A device and method for detecting performance of a rubber seismic isolation support

Abstract

The present application relates to a kind of rubber shock insulation support performance detection device and method, the device includes support, for the rubber shock insulation support to be measured Vertical load is applied to the pressure applying device for being measured, for driving the rubber shock insulation support to be measured to do horizontal movement or / and vertical movement to simulate the earthquake environment simulation device of the rubber shock insulation support under earthquake environment and for the deformation variable of rubber shock insulation support is detected deformation variable detection device;The earthquake environment simulation device includes horizontal vibration generating device, vertical vibration generating device and vibration mode switching device;The deformation variable detection device is for the image acquisition and image processing of the deformed rubber shock insulation support, the deformation variable of the rubber shock insulation support is calculated to obtain the performance parameter of rubber shock insulation support.The rubber shock insulation support performance detection device of the present application can simulate under earthquake environment to detect the various performance parameters of rubber shock insulation support, and detection precision is higher.

Description

Technical Field

[0001] This invention belongs to the field of construction, specifically relating to a device and method for testing the performance of rubber seismic isolation bearings. Background Technology

[0002] Seismic isolation (vibration damping) technology is a seismic mitigation technology used in recent years for structures such as buildings, infrastructure, and bridges. It effectively isolates and dissipates energy transmitted from the foundation to the superstructure during earthquakes by installing seismic isolation devices at appropriate locations within the structure. This reduces the structure's response under dynamic loads, thereby ensuring structural functionality, improving structural safety, and enhancing operational economy. Earthquakes generate transverse waves, longitudinal waves, and surface waves, which can exert seismic forces on surface structures in multiple directions, causing damage or loss of functionality. Therefore, using seismic isolation rubber bearings can largely isolate the impact of ground motion on buildings and their internal facilities, enhancing the safety and reliability of the building structure. However, after production, seismic isolation rubber bearings require performance testing. This testing needs to simulate seismic environments to determine if the bearing's parameters meet standards, preventing accidents caused by substandard performance during actual use. Currently, there are no testing devices or methods that can simulate seismic environments to test the performance parameters of rubber seismic isolation bearings. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rubber seismic isolation bearing performance testing device. The rubber seismic isolation bearing performance testing device can simulate the testing of various performance parameters of the rubber seismic isolation bearing under seismic conditions, and the testing accuracy is higher.

[0004] The second objective of this invention is to provide a method for testing the performance of rubber seismic isolation bearings.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is:

[0006] A performance testing device for rubber seismic isolation bearings includes a support frame, an installation and fixing device mounted on the support frame for mounting the rubber seismic isolation bearing to be tested, a pressure application device for applying a vertical load to the rubber seismic isolation bearing to be tested, a seismic environment simulation device for driving the rubber seismic isolation bearing to be tested to perform horizontal and / or vertical movements to simulate the rubber seismic isolation bearing under seismic conditions, and a deformation detection device for detecting the deformation of the rubber seismic isolation bearing. The seismic environment simulation device includes a horizontal vibration generating device for inducing horizontal vibration of the rubber seismic isolation bearing, a vertical vibration generating device for inducing vertical vibration of the rubber seismic isolation bearing, and a vibration mode switching device for enabling the horizontal vibration generating device and the vertical vibration generating device to operate individually or in combination. The pressure application device is mounted on the support frame and applies pressure to the upper surface of the rubber seismic isolation bearing to simulate the vertical load of the building. The deformation detection device is used to acquire and process images of the deformed rubber seismic isolation bearing, calculate the deformation of the rubber seismic isolation bearing, and thus obtain the performance parameters of the rubber seismic isolation bearing.

[0007] Preferably, the mounting and fixing device includes a mounting base, a mounting groove disposed on the mounting base, and mounting bolts disposed in the mounting grooves. The mounting grooves are in multiple sets, arranged at equal angles along the circumference of the mounting base. The mounting grooves extend along the radius of the mounting base. The lower end face of the rubber vibration isolation bearing is provided with multiple sets of mounting holes that mate with the mounting bolts. The lower end face of the rubber vibration isolation bearing is mounted on the mounting base using the mounting bolts in the mounting grooves and the nuts on the mounting bolts.

[0008] Preferably, the horizontal vibration generating device includes a clamp disposed on the outside of the mounting base and a horizontal vibration generating drive mechanism for driving the clamp to perform linear reciprocating motion to drive the mounting base to perform horizontal reciprocating motion; the vertical vibration generating device includes a base and a vertical vibration generating drive mechanism for driving the base to perform vertical reciprocating motion, wherein the base is mounted on the bracket via a vertical guide mechanism; the lower end face of the mounting base is mounted on the upper end of the base via a transverse guide mechanism, the transverse guide mechanism being used to guide the horizontal reciprocating motion of the mounting base.

[0009] Preferably, the horizontal vibration generating mechanism includes a horizontal drive plate and a linear drive mechanism for driving the horizontal drive plate to perform linear reciprocating motion; one end of the horizontal drive plate is connected to the clamp, and the other end is provided with a horizontal drive groove; the vertical vibration generating drive mechanism includes two sets of swing members disposed on the bracket and a swing drive mechanism for driving the two sets of swing members to swing synchronously vertically, wherein the two sets of swing members are respectively located at the lower end of the base and on the front and rear sides of the base; each set of swing members includes two sets of swing blocks and a connecting shaft for connecting the two sets of swing blocks; the two sets of swing blocks are disposed on the left and right sides of the base; the swing blocks are rotatably connected to the bracket via a rotating shaft. The upper end of the swing block is connected via the connecting shaft; bearings are rotatably connected to both sides of the upper end of each set of swing blocks, and the outer circular surface of the bearings is used to support the lower end of the base; the connecting shafts of the front and rear sets of swing components are connected by a connecting rod; the swing drive mechanism is used to drive one set of connecting shafts to rotate, and the swing drive mechanism includes a vertical drive plate, one end of which is provided with a vertical slide groove, and one set of connecting shafts is installed in the vertical slide groove; the other end of the vertical drive plate is provided with a vertical drive slot; the linear drive mechanism can drive the vertical drive plate to perform linear reciprocating motion through the vibration attitude switching device to cause the connecting shaft connected to it to swing vertically.

[0010] Preferably, the linear drive mechanism includes a vibration generating motor mounted on the base, and a rotating shaft is provided on the main shaft of the vibration generating motor, the rotating shaft passing through the horizontal drive groove and the vertical drive groove; the vibration attitude switching device includes a rotating sleeve provided on the rotating shaft and a sliding drive mechanism for driving the rotating sleeve to slide along its axial direction on the rotating shaft, wherein the rotating sleeve is provided with a first eccentric drive part and a second eccentric drive part; when the sliding drive mechanism drives the rotating sleeve to move to the point where the second eccentric drive part is located in the horizontal drive groove or the vertical drive groove, the vibration generating motor is used to drive the horizontal drive plate or the vertical drive plate to perform linear motion; when the sliding drive mechanism drives the rotating sleeve to move to the point where the first eccentric drive part is located in the horizontal drive groove and the vertical drive groove, the vibration generating motor is used to drive the horizontal drive plate and the vertical drive plate to perform linear motion synchronously.

[0011] Preferably, the pressure application device includes a pressure plate and a vertical cylinder for driving the pressure plate to move vertically, wherein the vertical cylinder is mounted on the bracket; and a plurality of spherical pressing blocks are provided on the lower surface of the pressure plate.

[0012] Preferably, the system further includes an inertial force simulation device, which comprises a mounting plate, a viscous damper mounted on the mounting plate, and a speed control mechanism for controlling the relative speed between the piston rod and the cylinder of the viscous damper. The cylinder of the viscous damper is mounted on the mounting plate via a linear sliding mechanism. The piston rod of the viscous damper is connected to the upper connecting plate of the rubber vibration isolation bearing via a connecting mechanism. This connecting mechanism includes a first clamping block, a second clamping block, and a clamping adjustment mechanism for adjusting the clamping range of the first and second clamping blocks. The assembly includes a first clamping block and a second clamping block, both ends of which are mounted on the mounting plate via a clamping guide mechanism. The clamping guide mechanism includes a guide rod and a guide seat disposed on the mounting plate. One end of the guide rod is fixed to the second clamping block, and the other end passes through the first clamping block and the guide seat respectively. There are two sets of guide seats. Limiting blocks are provided at the locations of the two sets of guide blocks on the guide rod. A threaded section is provided at the location of the guide rod in contact with the first clamping block, and the clamping adjustment component is an adjusting nut disposed on the threaded section.

[0013] Preferably, the inertial force simulation device further includes a height adjustment mechanism for adjusting the height position of the mounting plate, wherein the mounting plate is mounted on the bracket via a vertical sliding mechanism; the height adjustment mechanism includes an adjustment motor and a lead screw transmission mechanism mounted on the bracket, wherein the adjustment motor is connected to the mounting plate via the lead screw transmission mechanism.

[0014] Preferably, the deformation detection device includes a camera mounted on the bracket and located in the circumferential direction of the rubber vibration isolation bearing, wherein there are multiple sets of cameras, and the multiple sets of cameras are facing the rubber layer of the rubber vibration isolation bearing.

[0015] A method for testing the performance of rubber seismic isolation bearings includes the following steps:

[0016] S1. The rubber vibration isolation bearing to be tested is installed on the bracket using the installation and fixing device;

[0017] S2. Activate the earthquake simulation device to simulate an earthquake environment, specifically including horizontal vibration mode, vertical vibration mode, and combined vibration mode.

[0018] The horizontal vibration mode is to simulate the horizontal vibration of an earthquake by driving the rubber seismic isolation bearing to make horizontal reciprocating motion through a horizontal vibration generator.

[0019] The vertical vibration mode is to drive the rubber seismic isolation bearing to make vertical reciprocating motion through a vertical vibration generator to simulate the vertical vibration of an earthquake.

[0020] The composite vibration mode is that the horizontal vibration generator and the vertical vibration generator drive the seismic isolation support to perform horizontal vibration and vertical vibration at the same time.

[0021] S3. Images of the rubber seismic isolation bearings under horizontal vibration mode, vertical vibration mode, and combined vibration mode are acquired using a deformation detection device. The acquired images are then processed and analyzed to obtain the performance parameters of the rubber seismic isolation bearings under different vibration modes.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The rubber seismic isolation bearing performance testing device of the present invention can simulate an earthquake environment, that is, simulate the horizontal vibration of an earthquake by using a horizontal vibration generator and simulate the vertical vibration of an earthquake by using a vertical vibration generator; and apply pressure to the upper surface of the rubber seismic isolation bearing by using a pressure application device to simulate the vertical load of the building structure on the rubber seismic isolation bearing, and detect the deformation of the rubber layer of the rubber seismic isolation bearing under different vibration modes by using a deformation detection device, thereby obtaining the performance parameters of the rubber seismic isolation bearing under earthquake action.

[0024] 2. The rubber seismic isolation bearing performance testing device of the present invention tests the performance of the rubber seismic isolation bearing by simulating an earthquake environment, thereby truly restoring the seismic performance of the rubber seismic isolation bearing in an earthquake environment; it helps manufacturers to identify the shortcomings of the rubber seismic isolation bearing in time and make targeted improvements to avoid incalculable losses caused by the rubber seismic isolation bearing in actual use. Attached Figure Description

[0025] Figures 1-4 These are schematic diagrams of the rubber seismic isolation bearing performance testing device from four different perspectives.

[0026] Figure 5 and Figure 6 These are schematic diagrams of the inertial force simulation device from two different perspectives.

[0027] Figure 7 and Figure 8 These are schematic diagrams of the earthquake environment simulation device from two different perspectives.

[0028] Figure 9 This is a schematic diagram of the vibration switching device.

[0029] Figure 10 This is a schematic diagram of the vibration switching device (with a hidden base).

[0030] Figure 11 This is a schematic diagram of the vertical vibration generating device. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0032] See Figures 1-11 The rubber seismic isolation bearing performance testing device of the present invention includes a support 1, an installation and fixing device 8 mounted on the support 1 for installing the rubber seismic isolation bearing 4 to be tested, a pressure application device 5 for applying a vertical load to the rubber seismic isolation bearing 4 to simulate the load of a building structure, a seismic environment simulation device 3 for driving the rubber seismic isolation bearing 4 to be tested to perform horizontal and / or vertical movements to simulate the rubber seismic isolation bearing 4 under seismic conditions, and a deformation detection device 7 for detecting the deformation of the rubber seismic isolation bearing 4. Through the above configuration, the rubber seismic isolation bearing performance testing device of the present invention can simulate a seismic environment, that is, simulate the horizontal vibration of an earthquake through a horizontal vibration generator and simulate the vertical vibration of an earthquake through a vertical vibration generator; and apply pressure to the upper surface of the rubber seismic isolation bearing 4 through the pressure application device 5 to simulate the vertical load of the building structure on the rubber seismic isolation bearing 4, and detect the deformation of the rubber layer of the rubber seismic isolation bearing 4 under different vibration modes through the deformation detection device 7, thereby obtaining the performance parameters of the rubber seismic isolation bearing 4 under seismic conditions.

[0033] See Figures 1-11 The mounting and fixing device 8 includes a mounting base 801, a mounting groove 803 disposed on the mounting base 801, and mounting bolts 802 disposed within the mounting grooves 803. The mounting grooves 803 are in multiple sets, arranged at equal angles along the circumference of the mounting base 801. The mounting grooves 803 extend along the radial direction of the mounting base 801. The lower end face of the rubber vibration isolation bearing 4 is provided with multiple sets of mounting holes that mate with the mounting bolts 802. The lower end face of the rubber vibration isolation bearing 4 is mounted on the mounting base 801 using the mounting bolts 802 on the mounting grooves 803 and the nuts on the mounting bolts 802. Since the mounting grooves 803 extend along the radial direction of the mounting base 801, the position of the mounting bolts 802 within the mounting grooves 803 can be adjusted to accommodate rubber vibration isolation bearings 4 of different diameters.

[0034] See Figures 1-11 The earthquake environment simulation device 3 includes a horizontal vibration generating device for causing horizontal vibration of the rubber seismic isolation bearing 4, a vertical vibration generating device for causing vertical vibration of the rubber seismic isolation bearing 4, and a vibration mode switching device for causing the horizontal vibration generating device and the vertical vibration generating device to work individually or in combination; wherein,

[0035] The horizontal vibration generating device includes a clamp 305 disposed on the outside of the mounting base 801 and a horizontal vibration generating drive mechanism for driving the clamp 305 to perform linear reciprocating motion to drive the mounting base 801 to perform horizontal reciprocating motion; the horizontal vibration generating mechanism includes a horizontal drive plate 306 and a linear drive mechanism for driving the horizontal drive plate 306 to perform linear reciprocating motion; one end of the horizontal drive plate 306 is connected to the clamp 305, and the other end is provided with a horizontal drive groove;

[0036] The vertical vibration generating device includes a base 307 and a vertical vibration generating drive mechanism for driving the base 307 to reciprocate vertically. The base 307 is mounted on the bracket 1 via a vertical guide mechanism (e.g., including a guide rod and a guide sleeve). The lower end face of the mounting seat 801 is mounted on the upper end of the base 307 via a horizontal guide mechanism (e.g., including a slider and a groove), which guides the horizontal reciprocating motion of the mounting seat 801. The vertical vibration generating drive mechanism includes two sets of swing members disposed on the bracket 1 and a swing drive mechanism for driving the two sets of swing members to swing synchronously vertically. The two sets of swing members are located at the lower end of the base 307 and on its front and rear sides. Each set of swing members includes two sets of swing blocks 309 and a connecting shaft 311 for connecting the two sets of swing blocks 309. The two sets of swing blocks 309 are disposed on the base 307. The left and right sides of the base 7; the swing block 309 is rotatably connected to the bracket 1 via the rotating shaft 310, and the upper end of the swing block 309 is connected via the connecting shaft 311; bearings 313 are rotatably connected to both sides of the upper end of each set of swing blocks 309, and the outer circular surface of the bearing 313 is used to support the lower end of the base 307; the connecting shafts 311 of the front and rear sets of swing components are connected by a connecting rod 312; the swing drive mechanism is used to drive one set of connecting shafts 311 to rotate, and the swing drive mechanism includes a vertical drive plate 308, one end of the vertical drive plate 308 is provided with a vertical slide groove, and one set of connecting shafts 311 is installed in the vertical slide groove; the other end of the vertical drive plate 308 is provided with a vertical drive groove; the linear drive mechanism can drive the vertical drive plate 308 to perform linear reciprocating motion through the vibration attitude switching device to cause the connecting shaft 311 connected to it to swing vertically.

[0037] In this embodiment, the linear drive mechanism includes a vibration generating motor 301 mounted on the base 307. A rotating shaft is mounted on the main shaft of the vibration generating motor 301, passing through the horizontal drive groove and the vertical drive groove. The vibration attitude switching device includes a rotating sleeve 302 mounted on the rotating shaft and a sliding drive mechanism for driving the rotating sleeve 302 to slide along its axial direction on the rotating shaft. The rotating sleeve 302 is provided with a first eccentric drive portion 3021 and a second eccentric drive portion 3022. When the... When the sliding drive mechanism drives the rotating sleeve 302 to move to the position where the second eccentric drive part 3022 is located in the horizontal drive groove or the vertical drive groove, the vibration generating motor 301 drives the horizontal drive plate 306 or the vertical drive plate 308 to perform linear motion; when the sliding drive mechanism drives the rotating sleeve 302 to move to the position where the first eccentric drive part 3021 is located in the horizontal drive groove and the vertical drive groove, the vibration generating motor 301 drives the horizontal drive plate 306 and the vertical drive plate 308 to perform linear motion synchronously.

[0038] The above settings have the following effects:

[0039] (1) When it is necessary to generate horizontal vibration of the rubber seismic isolation bearing 4, the sliding drive mechanism is used to drive the rotating sleeve 302 to move to the second eccentric drive part 3022 when it is located in the horizontal drive groove. The vibration generating motor 301 is used to drive the rotating sleeve 302 to rotate, thereby driving the second eccentric drive part 3022 to rotate, thereby driving the horizontal drive plate 306 to perform linear reciprocating motion. During the linear reciprocating motion of the horizontal drive plate 306, the horizontal drive plate 306 drives the clamp 305 to move, thereby driving the mounting base 801 to perform linear reciprocating motion under the guidance of the transverse guide mechanism, thereby driving the rubber seismic isolation bearing 4 located on the mounting base 801 to perform horizontal motion, thereby simulating horizontal vibration in the earthquake environment.

[0040] (2) When vertical vibration is required to be generated on the rubber seismic isolation bearing 4, the sliding drive mechanism is used to drive the rotating sleeve 302 to move to the position of the second eccentric drive part 3022 in the vertical drive groove. The vibration generating motor 301 is used to drive the rotating sleeve 302 to rotate, thereby driving the second eccentric drive part 3022 to rotate, thereby driving the vertical drive plate 308 to perform linear reciprocating motion. During the linear reciprocating motion of the vertical drive plate 308, the vertical drive plate 308 drives the connecting shaft 311 to perform linear motion. During this process, in order to adapt to the vertical swing of the swing block 309, the connecting shaft 311 will perform vertical motion in the vertical groove of the vertical drive plate 308, thereby driving the base 307 to perform vertical reciprocating motion under the guidance of the vertical guide mechanism, thereby driving the mounting seat 801 on the base 307 and the rubber seismic isolation bearing 4 on the mounting seat 801 to perform vertical motion, thereby simulating vertical vibration in the earthquake environment.

[0041] (3) When it is necessary to generate horizontal and vertical vibrations for the rubber seismic isolation bearing 4, the sliding drive mechanism is used to drive the rotating sleeve 302 to move to the first eccentric drive part 3021, which is located in both the horizontal drive groove and the vertical drive groove. The vibration generating motor 301 is used to drive the rotating sleeve 302 to rotate, thereby driving the first eccentric drive part 3021 to rotate, which in turn drives the horizontal drive plate 306 and the vertical drive plate 308 to perform linear reciprocating motion. According to the descriptions in (1) and (2) above, the rubber seismic isolation bearing 4 can be driven to perform horizontal and vertical motions simultaneously, thereby simulating horizontal and vertical vibrations in an earthquake environment.

[0042] In addition, the sliding drive mechanism includes a linear motor 304 mounted on the base 307. The drive shaft of the linear motor 304 is connected to the rotating sleeve 302 through a connector 303, thereby driving the rotating sleeve 302 to perform linear motion and realize the switching of vibration modes.

[0043] See Figures 1-11The pressure application device 5 is mounted on the bracket 1 and is used to apply pressure to the upper surface of the rubber seismic isolation bearing 4 to simulate the vertical load of the building structure. The pressure application device 5 includes a pressure plate 502 and a vertical cylinder 501 for driving the pressure plate 502 to move vertically. The vertical cylinder 501 is mounted on the bracket 1. The lower surface of the pressure plate 502 is provided with a plurality of spherical pressing blocks 503. The vertical cylinder 501 drives the pressure plate 502 to move downward, so that the spherical pressing blocks 503 on the pressure plate 502 press against the upper surface of the rubber seismic isolation bearing 4, thereby applying a vertical load to the rubber seismic isolation bearing 4 to simulate the pressure of the building structure on the upper surface of the rubber seismic isolation bearing 4. The downward pressure on the surface; since the pressing block is a spherical pressing block 503, and the contact area between the spherical pressing block 503 and the upper end surface of the rubber vibration isolation support 4 is small, the contact area between the pressure plate 502 and the upper end surface of the rubber vibration isolation support 4 is also reduced; therefore, the friction between the upper end surface of the rubber vibration isolation support 4 and the pressure plate 502 is also reduced. Therefore, when the rubber vibration isolation support 4 vibrates horizontally, the inertial force it experiences is less affected by the pressure application device 5, and the inertial force applied to the rubber vibration isolation support 4 mainly comes from the inertial force simulation device 2. Thus, the magnitude and direction of the inertial force can be controlled through the inertial force simulation device 2, thereby more closely resembling the real scene.

[0044] See Figures 1-11 The deformation detection device 7 is used to acquire and process images of the deformed rubber seismic isolation bearing 4, calculate the deformation of the rubber seismic isolation bearing 4, and thus obtain the performance parameters of the rubber seismic isolation bearing 4. The deformation detection device 7 includes multiple cameras mounted on the support 1 and located in the circumferential direction of the rubber seismic isolation bearing 4, with each set of cameras facing the rubber layer of the rubber seismic isolation bearing 4. The cameras acquire images of the deformation (e.g., deformation amount) of the rubber layer of the rubber seismic isolation bearing 4 under different vibration modes, and then send these images to a processor for processing and analysis to finally obtain the performance parameters of the rubber seismic isolation bearing 4. In this embodiment, the performance parameters of the rubber seismic isolation bearing 4 can be obtained by processing and analyzing the captured images using existing technology.

[0045] See Figures 1-11The rubber seismic isolation bearing performance testing device of the present invention further includes an inertial force simulation device 2. The inertial force simulation device 2 includes a mounting plate 201, a viscous damper 209 disposed on the mounting plate 201, and a speed control mechanism for controlling the relative speed between the piston rod and the cylinder in the viscous damper 209. The cylinder of the viscous damper 209 is mounted on the mounting plate 201 via a linear sliding mechanism. The piston rod of the viscous damper 209 is connected to the upper connecting plate of the rubber seismic isolation bearing 4 via a connecting mechanism. The connecting mechanism includes a first clamping block 203, a second clamping block 204, and a clamping adjustment assembly for adjusting the clamping range of the first clamping block 203 and the second clamping block 204. Both ends of the first clamping block 203 and the second clamping block 204 are mounted on the mounting plate via clamping guide mechanisms. Mounting plate 201; the clamping and guiding mechanism includes a guide rod 207 and a guide seat 205 disposed on the mounting plate 201, wherein one end of the guide rod 207 is fixed to the second clamping block 204, and the other end passes through the first clamping block 203 and the guide seat 205 respectively, wherein there are two sets of guide seats 205; a limit block 206 is provided at the part of the guide rod 207 located between the two sets of guide blocks to prevent the guide rod 207 from sliding out of the guide seat 205; the guide rod 207 is provided with a threaded section at the part that contacts the first clamping block 203, and the clamping adjustment component is an adjusting nut 208 disposed on the threaded section; by adjusting the position of the adjusting nut 208, the position between the first clamping block 203 and the second clamping block 204 is adjusted to accommodate rubber vibration isolation bearings 4 of different diameters.

[0046] Because the rubber seismic isolation bearing 4 is subjected to vertical loads from the building structure during seismic events, and also to inertial forces during horizontal vibrations, the magnitude of which is related to its mass and acceleration, specifically: F 惯 =ma, where F 惯 Let F be the inertial force, m be the mass of the object, and a be the acceleration of the object. Ignoring the influence of inertial force during performance testing of rubber seismic isolation bearings can negatively impact the test results. Therefore, to more realistically simulate the deformation of the rubber seismic isolation bearing 4 under seismic conditions, this invention incorporates a viscous damper 209. The damping force of the viscous damper 209 simulates the inertial force of the rubber seismic isolation bearing 4. The damping force provided by the viscous damper 209 is related to the damping coefficient and velocity, specifically: F... 阻 =CVα, where F 阻 Let F be the damping force, C be the damping coefficient, V be the velocity of the piston, and α be the velocity exponent. Given a chosen damping coefficient C and velocity exponent α, the damping force F... 阻The relative velocity between the piston and the cylinder is proportional to the piston's velocity V. By connecting the piston rod of the viscous damper 209 to the upper connecting plate of the rubber vibration isolation support 4, during vibration simulation, when the rubber vibration isolation support 4 vibrates horizontally, it drives the piston rod of the viscous damper 209 to move, thereby generating a damping force. Since the magnitude of the damping force is related to the velocity of the rubber vibration isolation support 4, and the magnitude of the inertial force is related to the acceleration of the rubber vibration isolation support 4, in order to make the damping force equal to the inertial force, the relative velocity between the piston and the cylinder in the viscous damper 209 needs to be adjusted in real time. Specifically, the speed control mechanism drives the cylinder of the viscous damper 209 to move during operation, thereby controlling the relative velocity between the piston and the cylinder in the viscous damper 209, so that the damping force equals the inertial force. During the test, the relative positions of the first clamping block 203 and the second clamping block 204 are adjusted by adjusting the nut 208, thereby clamping the upper surface of the rubber seismic isolation bearing 4. Then, during the test, the viscous damper 209 is driven to move linearly by the speed control mechanism, thereby generating a damping force on the rubber seismic isolation bearing 4 clamped by the first clamping block 203 and the second clamping block 204, thus simulating the magnitude of the inertial force experienced by the rubber seismic isolation bearing 4 during vibration. Through the above settings, the deformation of the rubber seismic isolation bearing 4 under seismic conditions can be realistically reproduced, thus improving the detection accuracy.

[0047] See Figures 1-11 The speed control mechanism includes a drive motor 202, on which an eccentric wheel 210 is mounted. The eccentric wheel 210 is connected to the cylinder of the viscous damper 209 via a connecting rod 211, with both ends of the connecting rod 211 hinged to the eccentric wheel 210 and the cylinder of the viscous damper 209, respectively. The cylinder of the viscous damper 209 is connected to the mounting plate 201 via a linear sliding mechanism (e.g., including a slider and a slide rail) to guide the linear motion of the cylinder of the viscous damper 209. The drive motor 202 drives the eccentric wheel 210 to rotate, thereby causing the cylinder of the viscous damper 209 to reciprocate linearly under the guidance of the linear sliding mechanism (equivalent to a crank-slider mechanism), thus imparting a speed to the cylinder of the viscous damper 209, thereby adjusting the magnitude of the damping force to be equal to the inertial force.

[0048] See Figures 1-11The inertial force simulation device 2 further includes a height adjustment mechanism 6 for adjusting the height position of the mounting plate 201. The mounting plate 201 is mounted on the bracket 1 via a vertical sliding mechanism (e.g., including a slider and a groove). The height adjustment mechanism 6 includes an adjustment motor 601 mounted on the bracket 1 and a lead screw transmission mechanism 602. The adjustment motor 601 is connected to the mounting plate 201 via the lead screw transmission mechanism 602. By adjusting the motor 601, the lead screw is rotated, thereby causing the lead screw nut and the mounting plate 201 mounted on the lead screw nut to move vertically, so that the inertial force simulation device 2 can adapt to rubber vibration isolation supports 4 of different heights.

[0049] See Figures 1-11 The performance testing method for the rubber seismic isolation bearing 4 of the present invention includes the following steps:

[0050] S1. The rubber vibration isolation bearing 4 to be tested is installed on the bracket 1 using the mounting and fixing device 8;

[0051] S2. Activate the earthquake simulation device to simulate an earthquake environment, specifically including horizontal vibration mode, vertical vibration mode, and combined vibration mode. The horizontal vibration mode simulates the horizontal vibration of an earthquake by having the rubber seismic isolation bearing 4 reciprocate horizontally using a horizontal vibration generator. The vertical vibration mode simulates the vertical vibration of an earthquake by having the rubber seismic isolation bearing 4 reciprocate vertically using a vertical vibration generator. The combined vibration mode simulates both horizontal and vertical vibration of the seismic isolation bearing by both the horizontal and vertical vibration generators.

[0052] S3. The deformation detection device 7 acquires images of the rubber seismic isolation bearing 4 under horizontal vibration mode, vertical vibration mode and combined vibration mode. Then, the acquired images are processed and analyzed to obtain the performance parameters of the rubber seismic isolation bearing 4 under different vibration modes.

[0053] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A performance testing device for a rubber seismic isolation bearing, comprising a support, an installation and fixing device mounted on the support for installing the rubber seismic isolation bearing to be tested, a pressure application device for applying a vertical load to the rubber seismic isolation bearing to be tested, a seismic environment simulation device for driving the rubber seismic isolation bearing to be tested to perform horizontal and / or vertical movement to simulate the rubber seismic isolation bearing being in a seismic environment, and a deformation detection device for detecting the deformation of the rubber seismic isolation bearing, wherein, The earthquake environment simulation device includes a horizontal vibration generating device for inducing horizontal vibration of the rubber seismic isolation bearing, a vertical vibration generating device for inducing vertical vibration of the rubber seismic isolation bearing, and a vibration mode switching device for enabling the horizontal vibration generating device and the vertical vibration generating device to work individually or in combination; the pressure applying device is installed on the support and is used to apply pressure to the upper surface of the rubber seismic isolation bearing to simulate the vertical load of the building; the deformation detection device is used to acquire and process images of the deformed rubber seismic isolation bearing, calculate the deformation of the rubber seismic isolation bearing, and thus obtain the performance parameters of the rubber seismic isolation bearing; It also includes an inertial force simulation device, which comprises a mounting plate, a viscous damper mounted on the mounting plate, and a speed control mechanism for controlling the relative speed between the piston rod and the cylinder of the viscous damper. The cylinder of the viscous damper is mounted on the mounting plate via a linear sliding mechanism. The piston rod of the viscous damper is connected to the upper connecting plate of the rubber vibration isolation bearing via a connecting mechanism, wherein the connecting mechanism includes a first clamping block, a second clamping block, and a clamping adjustment assembly for adjusting the clamping range of the first clamping block and the second clamping block. Both ends of the first clamping block and the second clamping block are mounted on the mounting plate via a clamping guide mechanism. The clamping guide mechanism includes a guide rod and a guide seat disposed on the mounting plate. One end of the guide rod is fixed to the second clamping block, and the other end passes through the first clamping block and the guide seat respectively. There are two sets of guide seats. Limiting blocks are provided at the locations of the two sets of guide blocks on the guide rod. A threaded section is provided at the location of the guide rod in contact with the first clamping block, and the clamping adjustment component is an adjusting nut disposed on the threaded section.

2. The rubber seismic isolation bearing performance testing device according to claim 1, characterized in that, The mounting and fixing device includes a mounting base, mounting grooves on the mounting base, and mounting bolts within the mounting grooves. The mounting grooves are in multiple sets, arranged at equal angles along the circumference of the mounting base. The mounting grooves extend radially along the mounting base. The lower end face of the rubber vibration isolation bearing has multiple sets of mounting holes that mate with the mounting bolts. The lower end face of the rubber vibration isolation bearing is mounted on the mounting base using the mounting bolts in the mounting grooves and the nuts on the mounting bolts.

3. The rubber seismic isolation bearing performance testing device according to claim 2, characterized in that, The horizontal vibration generating device includes a clamp disposed on the outside of the mounting base and a horizontal vibration generating drive mechanism for driving the clamp to perform linear reciprocating motion to drive the mounting base to perform horizontal reciprocating motion; the vertical vibration generating device includes a base and a vertical vibration generating drive mechanism for driving the base to perform vertical reciprocating motion, wherein the base is mounted on the bracket through a vertical guide mechanism; the lower end face of the mounting base is mounted on the upper end of the base through a transverse guide mechanism, the transverse guide mechanism being used to guide the horizontal reciprocating motion of the mounting base.

4. The rubber seismic isolation bearing performance testing device according to claim 3, characterized in that, The horizontal vibration generating mechanism includes a horizontal drive plate and a linear drive mechanism for driving the horizontal drive plate to perform linear reciprocating motion; one end of the horizontal drive plate is connected to the clamp, and the other end is provided with a horizontal drive groove; the vertical vibration generating drive mechanism includes two sets of swing members mounted on the bracket and a swing drive mechanism for driving the two sets of swing members to swing synchronously vertically, wherein the two sets of swing members are respectively located at the lower end of the base and on the front and rear sides of the base; each set of swing members includes two sets of swing blocks and a connecting shaft for connecting the two sets of swing blocks; the two sets of swing blocks are located on the left and right sides of the base; the swing blocks are rotatably connected to the bracket via a rotating shaft. The upper end of the swing block is connected via the connecting shaft; bearings are rotatably connected to both sides of the upper end of each set of swing blocks, and the outer circular surface of the bearings is used to support the lower end of the base; the connecting shafts of the front and rear sets of swing components are connected by a connecting rod; the swing drive mechanism is used to drive one set of connecting shafts to rotate, and the swing drive mechanism includes a vertical drive plate, one end of which is provided with a vertical slide groove, and one set of connecting shafts is installed in the vertical slide groove; the other end of the vertical drive plate is provided with a vertical drive slot; the linear drive mechanism can drive the vertical drive plate to perform linear reciprocating motion through the vibration attitude switching device to cause the connecting shaft connected to it to swing vertically.

5. The rubber seismic isolation bearing performance testing device according to claim 4, characterized in that, The linear drive mechanism includes a vibration generating motor mounted on the base, and a rotating shaft is provided on the main shaft of the vibration generating motor, which passes through the horizontal drive groove and the vertical drive groove. The vibration attitude switching device includes a rotating sleeve disposed on the rotating shaft and a sliding drive mechanism for driving the rotating sleeve to slide along the axial direction of the rotating shaft. The rotating sleeve is provided with a first eccentric drive part and a second eccentric drive part. When the sliding drive mechanism drives the rotating sleeve to move to the point where the second eccentric drive part is located in the horizontal drive groove or the vertical drive groove, the vibration generating motor is used to drive the horizontal drive plate or the vertical drive plate to perform linear motion. When the sliding drive mechanism drives the rotating sleeve to move to the point where the first eccentric drive part is located in the horizontal drive groove and the vertical drive groove, the vibration generating motor is used to drive the horizontal drive plate and the vertical drive plate to move in a straight line synchronously.

6. The rubber seismic isolation bearing performance testing device according to claim 1, characterized in that, The pressure application device includes a pressure plate and a vertical cylinder for driving the pressure plate to move vertically, wherein the vertical cylinder is mounted on the bracket; and a plurality of spherical pressing blocks are provided on the lower surface of the pressure plate.

7. The rubber seismic isolation bearing performance testing device according to claim 1, characterized in that, The inertial force simulation device further includes a height adjustment mechanism for adjusting the height position of the mounting plate, wherein the mounting plate is mounted on the bracket via a vertical sliding mechanism; the height adjustment mechanism includes an adjustment motor and a lead screw transmission mechanism mounted on the bracket, wherein the adjustment motor is connected to the mounting plate via the lead screw transmission mechanism.

8. The rubber seismic isolation bearing performance testing device according to claim 1, characterized in that, The deformation detection device includes a camera mounted on the bracket and located in the circumferential direction of the rubber vibration isolation bearing, wherein there are multiple sets of cameras, and the multiple sets of cameras are facing the rubber layer of the rubber vibration isolation bearing.

9. A method for testing the performance of rubber seismic isolation bearings using the rubber seismic isolation bearing performance testing device according to any one of claims 1-8, characterized in that, Includes the following steps: S1. The rubber vibration isolation bearing to be tested is installed on the bracket using the installation and fixing device; S2. Activate the earthquake simulation device to simulate an earthquake environment, specifically including horizontal vibration mode, vertical vibration mode, and combined vibration mode. The horizontal vibration mode is to simulate the horizontal vibration of an earthquake by driving the rubber seismic isolation bearing to make horizontal reciprocating motion through a horizontal vibration generator. The vertical vibration mode is to drive the rubber seismic isolation bearing to make vertical reciprocating motion through a vertical vibration generator to simulate the vertical vibration of an earthquake. The composite vibration mode is that the horizontal vibration generator and the vertical vibration generator drive the seismic isolation support to perform horizontal vibration and vertical vibration at the same time. S3. Images of the rubber seismic isolation bearings under horizontal vibration mode, vertical vibration mode, and combined vibration mode are acquired using a deformation detection device. The acquired images are then processed and analyzed to obtain the performance parameters of the rubber seismic isolation bearings under different vibration modes.

Images