of the support platform (1), and a universal seat 1 (18) is fixedly provided on the inner sides of the two support frames (17). One end of the two universal seats 1 (18) is hingedly provided with a first excitation actuator (19), and the output ends of the two first excitation actuators (19) are hingedly provided with a universal seat 2 (20), and the two universal seats 2 (20) are respectively fixedly provided on both sides of the platform (3).

4. The earthquake simulation vibration table considering the influence of soil structure according to claim 1, characterized in that: The exteriors of the four clamping blocks (10) are all covered with anti-slip covers (11).

5. The earthquake simulation vibration table considering the influence of soil structure according to claim 1, characterized in that: A rubber pad (16) is fixedly arranged at the bottom of each of the four bases (13).

Images