A seismic bracing seismic performance testing device

Abstract

This invention discloses a seismic bracing performance testing device, comprising: a support base on which a vibration simulator for providing a vibration source is mounted; a support platform disposed at the top of the vibration simulator; and a testing platform connected to the top surface of the support platform via a lifting mechanism for mounting the seismic bracing. The support platform, lifting mechanism, and testing platform can transmit vibrations to the seismic bracing, simulating the seismic resistance conditions at the installation location of the seismic bracing in actual use. Furthermore, the lifting mechanism allows adjustment of the height of the testing platform relative to the support platform to meet the testing requirements for the seismic performance of seismic bracing at different installation heights, thus improving the accuracy of seismic performance testing.

Description

Technical Field

[0001] This invention relates to the field of seismic bracing performance testing technology, and more specifically, to a seismic bracing performance testing device. Background Technology

[0002] Seismic bracing is a type of component or device that limits the displacement of auxiliary electromechanical engineering facilities, controls the vibration of these facilities, and transfers loads to the supporting structure. During an earthquake, seismic bracing provides reliable protection for building electromechanical engineering facilities, withstanding seismic forces from any direction. To ensure the stability of seismic bracing in use, its seismic performance must be tested after production. This allows for assessment of the seismic resistance capability of the bracing and facilitates further structural optimization.

[0003] In the prior art, Chinese invention patent application number 201910404289.6 discloses a seismic bracing seismic performance testing device and its usage method, including a top connecting plate, a middle connecting plate below the top connecting plate, a bottom connecting plate below the middle connecting plate, and a left vertical plate and a right vertical plate on both sides of the bottom connecting plate, with the right vertical plate positioned to the right of the left vertical plate. When the seismic bracing is first put into use, fiber optic strain sensors with known strain response sensitivity coefficients are placed on various structural components of the seismic bracing to achieve online real-time monitoring. However, the aforementioned prior art only provides online real-time monitoring of the seismic bracing and does not test the seismic performance of its structure before use.

[0004] Chinese invention patent application number 202210543620.4 discloses a seismic bracing performance testing device and its usage method, including a base. A processing box is located on the upper left side of the base, and an operating platform is located on the right side of the base. Two second hydraulic cylinders are symmetrically arranged at one end of a first fixed plate. Four first hydraulic rods are evenly arranged at the lower end of the operating platform. Two lead screws are symmetrically arranged at both ends of the operating platform, and a camera is positioned between the lead screws. A vibrator is located on the right side of a third hydraulic cylinder. The third hydraulic rod structure drives a transverse pushing frame to vibrate the transverse sides of the seismic bracing. The camera structure in the middle observes the swaying of the seismic bracing and supporting equipment. The transverse pushing frame is installed, fixed, and replaced using mounting threads, mounting holes, and mounting parts. In the aforementioned prior art, vibration treatment is applied to both lateral sides of the seismic brace. However, in actual use, the seismic brace is suspended from the top, and the pipes are installed on it. The seismic brace then bears vibrations from all directions. Therefore, the vibration simulation method in this invention patent differs significantly from actual use, leading to deviations in the seismic performance test results. Thus, it is necessary to propose a seismic brace seismic performance testing device to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a seismic bracing seismic performance testing device, comprising:

[0007] A support base on which a vibration simulator is provided to provide a vibration source;

[0008] A support platform is installed at the top of the vibration simulator;

[0009] The testing platform is connected to the top surface of the support platform via a lifting mechanism and is used to install seismic bracing.

[0010] Preferably, the lifting mechanism includes:

[0011] A fixed cylinder is installed on the top surface of the support platform;

[0012] The lifting rod has its top end connected to the testing platform and its bottom end provided with a first plug, which is slidably connected inside the fixed cylinder;

[0013] The drive locking part is used to drive the lifting rod to move up and down and fix the height of the lifting rod.

[0014] Preferably, the drive locking part includes:

[0015] The first driving cavity is formed in the fixed cylinder on the side of the first plug away from the lifting rod;

[0016] A driving body, connected to the first driving cavity, is used to change the volume of the first driving cavity;

[0017] A locking mechanism is located at the top of the fixed cylinder and is used to limit the lifting rod.

[0018] Preferably, the locking mechanism is symmetrically arranged on both sides of the lifting rod, and the locking mechanism includes:

[0019] The movable block is rotatably connected to the mounting groove provided at the top of the fixed cylinder; the bottom end of the movable block is provided with a slot on the side near the lifting rod.

[0020] The first spring is connected between the slot and the side wall of the mounting slot, and is used to generate a pushing force on the bottom end of the movable block;

[0021] The locking block is located at the top of the movable block near the lifting rod and is used to engage and fix it to the lifting rod.

[0022] Preferably, the locking block has a first locking structure on the side near the lifting rod, and the lifting rod has a second locking structure that cooperates with the first locking structure on its side.

[0023] Preferably, the bottom surface of the testing platform is provided with a threaded hole for installing an anti-vibration bracket.

[0024] Preferably, the testing platform is also provided with a locking mechanism, which is used to generate an auxiliary locking force for the connection between the anti-seismic bracket and the threaded hole.

[0025] Preferably, the locking mechanism includes:

[0026] The second driving cavity is located above the threaded hole, and the threaded hole and the second driving cavity are connected.

[0027] The second plug is slidably disposed in the second driving cavity; the bottom surface of the second plug is connected to a connecting plate via a first connecting rod.

[0028] The second spring is disposed between the stepped surface formed by the threaded hole and the second driving cavity and the connecting plate;

[0029] A locking cavity is provided on both sides of the threaded hole, and the two sides of the second driving cavity are connected to the locking cavity through a connecting cavity;

[0030] A locking block is slidably disposed in the locking cavity. The side of the locking block near the threaded hole is an arc-shaped surface, and the arc-shaped surface is provided with an internal thread corresponding to the threaded hole.

[0031] The third plug is slidably disposed in the end of the communicating cavity near the locking cavity, and the third plug is connected to the locking block through the second connecting rod.

[0032] Preferably, the seismic bracing is mounted on a testing platform, and pipes are installed on the seismic bracing; it also includes:

[0033] Strain sensors are installed on the components under test in the seismic bracing system to collect strain information on the components under test.

[0034] Vibration sensors are installed on pipes to collect vibration information of the pipes.

[0035] The detection and control terminal communicates with the strain sensor and vibration sensor to store and analyze strain information collected by the strain sensor before, during, and after the earthquake, as well as vibration information collected by the vibration sensor.

[0036] Preferably, the strain sensor is provided with a strain probe and a temperature probe. The strain probe is used to detect the strain of the strain sensor, and the temperature probe is used to detect the temperature of the strain sensor and to perform temperature compensation on the strain value detected by the strain probe.

[0037] Preferably, the strain value ε after temperature compensation is calculated using the following formula:

[0038]

[0039] Where Δd1k is the distance the strain probe moves when the strain sensor deforms, L is the strain measurement gauge length of the strain sensor, and P is the coefficient of variation of the strain of the strain sensor itself with temperature. G represents the strain value generated by the temperature probe when the temperature changes, where G is the strain value generated by the temperature probe when the temperature changes by 1 degree Celsius.

[0040] Compared with the prior art, the present invention has at least the following beneficial effects:

[0041] The seismic performance testing device for seismic bracing described in this invention can transmit vibrations to the seismic bracing through a support platform, a lifting mechanism, and a testing platform. This can simulate the seismic resistance of the installation position when the seismic bracing is actually in use. Furthermore, the lifting mechanism can adjust the height of the testing platform relative to the support platform to meet the testing requirements for the seismic performance of seismic bracing at different hoisting heights, thereby improving the accuracy of the seismic performance testing.

[0042] The seismic bracing seismic performance testing device of the present invention, other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of the present invention. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0044] Figure 1 This is a schematic diagram of the seismic performance testing device for the seismic bracing described in this invention;

[0045] Figure 2 This is a schematic diagram of the internal structure of the seismic performance testing device for the seismic bracing described in this invention;

[0046] Figure 3 This is a schematic diagram of the lifting mechanism in the seismic performance testing device for the seismic bracing described in this invention;

[0047] Figure 4 This is a schematic diagram of the locking mechanism in the seismic performance testing device for the seismic bracing described in this invention;

[0048] Figure 5 This is a schematic diagram of the locking mechanism in the seismic performance testing device for the seismic brace described in this invention;

[0049] Figure 6 The seismic performance testing device for the seismic bracing described in this invention is used in... Figure 5 A partially enlarged structural diagram;

[0050] Figure 7 This is a schematic diagram of the locking mechanism in the seismic bracing performance testing device of the present invention when locking the seismic bracing;

[0051] Figure 8 This is a schematic diagram of the structure of the seismic support in the seismic performance testing device of the seismic support described in this invention. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0053] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0054] like Figures 1-8 As shown, the present invention provides a seismic performance testing device for seismic bracing, comprising:

[0055] Support base 1, on which a vibration simulator 2 for providing a vibration source is provided;

[0056] Support platform 3 is set at the top of the vibration simulator 2;

[0057] The testing platform 4 is connected to the top surface of the support platform 3 via a lifting mechanism 5, and is used to install the seismic bracing 6.

[0058] The working principle and beneficial effects of the above technical solution are as follows: The vibration simulator 2 is a device that can simulate the occurrence of actual earthquakes, which is the existing technology; the support base 1 is used to support the entire detection device, and the support platform 3 is used to support the lifting mechanism 5, the detection platform 4, and the seismic support 6 to be tested installed on the detection platform 4. The support platform 3 transmits the vibration generated by the vibration simulator 2 to the seismic support 6 installed on the detection platform 4, so that the seismic support 6 can be subjected to vibrations that are more similar to those of actual earthquakes.

[0059] The support platform 3, lifting mechanism 5, and testing platform 4 can transmit vibrations to the seismic brace 6, simulating the seismic resistance of the installation position when the seismic brace 6 is actually used. Furthermore, the lifting mechanism 5 can adjust the height of the testing platform 4 relative to the support platform 3 to meet the requirements for testing the seismic resistance performance of the seismic brace 6 at different hoisting heights, thereby improving the accuracy of the seismic resistance performance test.

[0060] In one embodiment, the lifting mechanism 5 includes:

[0061] The fixing cylinder 510 is installed on the top surface of the support platform 3;

[0062] The lifting rod 520 is connected to the detection platform 4 at its top end and has a first plug 530 at its bottom end. The first plug 530 is slidably connected inside the fixed cylinder 510.

[0063] The drive locking part is used to drive the lifting rod 520 to move up and down and fix the height of the lifting rod 520.

[0064] The working principle and beneficial effects of the above technical solution are as follows: The drive locking part is used to drive the lifting rod 520 to slide within the fixed cylinder 510 to adjust the height of the detection table 4. The drive locking part is hydraulically or pneumatically driven to control the first plug 530 to slide within the fixed cylinder 510, thereby driving the lifting rod 520 to move. After the height is adjusted, the drive locking part can also fix the height of the lifting rod 520 to prevent the lifting rod 520 from shifting under vibration during vibration simulation, which would cause deviation in the detection results.

[0065] In addition, by adopting the above driving method, damage to the drive locking part caused by vibration can be avoided, thereby extending the service life of the drive locking part.

[0066] In one embodiment, the drive locking part includes:

[0067] The first driving cavity 540 is formed in the fixed cylinder 510 on the side of the first plug 530 away from the lifting rod 520;

[0068] The driving body is connected to the first driving cavity 540 and is used to change the volume of the first driving cavity 540.

[0069] A locking mechanism 550 is located at the top of the fixed cylinder 510 and is used to limit the lifting rod 520.

[0070] The bottom of the first drive chamber 540 is provided with a fluid inlet and a fluid outlet on both sides. A first check valve is provided at the fluid inlet and a second check valve is provided at the fluid outlet. Both the first check valve and the second check valve are connected to the drive body through a pipe.

[0071] The working principle and beneficial effects of the above technical solution are as follows: the volume of the first driving chamber 540 can be changed by gas or liquid, etc. The driving body introduces fluid into the first driving chamber 540 through the pipe and the first check valve from the fluid inlet. The fluid in the first driving chamber 540 is extracted from the fluid outlet through the pipe and the second check valve. The first check valve and the second check valve do not work at the same time.

[0072] When it is necessary to drive the lifting rod 520 to move upward, fluid is introduced into the first driving chamber 540. As the fluid is introduced, it will push the first plug 530 to drive the lifting rod 520 to move upward. When it is necessary to drive the lifting rod 520 to move downward, the fluid in the first driving chamber 540 is extracted. As the fluid decreases, the pressure in the first driving chamber 540 decreases, and the first plug 530 drives the lifting rod 520 to move downward.

[0073] The drive body does not contact the support base 1 and the support platform 3. The drive body is only connected to the first drive cavity 540 through a tube. The tube can be a flexible hose. In this way, when the vibration simulator 2 generates vibration, the drive body will not be damaged by the vibration, thus improving its service life.

[0074] In addition, after the height of the lifting rod 520 is adjusted, the volume of the first drive chamber 540 will not change. However, if the vibration simulator 2 generates vibration, since the first drive chamber 540 is filled with liquid or gas, which has compressibility, the lifting rod 520 may move up and down, thereby offsetting part of the vibration. The vibration effect transmitted to the detection table 4 will be reduced, affecting the detection effect of the anti-vibration performance. Therefore, the drive body needs to ensure that the volume of the first drive chamber 540 does not change in real time. This control is relatively complicated. Therefore, a locking mechanism 550 is set at the top of the fixed cylinder 510 to fix the lifting rod 520 after the height is adjusted. Thus, it is only necessary to close both the first one-way valve and the second one-way valve.

[0075] Through the above structural design, the drive body used to drive the lifting can be kept away from vibration to prevent damage caused by vibration. Furthermore, the locking mechanism 550 can fix the height of the lifting rod 520 without the drive body needing to maintain pressure in the first drive chamber 540, reducing the complexity of control and ensuring the stability of vibration transmission.

[0076] In one embodiment, the locking mechanism 550 is symmetrically arranged on both sides of the lifting rod 520, and the locking mechanism 550 includes:

[0077] The movable block 551 is rotatably connected to the mounting groove 511 provided at the top of the fixed cylinder 510; the bottom end of the movable block 551 is provided with a slot 552 on the side near the lifting rod 520.

[0078] The first spring 553 is connected between the slot 552 and the side wall of the mounting slot 511, and is used to generate a pushing force on the bottom end of the movable block 551.

[0079] The locking block 554 is located at the top of the movable block 551 near the lifting rod 520 and is used to engage and fix it with the lifting rod 520.

[0080] Furthermore, a permanent magnet is provided at the lower end of the side wall of the mounting groove 511 near the lifting rod 520, and an electromagnet is provided at the groove opening 552 to attract the permanent magnet; when the lifting rod 520 slides in the fixed cylinder 510, the electromagnet is energized and attracts the permanent magnet, causing the first spring 553 to be compressed, and the locking block 554 to disengage from the lifting rod 520.

[0081] The working principle and beneficial effects of the above technical solution are as follows: The middle part of the movable block 551 is rotatably connected to the mounting groove 511 through a pin. The locking block 554 is located above the pin, and the groove 552 is located below the pin. Under the action of no external force, the first spring 553 forms an outward pushing force on the bottom end of the movable block 551, thereby causing the top end of the movable block 551 to be subjected to a force that moves towards the lifting rod 520, so that the locking block 554 and the lifting rod 520 are locked together.

[0082] The locking block 554 and the lifting rod 520 are engaged to fix the height of the lifting rod 520. As a result, the lifting rod 520 will not move up and down due to vibration, preventing the lifting mechanism 5 from weakening the transmission of vibration and ensuring the reliability of vibration transmission.

[0083] Furthermore, by using an electromagnet and a permanent magnet to control the movement of the lifting rod 520, the lifting rod 520 is disengaged from the locking block 554 when it moves, thus not hindering the normal height adjustment of the lifting rod 520. When the height of the lifting rod 520 needs to be fixed, the electromagnet is de-energized, and under the action of the first spring 553, the locking block 554 engages with the lifting rod 520 and is fixed. The lifting adjustment process can be automatically controlled without manual adjustment, providing convenience for use.

[0084] In one embodiment, the locking block 554 has a first locking structure on the side near the lifting rod 520, and the lifting rod 520 has a second locking structure that cooperates with the first locking structure on its side.

[0085] The working principle and beneficial effects of the above technical solution: The first snap-fit ​​structure on the locking block 554 can be an internal thread, while the second snap-fit ​​structure on the corresponding lifting rod 520 can be an external thread on its outer side; the first snap-fit ​​structure can also be a protrusion, while the second snap-fit ​​structure on the corresponding lifting rod 520 can be a slot evenly distributed along the axial direction; of course, it can also be other matching snap-fit ​​structures.

[0086] Through the above structural design, the first and second locking structures will not cause the lifting rod 520 and the locking block 554 to disengage due to vibration, thus providing reliability for the transmission of vibration in the lifting mechanism 5.

[0087] In one embodiment, the bottom surface of the testing platform 4 is provided with a threaded hole 410, which is used to install the anti-seismic bracket 6.

[0088] The working principle and beneficial effects of the above technical solution are as follows: Figure 8The seismic brace 6 shown can be connected to the test bench 4 via threaded connections for both its vertical and diagonal supports. The top ends of the vertical and diagonal supports are simply connected to the threaded holes 410 on the bottom surface of the test bench 4 to complete the fixation, which is similar to the actual installation method of the seismic brace 6, ensuring the accuracy of the seismic performance test.

[0089] In one embodiment, the testing table 4 is further provided with a locking mechanism 7, which is used to form an auxiliary locking force for the connection between the anti-seismic bracket 6 and the threaded hole 410.

[0090] The working principle and beneficial effects of the above technical solution are as follows: Since the threaded connection between the seismic brace 6 and the test table 4 may also loosen due to vibration, in order to ensure the stability of the seismic performance testing process of the seismic brace 6, it is necessary to ensure the stability of the installation of the seismic brace 6 and the test table 4. Therefore, a locking mechanism 7 is set to ensure the stability of the threaded connection, thereby ensuring the stability of the testing process.

[0091] In one embodiment, the locking mechanism 7 includes:

[0092] The second driving cavity 710 is located above the threaded hole 410, and the threaded hole 410 and the second driving cavity 710 are connected.

[0093] The second plug body 720 is slidably disposed in the second driving cavity 710; the bottom surface of the second plug body 720 is connected to the connecting plate 740 through the first connecting rod 730;

[0094] The second spring 750 is disposed between the stepped surface formed by the threaded hole 410 and the second driving cavity 710 and the connecting plate 740;

[0095] The locking cavity 760 is provided on both sides of the threaded hole 410, and the two sides of the second driving cavity 710 are connected to the locking cavity 760 through the connecting cavity 770.

[0096] The locking block 780 is slidably disposed in the locking cavity 760. The side of the locking block 780 near the threaded hole 410 is an arc-shaped surface, and the arc-shaped surface is provided with an internal thread 781 corresponding to the threaded hole 410.

[0097] The third plug 790 is slidably disposed in the end of the communicating cavity 770 near the locking cavity 760, and the third plug 790 is connected to the locking block 780 through the second connecting rod.

[0098] The working principle and beneficial effects of the above technical solution are as follows: When installing the seismic brace 6, the top of the vertical or inclined support rod is screwed into the threaded hole 410. As it continues to be screwed in, the top of the support rod will exert an upward abutting force on the connecting plate 740, causing the second spring 750 to be stretched. At the same time, the connecting plate 740 drives the first connecting rod 730 to push the second plug 720 upward, so that the fluid (which can be liquid or gas, etc.) in the second driving cavity 710 and the fluid in the communicating cavity 770 connected to it are squeezed, thereby exerting a pushing force on the third plug 790. The third plug 790 drives the locking block 780 to move through the second connecting rod, so that the internal thread on the locking block 780 is locked with the external thread on the top of the seismic brace 6. That is, the top of the support rod threaded in the threaded hole 410 is subjected to radial locking force, thereby reducing the impact of vibration on the threaded connection and ensuring the stability of the seismic brace 6 installation.

[0099] Furthermore, under the elastic force of the second spring 750, the connecting plate 740 also forms an elastic abutment force at the top of the support rod of the seismic bracket 6, so that an elastic pre-tightening force is formed between the seismic bracket 6 and the test table 4, further reducing the impact of vibration on the threaded connection and ensuring the stability of the seismic performance testing process of the seismic bracket 6.

[0100] In one embodiment, the seismic brace 6 is mounted on the testing platform 4, and the seismic brace 6 is equipped with a pipe 8; it also includes:

[0101] The strain sensor is installed on the component to be tested in the seismic brace 6 to collect strain information on the component to be tested.

[0102] A vibration sensor is installed on pipe 8 to collect vibration information of pipe 8;

[0103] The detection and control terminal communicates with the strain sensor and vibration sensor to store and analyze strain information collected by the strain sensor before, during, and after the earthquake, as well as vibration information collected by the vibration sensor.

[0104] The working principle and beneficial effects of the above technical solution are as follows: After the seismic bracing 6 and the pipeline 8 are installed, they can be tested. Strain sensors are installed on the components of the seismic bracing 6 to be tested, such as each vertical support, diagonal support, horizontal support, and connecting nodes, to collect strain information on the components in real time and reflect the deformation generated by the components. Vibration sensors can be installed on the pipeline 8 to detect the vibration generated by the pipeline 8 in real time, thus evaluating the vibration reduction effect of the seismic bracing 6. The detection control terminal is used to store and analyze the sensor data before, during, and after the earthquake, and to evaluate the seismic performance of the seismic bracing 6 using this data.

[0105] In one embodiment, the strain sensor is provided with a strain probe and a temperature probe. The strain probe is used to detect the strain of the strain sensor, and the temperature probe is used to detect the temperature of the strain sensor and to perform temperature compensation on the strain value detected by the strain probe.

[0106] The strain value ε after temperature compensation is calculated using the following formula:

[0107]

[0108] Where Δd1k is the distance the strain probe moves when the strain sensor deforms, L is the strain measurement gauge length of the strain sensor, and P is the coefficient of variation of the strain of the strain sensor itself with temperature. G represents the strain value generated by the temperature probe when the temperature changes, where G is the strain value generated by the temperature probe when the temperature changes by 1 degree Celsius.

[0109] Furthermore, the method for determining the true strain value of the strain sensor after temperature compensation is as follows:

[0110] Step 1: Obtain the first image when the strain sensor is in its initial state, and mark the center point coordinates (x1, y1) of the strain probe and the center point coordinates (x2, y2) of the detection stage 4 in the first image;

[0111] Step 2: Obtain a second image when the strain sensor deforms, and mark the coordinates of the center point of the strain probe (x1) in the second image. ′ ,y1 ′ ) and the center point coordinates (x2) of the detection platform 4 ′ ,y2 ′ );

[0112] Step 3: Obtain the distance Δd1 that the strain probe moves in the first and second images:

[0113]

[0114] Step 4: Similarly, the distance Δd2 that the temperature probe moves when the strain sensor experiences a temperature change can be obtained;

[0115] Step 5: Calculate the strain value of the temperature probe when the temperature changes. for:

[0116]

[0117] Wherein, L1 is the distance from the center point marked on the temperature probe to the end of the temperature probe, k is the actual distance represented by one pixel, and Δd2k is the actual distance the temperature probe moves.

[0118] When the temperature changes from T1 to T2, the constant G is defined as the strain value of the probe when the temperature changes by 1 degree Celsius, and its formula is:

[0119]

[0120] Step 6: After the temperature changes from T1 to T2, the strain value ε measured by the strain sensor is obtained. c for:

[0121]

[0122] Where L is the strain measurement gauge length of the strain sensor, and Δd1k is the actual distance the strain probe moves;

[0123] Step 7: Establish a linear relationship between the strain value and temperature. Then, the strain value ε0 generated by the strain sensor itself is:

[0124] ε0=PΔT

[0125] Where P is the coefficient of variation of the strain of the strain sensor itself caused by temperature and temperature, and ΔT is any temperature change value within the range of T1 to T2.

[0126] After temperature compensation, the true strain value ε of the component under test detected by the strain sensor is:

[0127]

[0128] The working principle and beneficial effects of the above technical solution: The temperature probe is set on the strain sensor. The setting position must ensure that the temperature probe will not move with the deformation of the structure, but will only deform with the change of ambient temperature.

[0129] During testing, a strain sensor is installed on the component under test. As the component deforms under stress, the strain probe of the strain sensor moves a distance, thus obtaining the strain value. The temperature probe does not move due to structural deformation. Therefore, the temperature compensation formula for the strain sensor can be obtained through the above method. Then, during testing, the strain value of the component under test detected by the strain sensor can be obtained by combining the above formula with the changes in ambient temperature, ensuring the accuracy of strain value detection.

[0130] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0131] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0132] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A seismic performance testing device for seismic bracing, characterized in that, include: A support base (1) is provided with a vibration simulator (2) for providing a vibration source. A support platform (3) is set on top of the vibration simulator (2); The testing platform (4) is connected to the top surface of the support platform (3) via a lifting mechanism (5) for installing the anti-seismic bracket (6). The bottom surface of the testing platform (4) is provided with a threaded hole (410), which is used to install the anti-seismic bracket (6). The testing platform (4) is also provided with a locking mechanism (7), which is used to form an auxiliary locking force for the connection between the anti-seismic bracket (6) and the threaded hole (410); The locking mechanism (7) includes: The second drive cavity (710) is located above the threaded hole (410), and the threaded hole (410) and the second drive cavity (710) are connected. The second plug (720) is slidably disposed in the second drive cavity (710); the bottom surface of the second plug (720) is connected to a connecting plate (740) via a first connecting rod (730). The second spring (750) is disposed between the stepped surface formed by the threaded hole (410) and the second drive cavity (710) and the connecting plate (740); The locking cavity (760) is located on both sides of the threaded hole (410), and the two sides of the second driving cavity (710) are connected to the locking cavity (760) through the connecting cavity (770); The locking block (780) is slidably disposed in the locking cavity (760). The side of the locking block (780) near the threaded hole (410) is an arc-shaped surface, and the arc-shaped surface is provided with an internal thread (781) corresponding to the threaded hole (410). The third plug (790) is slidably disposed in one end of the communicating cavity (770) near the locking cavity (760), and the third plug (790) is connected to the locking block (780) through the second connecting rod; The lifting mechanism (5) includes: A fixed cylinder (510) is installed on the top surface of the support platform (3); The lifting rod (520) is connected to the testing platform (4) at its top end and has a first plug (530) at its bottom end. The first plug (530) is slidably connected inside the fixed cylinder (510). The drive locking part is used to drive the lifting rod (520) to move up and down and fix the height of the lifting rod (520); The drive locking part includes: The first drive cavity (540) is formed in the fixed cylinder (510) on the side of the first plug (530) away from the lifting rod (520); The driving body is connected to the first driving cavity (540) and is used to change the volume of the first driving cavity (540); A locking mechanism (550) is provided at the top of the fixed cylinder (510) and is used to limit the lifting rod (520); The locking mechanism (550) is symmetrically arranged on both sides of the lifting rod (520), and the locking mechanism (550) includes: The movable block (551) is rotatably connected to the mounting groove (511) provided at the top of the fixed cylinder (510); the bottom end of the movable block (551) is provided with a slot (552) on the side near the lifting rod (520). The first spring (553) is connected between the slot (552) and the side wall of the mounting slot (511) to generate a pushing force on the bottom end of the movable block (551); The locking block (554) is located at the top of the movable block (551) near the lifting rod (520) and is used to engage and fix it with the lifting rod (520).

2. The seismic performance testing device for seismic bracing according to claim 1, characterized in that, The locking block (554) has a first locking structure on the side near the lifting rod (520), and the side of the lifting rod (520) has a second locking structure that cooperates with the first locking structure.

3. The seismic performance testing device for seismic bracing according to claim 1, characterized in that, The seismic bracing (6) is installed on the testing platform (4), and a pipe (8) is installed on the seismic bracing (6); it also includes: A strain sensor is installed on the component to be tested in the seismic brace (6) to collect strain information on the component to be tested; A vibration sensor is installed on the pipe (8) to collect vibration information of the pipe (8); The detection and control terminal communicates with the strain sensor and vibration sensor to store and analyze strain information collected by the strain sensor before, during, and after the earthquake, as well as vibration information collected by the vibration sensor.

4. The seismic performance testing device for seismic bracing according to claim 3, characterized in that, The strain sensor is equipped with a strain probe and a temperature probe. The strain probe is used to detect the strain of the strain sensor, and the temperature probe is used to detect the temperature of the strain sensor and to perform temperature compensation on the strain value detected by the strain probe.

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