A method and device for evaluating the detection result of a compression-shear testing machine and the compression-shear testing machine

Abstract

The application provides a method and device for evaluating the detection result of a compression-shear testing machine, and the compression-shear testing machine, and belongs to the technical field of compression-shear testing. The compression-shear testing machine acquires a horizontal force through a first pressure sensor. The evaluation method uses an evaluation device to evaluate the detection result of the compression-shear testing machine. The evaluation device is arranged between an isolation bearing and a machine base / vertical loading equipment to detect the horizontal force received by the isolation bearing. The evaluation method comprises the following steps: S1: starting the vertical loading equipment to load the isolation bearing to a preset load; S2: starting a horizontal loading equipment to drive the machine base to move; S3: synchronously reading a first pressure value of the first pressure sensor and a second pressure value detected by the evaluation device; and S4: evaluating the detection result of the compression-shear testing machine based on the first pressure value and the second pressure value. The evaluation method provided by the application can obtain a second pressure value closer to the true value, and the first pressure value measured by the compression-shear testing machine can be evaluated through the second pressure value.

Description

Technical Field

[0001] This invention belongs to the field of compression-shear testing technology, specifically relating to a method, apparatus, and compression-shear testing machine for evaluating the test results of a compression-shear testing machine. Background Technology

[0002] Seismic isolation bearings are important structures used to reduce the transmission of seismic energy to building structures. They play a crucial role in protecting the safety and functionality of buildings, bridges, and railways during earthquakes. Shear performance is an important indicator for evaluating the performance of seismic isolation bearings; therefore, they must undergo shear performance testing and verification before leaving the factory and after arriving at the construction site.

[0003] The shear performance of seismic isolation bearings is obtained by measuring the magnitude of the horizontal force when they undergo lateral deformation. A compression-shear testing machine is an instrument used to test the shear performance of seismic isolation bearings. Existing compression-shear testing machines place the seismic isolation bearings on the machine base. After the vertical loading device applies a vertical load to the seismic isolation bearings, the horizontal loading device drives the machine base laterally. The driving force of the horizontal loading device on the machine base is measured, and this driving force is taken as the horizontal force on the seismic isolation bearings.

[0004] However, in existing measurement methods, the detected lateral force includes not only the force on the seismic isolation bearing, but also the frictional force on the machine base when it moves. This makes the detected lateral force much greater than the horizontal force on the seismic isolation bearing itself, resulting in significant distortion of the test results. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide a method, apparatus and compression-shear testing machine for evaluating the test results, in order to solve the problem of distortion of the shear performance of seismic isolation bearings detected by the compression-shear testing machine.

[0006] This invention provides a method for evaluating the test results of a compression-shear testing machine, using an evaluation device to evaluate the test results of the compression-shear testing machine; The compression-shear testing machine includes a vertical loading device, a machine base, a horizontal loading device, a first pressure sensor, and a guide rail structure. The vibration isolation support is located between the machine base and the vertical loading device. The first pressure sensor detects the force applied by the horizontal loading device to the machine base. The evaluation device is positioned between the seismic isolation bearing and the machine base / vertical loading device to detect the horizontal force on the seismic isolation bearing; The evaluation method includes: S1: Activate the vertical loading device to apply a preset load to the seismic isolation bearing; S2: Start the horizontal loading device and drive the machine base to move; S3: Simultaneously read the first pressure value from the first pressure sensor and the second pressure value detected by the evaluation device; S4: Evaluate the test results of the compression-shear testing machine based on the first pressure value and the second pressure value.

[0007] In some embodiments, step S3 includes: synchronously reading a plurality of the first pressure values ​​and a plurality of the second pressure values ​​based on a time sequence; Step S4 includes: calculating the average / maximum value based on the plurality of first pressure values ​​and the plurality of second pressure values ​​respectively, and evaluating the test results of the compression-shear testing machine based on the average / maximum value of the first pressure values ​​and the second pressure values.

[0008] In some embodiments, a deviation ratio is calculated based on the maximum / average value of the first pressure value and the second pressure value, and the test results of the compression-shear testing machine are evaluated using the deviation ratio.

[0009] In some embodiments, the evaluation apparatus includes: The upper and lower panels that are opposite each other on the board surface; The three-bar linkage includes an upper linkage, a middle linkage, and a lower linkage that are hinged in sequence. The upper linkage and the lower linkage are staggered in the vertical direction. The upper linkage is connected to the upper plate, and the lower linkage is connected to the lower plate. A second pressure sensor is installed on the intermediate connecting rod to detect the axial pressure on the intermediate connecting rod; The second pressure value is obtained based on the second pressure sensor.

[0010] The present invention also provides an apparatus for evaluating the test results of a compression-shear testing machine, applicable to the evaluation method of any embodiment of the present invention, the evaluation apparatus comprising: The upper and lower panels that are opposite each other on the board surface; The three-bar linkage includes an upper linkage, a middle linkage, and a lower linkage that are hinged in sequence. The upper linkage and the lower linkage are staggered in the vertical direction. The upper linkage is connected to the upper plate, and the lower linkage is connected to the lower plate. A second pressure sensor is installed on the intermediate connecting rod to detect the axial pressure on the intermediate connecting rod.

[0011] In some embodiments, the evaluation device further includes a vertical support, one end of which abuts against the lower plate and the other end of which abuts against the upper plate.

[0012] In some embodiments, there are two three-link links, with the two three-link links located on opposite sides of the vertical support body, and the middle link of the two three-link links arranged parallel to each other.

[0013] In some embodiments, the evaluation device further includes a plurality of multi-link structures, one end of which is connected to the upper plate and the other end of which is connected to the lower plate. The upper plate and the lower plate connected by the multi-link structures have at least one degree of freedom along the length direction of the intermediate link.

[0014] In some embodiments, the multi-link structure is a four-link structure, which includes a first link, a second link, a third link, and a fourth link that are hinged in sequence, wherein the first link is connected to the upper plate, and the fourth link is connected to the lower plate; There are multiple four-bar links, and every two four-bar links form a group; The evaluation device also includes a balance link, the two ends of which are respectively hinged to two of the four-bar linkages in the same group. The hinged connection is such that the balance link is hinged to the second link and / or the third link, and the balance link is arranged parallel to the intermediate link.

[0015] The present invention also provides a compression-shear testing machine, including a device for evaluating the test results of the compression-shear testing machine according to any embodiment of the present invention. Beneficial effects

[0016] The method for evaluating the test results of a compression-shear testing machine provided by the present invention obtains a second pressure value that is closer to the true value by setting an evaluation device between the seismic isolation support and the machine base (or vertical loading device) that can directly detect the horizontal force on the seismic isolation support. This second pressure value can be used to evaluate the first pressure value measured by the compression-shear testing machine, thereby correcting the test results of the compression-shear testing machine and making the corrected test results closer to the true value.

[0017] The evaluation device provided by this invention for evaluating the test results of a compression-shear testing machine has an upper plate and a lower plate that abut against a seismic isolation support and a vertical loading device (or machine base), respectively. The horizontal force on the seismic isolation support is transmitted between the upper and lower plates, forming the axial pressure of the intermediate connecting rod. Neither the seismic isolation support nor the evaluation device slides, and no friction is generated. Therefore, the pressure detected by the second pressure sensor eliminates the friction of the machine base and is closer to the true value of the horizontal force on the seismic isolation support. Through this second pressure value, the horizontal force detected by the compression-shear testing machine can be evaluated, and the horizontal force detected by the compression-shear testing machine can be corrected to improve the detection accuracy. Attached Figure Description

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the compression-shear testing machine and evaluation device according to an embodiment of the present invention; Figure 2 This is a flowchart of the method for evaluating the test results of the compression-shear testing machine according to an embodiment of the present invention; Figure 3 This is a flowchart of another method for evaluating the test results of a compression-shear testing machine according to an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the evaluation device according to an embodiment of the present invention; Figure 5 This is a three-dimensional schematic diagram of the evaluation device structure according to an embodiment of the present invention; Figure 6 This is a longitudinal sectional view of the evaluation device according to an embodiment of the present invention; Figure 7 This is another longitudinal sectional view of the evaluation device according to an embodiment of the present invention.

[0020] Figure label: 11. Vertical loading device; 12. Machine base; 2. Vibration isolation support; 31. Upper plate; 32. Lower plate; 331. Upper connecting rod; 332. Middle connecting rod; 333. Lower connecting rod; 34. Second pressure sensor; 35. Vertical load-bearing body; 361. First connecting rod; 362. Second connecting rod; 363. Third connecting rod; 364. Fourth connecting rod; 37. Balance connecting rod; 381. First half connecting rod; 382. Second half connecting rod. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The principles and features of the present invention are described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0022] Seismic isolation bearings are important structures used to reduce the transfer of seismic energy to building structures, and shear performance is a crucial performance indicator of seismic isolation bearings. The shear performance of seismic isolation bearings is generally tested using a compression-shear testing machine.

[0023] Figure 1 This is a three-dimensional structural diagram of the compression-shear testing machine and evaluation device according to an embodiment of the present invention, as shown below. Figure 1 As shown, a compression-shear testing machine generally includes a vertical loading device 11, a machine base 12, a horizontal loading device, a first pressure sensor, and a guide rail structure. The seismic isolation bearing 2 is located between the machine base 12 and the vertical loading device 11. The first pressure sensor detects the force applied to the machine base 12 by the horizontal loading device. In existing shear performance tests, the pressure detected by the first pressure sensor is considered as the horizontal force acting on the seismic isolation bearing, and the shear performance of the seismic isolation bearing 2 is calculated using the force detected by the first pressure sensor.

[0024] This disclosure proposes a method for evaluating the test results of a compression-shear testing machine, using an evaluation device to assess the test results. The evaluation device is positioned between the seismic isolation bearing 2 and the machine base 12 to detect the horizontal force acting on the seismic isolation bearing 2.

[0025] As another implementation, the evaluation device can also be placed between the seismic isolation bearing 2 and the vertical loading device 11.

[0026] As one implementation method, the first pressure sensor can be a pressure sensor or a tension / compression sensor.

[0027] Figure 2 This is a flowchart of the method for evaluating the test results of a compression-shear testing machine according to an embodiment of the present invention. In some embodiments, such as... Figure 2 As shown, the evaluation methods include: S1: Start the vertical loading device to load the seismic isolation bearing to the preset load; S2: Start the horizontal loading device to move the machine base; S3: Simultaneously read the first pressure value from the first pressure sensor and the second pressure value detected by the evaluation device; S4: Evaluate the test results of the compression-shear testing machine based on the first and second pressure values.

[0028] The first pressure value detected by the first pressure sensor of the compression-shear testing machine includes both the horizontal force acting on the seismic isolation bearing 2 and the resistance forces such as friction between the machine base 12 and the guide rail. Therefore, the shear performance of the seismic isolation bearing 2 calculated based on the first pressure value will deviate from the true value. The evaluation device, located between the machine base 12 and the vertical loading device 11, does not move relative to the machine base 12 and the vertical loading device 11. Therefore, the second pressure value detected by the evaluation device is significantly closer to the true value of the horizontal force acting on the seismic isolation bearing 2, and the shear performance of the seismic isolation bearing 2 calculated based on the second pressure value is also significantly closer to the true value. Furthermore, because there is an arithmetic correlation between the horizontal force and the shear performance of the seismic isolation bearing 2, the test results of the compression-shear testing machine can be evaluated using the second and first pressure values ​​to obtain the deviation of the test results, and thus the test results can be corrected.

[0029] The evaluation of the test results of the compression-shear testing machine can also serve as an evaluation of the testing performance of the compression-shear testing machine, thereby enabling the correction of the test results and ultimately obtaining more accurate shear performance.

[0030] The testing and evaluation method disclosed herein allows for the evaluation of a compression-shear testing machine using fewer evaluation devices than the number of compression-shear testing machines, thereby enabling a general correction of the test results of the compression-shear testing machine.

[0031] The second pressure value refers to the horizontal force detected by the evaluation device.

[0032] Steps S1 and S2 are typical testing procedures of a compression-shear testing machine, and their specific operation methods are existing technologies, which will not be elaborated upon in this disclosure.

[0033] This disclosure evaluates the test results of the compression-shear testing machine based on a first pressure value and a second pressure value, rather than directly using the second pressure value to calculate the shear performance of the seismic isolation bearing. The advantage is that a single evaluation device can be used to evaluate multiple compression-shear testing machines. After evaluation, the results can be used to correct and calibrate multiple machines without relying on the evaluation device. This evaluation method improves the testing accuracy of existing compression-shear testing machines without requiring modifications.

[0034] Figure 3 This is a flowchart of another method for evaluating the test results of a compression-shear testing machine according to an embodiment of the present invention. In some embodiments of this disclosure, such as... Figure 3 As shown, step S3 includes: synchronously reading multiple first pressure values ​​and multiple second pressure values ​​based on time sequence. Step S4 includes: calculating the average value based on the multiple first pressure values ​​and multiple second pressure values ​​respectively, and evaluating the test results of the compression-shear testing machine based on the average value of the first pressure values ​​and the second pressure values.

[0035] Simultaneously acquiring the first and second pressure values ​​ensures a correspondence between them, thus accurately reflecting the deviation between the two values. Calculating the average value based on multiple data points improves the representativeness of the evaluation results.

[0036] In some embodiments, the maximum value can be used instead of the average value for evaluation.

[0037] In some embodiments of this disclosure, a deviation ratio is calculated based on the average of the first pressure value and the second pressure value, and this deviation ratio is used to evaluate the test results of the compression-shear testing machine. This deviation ratio can be used as a correction factor for the test results of the compression-shear testing machine, thereby correcting the test results in subsequent compression-shear tests.

[0038] One method for calculating the deviation ratio is: Deviation ratio = (First pressure value - Second pressure value) / First pressure value.

[0039] As another way to calculate the deviation ratio, the deviation ratio = (first pressure value - second pressure value) / second pressure value.

[0040] Figure 4 This is a three-dimensional structural diagram of the evaluation device according to an embodiment of the present invention. Figure 5This is a three-dimensional schematic diagram of the evaluation device according to an embodiment of the present invention. Figure 6 This is a longitudinal sectional view of the evaluation device according to an embodiment of the present invention. In some embodiments of this disclosure, such as... Figure 4 , Figure 5 and Figure 6 As shown, the evaluation device includes an upper plate 31, a lower plate 32, a three-bar linkage, and a second pressure sensor 34. The upper plate 31 and lower plate 32 are vertically opposite each other. The three-bar linkage includes an upper connecting rod 331, a middle connecting rod 332, and a lower connecting rod 333, which are hinged sequentially. The upper connecting rod 331 and the lower connecting rod 333 are vertically offset. The upper connecting rod 331 is connected to the upper plate 31, and the lower connecting rod 333 is connected to the lower plate 32. The second pressure sensor 34 is located on the middle connecting rod 332 to detect the axial pressure on the middle connecting rod 332.

[0041] The three-link rod connects the upper plate 31 and the lower plate 32. The horizontal force on the seismic isolation support 2 is transmitted through the three-link rod. The axial pressure detected by the second pressure sensor 34, which is located in the middle link 332, is close to the horizontal force on the seismic isolation support 2.

[0042] By obtaining the second pressure value based on the second pressure sensor, the second pressure value can be made close to the true value of the horizontal force on the seismic isolation bearing 2.

[0043] The method for obtaining the second pressure value based on the second pressure sensor is to use the sum of the pressure values ​​detected by all the second pressure sensors as the second pressure value. For example: If the evaluation device includes only one second pressure sensor, the value detected by this second pressure sensor is taken as the second pressure value; if the evaluation device includes two second pressure sensors, the sum of the values ​​detected by these two pressure sensors is taken as the second pressure value; if the evaluation device includes multiple second pressure sensors, the sum of the values ​​detected by all the second pressure sensors is taken as the second pressure value.

[0044] Based on the apparatus for evaluating the test results of the compression-shear testing machine disclosed herein, the test results of the compression-shear testing machine were evaluated, and four tests were conducted, recorded as follows: First experiment: Test conditions: (1) Seismic isolation bearing 300mm, horizontal displacement 53mm (rubber layer thickness 53mm), vertical pressure 400kN (load 700kN under 10MPa vertical compressive stress).

[0045] (2) Evaluation device: dynamic compression and shear testing machine (data acquisition frequency 1 time / 5s).

[0046] The experimental data obtained based on the above experimental conditions are shown in Table 1.

[0047] Table 1:

[0048] Second experiment: Test conditions: (1) Seismic isolation bearing 300mm, horizontal displacement 53mm (rubber layer thickness 53mm), vertical pressure 400kN (load 700kN under 10MPa vertical compressive stress).

[0049] (2) Evaluation device: dynamic compression and shear testing machine (data acquisition frequency 1 time / 1s).

[0050] The experimental data obtained based on the above experimental conditions are shown in Table 2.

[0051] Table 2:

[0052] Third experiment: Test conditions: (1) Use a seismic isolation bearing with a diameter of 400mm, a horizontal displacement of 73mm (rubber layer thickness of 73mm), and a vertical pressure of 400kN (confirm that no slippage occurs).

[0053] (2) Evaluation device: dynamic compression and shear testing machine (data acquisition frequency 1 time / 1s).

[0054] (3) The test was conducted for 10 laps, with a 30-minute interval between each lap.

[0055] The experimental data obtained based on the above experimental conditions are shown in Tables 3-1, 3-2 and 3-3.

[0056] Table 3-1:

[0057] Table 3-2:

[0058] Table 3-3:

[0059] Fourth experiment: Test conditions: (1) Use a 400mm diameter seismic isolation bearing with a horizontal displacement of 73mm (73mm rubber layer thickness) and a vertical pressure of 400kN (confirm that no slippage occurs).

[0060] (2) Evaluation device: dynamic compression and shear testing machine (data acquisition frequency 1 time / 1s).

[0061] (3) The test was conducted for 10 laps, with a 30-minute interval between each lap.

[0062] The experimental data obtained based on the above experimental conditions are shown in Tables 4-1, 4-2 and 4-3.

[0063] Table 4-1:

[0064] Table 4-2:

[0065] Table 4-3:

[0066] As demonstrated by the four tests above, the evaluation method disclosed herein can yield a stable deviation ratio. The deviation ratio of the compression-shear testing machine used for the evaluation test is approximately 16%. Based on this, in subsequent compression-shear tests, correcting the first pressure value detected by the compression-shear testing machine by 16% will yield a near-true value of the horizontal force on the seismic isolation bearing, eliminating the need for further evaluation equipment.

[0067] The calculation method for "deviation ratio" in Tables 1 to 4-3 is as follows: Deviation ratio = (average value of first pressure value - average value of second pressure value) / average value of second pressure value.

[0068] This disclosure also proposes an apparatus (hereinafter referred to as an evaluation apparatus) for evaluating the test results of a compression-shear testing machine, which can be applied to the evaluation method of any embodiment of this disclosure.

[0069] In some embodiments of this disclosure, such as Figure 4 , Figure 5 and Figure 6 As shown, the evaluation device includes an upper plate 31, a lower plate 32, a three-bar linkage, and a second pressure sensor 34. The upper plate 31 and lower plate 32 are arranged vertically opposite each other. The three-bar linkage includes an upper connecting rod 331, a middle connecting rod 332, and a lower connecting rod 333, which are hinged sequentially. The upper connecting rod 331 and the lower connecting rod 333 are vertically offset. The upper connecting rod 331 is connected to the upper plate 31, and the lower connecting rod 333 is connected to the lower plate 32. The second pressure sensor 34 is located on the middle connecting rod 332 to detect the axial pressure on the middle connecting rod 332.

[0070] In the embodiments of this disclosure, a three-bar linkage connects the upper plate 31 and the lower plate 32. The upper plate 31 or the lower plate 32 directly abuts against the seismic isolation bearing 2. Therefore, the horizontal force on the three-bar linkage is the same as that on the seismic isolation bearing 2, and the axial pressure on the middle linkage 332 is close to the horizontal force on the seismic isolation bearing 2. Based on this, the test results of the compression-shear testing machine can be evaluated using the second pressure value detected by the second pressure sensor 34 and the pressure value detected by the compression-shear testing machine (i.e., the first pressure value).

[0071] In some embodiments of this disclosure, such as Figure 6 As shown, when acquiring the second pressure sensor 34, the intermediate connecting rod 332 is kept horizontal so that the axial pressure of the intermediate connecting rod 332 is closer to the horizontal force of the seismic isolation support 2.

[0072] In one embodiment, the intermediate connecting rod 332 includes a first half-connecting rod 381 and a second half-connecting rod 382, ​​and a second pressure sensor 34 is disposed between the first half-connecting rod 381 and the second half-connecting rod 382 to detect the axial pressure between the first half-connecting rod 381 and the second half-connecting rod 382.

[0073] As another implementation, the second pressure sensor 34 can be a strain gauge pressure sensor, which is attached axially to the intermediate connecting rod 332 to detect the axial pressure on the intermediate connecting rod 332.

[0074] During shear testing, the evaluation device can be placed between the machine base 12 and the vertical loading device 11. In one embodiment, the evaluation device can be placed between the machine base 12 and the seismic isolation support 2, with the upper plate 31 abutting against the seismic isolation support 2 and the lower plate 32 abutting against the machine base 12. In another embodiment, such as... Figure 1 As shown, the evaluation device can be placed between the seismic isolation bearing 2 and the vertical loading device 11, with the upper plate 31 directly or indirectly abutting the vertical loading device 11 and the lower plate 32 abutting the seismic isolation bearing 2.

[0075] As one implementation, the upper plate 31 and the lower plate 32 can be interchanged.

[0076] In some embodiments of this disclosure, such as Figure 1 , Figure 4 and Figure 5 As shown, the evaluation device also includes a vertical support 35, one end of which abuts against the lower plate 32 and the other end against the upper plate 31. The vertical support 35 can support the upper plate 31 and the lower plate 32, preventing damage to the upper plate 31, the lower plate 32 and the three-linkage rod.

[0077] The vertical load-bearing body 35 can be made of a material with extremely low horizontal stiffness and extremely high vertical stiffness.

[0078] The hinged structure of the three-bar linkage can adapt to the vertical height of the vertical support 35 when the vertical support 35 is subjected to longitudinal compression. The three-bar linkage does not need to bear the vertical load applied by the vertical loading device 11, thus avoiding damage to the three-bar linkage due to the vertical load.

[0079] In some embodiments of this disclosure, the upper plate 31, the lower plate 32 and the compression-shear testing machine and the seismic isolation support 2 can be fixed by means of friction between the contact surfaces, or by means of bolts or other structures.

[0080] In some embodiments, the upper link 331, the middle link 332, and the lower link 333 in the three-bar structure are located in the same plane, and their hinge axes are perpendicular to this plane.

[0081] In some embodiments of this disclosure, such as Figure 4 and Figure 5 As shown, there are two three-link linkages, which are located on both sides of the vertical support body 35, and the middle link 332 of the two three-link linkages are arranged in parallel relative to each other.

[0082] In the embodiments of this disclosure, a three-link rod is provided at each end of the vertical support 35, which can form a relatively stable connection structure in the horizontal direction and improve the structural stability.

[0083] In this embodiment, there are two three-bar linkages, and correspondingly, there are also two second sensors. Therefore, the sum of the pressure values ​​detected by the two second sensors is used as the second pressure value.

[0084] When testing the shear performance of the seismic isolation bearing 2, the evaluation device needs to be installed in a specific orientation. In one embodiment, the length direction of the intermediate connecting rod 332 is parallel to the driving direction of the horizontal loading device.

[0085] Figure 7 This is another longitudinal sectional view of the evaluation apparatus according to an embodiment of the present invention. In some embodiments of this disclosure, such as... Figure 5 and Figure 7 As shown, the evaluation device also includes a multi-link structure, one end of which is connected to the upper plate 31 and the other end to the lower plate 32. The upper plate 31 and the lower plate 32 connected by the multi-link structure have at least one degree of freedom along the length of the intermediate link 332.

[0086] In the embodiments of this disclosure, a multi-link structure is used to connect the upper plate 31 and the lower plate 32, which can improve the connection stability between the upper plate 31 and the lower plate 32. Furthermore, the connection between the upper plate 31 and the lower plate 32 is achieved through a multi-link structure, allowing the upper plate 31 and the lower plate 32 to have relative degrees of freedom. This avoids the multi-link structure bearing the horizontal force between the upper plate 31 and the lower plate 32 in the horizontal direction, ensuring that the horizontal force between the upper plate 31 and the lower plate 32 is entirely transmitted by the middle link 332 of the three-link system. This improves the accuracy of the second pressure sensor 34 in detecting the horizontal force on the seismic isolation support 2.

[0087] In some embodiments of this disclosure, such as Figure 5 and Figure 7As shown, the multi-link structure is a four-link system, comprising a first link 361, a second link 362, a third link 363, and a fourth link 364, which are hinged sequentially. The first link 361 is connected to the upper plate 31, and the fourth link 364 is connected to the lower plate 32. There are multiple four-link systems, with each pair of four-link systems forming a group. The evaluation device also includes a balance link 37, whose two ends are hinged to two four-link systems in the same group. The balance link 37 is hinged to the second link 362, and the balance link 37 is arranged parallel to the intermediate link 332.

[0088] By connecting the two four-bar linkages within the assembly via the balance link 37, the movements of the two four-bar linkages can be synchronized, thereby improving the stability of the upper plate 31 and lower plate 32 connected to the four-bar linkages and preventing the evaluation device from overturning under the combined action of vertical and horizontal loads.

[0089] The balance link 37 can also be hinged to the third link 363, or, as... Figure 5 and Figure 7 As shown, the balance link 37 can also be coaxially hinged with the second link 362 and the third link 363 at the same time.

[0090] In some embodiments of this disclosure, the first pressure value and the second pressure value can be obtained manually or by setting up a dedicated data processing, display and storage system in the evaluation device. This disclosure will not elaborate on this.

[0091] This disclosure also proposes a compression-shear testing machine, including an apparatus for evaluating the test results of the compression-shear testing machine according to any embodiment of this disclosure. Accordingly, the beneficial effects of the evaluation apparatus of this disclosure are also present in the compression-shear testing machine having such an evaluation apparatus, which will not be elaborated further in this disclosure.

[0092] In some embodiments, such as Figure 1 As shown, the compression-shear testing machine also includes a vertical loading device 11, a machine base 12, a guide rail structure, and a horizontal loading device. The seismic isolation support 2 is set between the machine base 12 and the vertical loading device 11. The evaluation device is installed between the seismic isolation support 2 and the machine base 12 (or the vertical loading device 11) for testing and evaluation.

[0093] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0094] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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.

[0095] 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 or an electrical connection; 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.

[0096] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for evaluating the test results of a compression-shear testing machine, characterized in that, The test results of the compression-shear testing machine were evaluated using an evaluation device; The compression-shear testing machine includes a vertical loading device, a machine base, a horizontal loading device, a first pressure sensor, and a guide rail structure. The vibration isolation support is located between the machine base and the vertical loading device. The first pressure sensor detects the force applied by the horizontal loading device to the machine base. The evaluation device is positioned between the seismic isolation bearing and the machine base / vertical loading device to detect the horizontal force on the seismic isolation bearing; The evaluation method includes: S1: Activate the vertical loading device to apply a preset load to the seismic isolation bearing; S2: Start the horizontal loading device and drive the machine base to move; S3: Simultaneously read the first pressure value from the first pressure sensor and the second pressure value detected by the evaluation device; S4: Evaluate the test results of the compression-shear testing machine based on the first pressure value and the second pressure value.

2. The method for evaluating the test results of a compression-shear testing machine according to claim 1, characterized in that, Step S3 includes: synchronously reading multiple first pressure values ​​and multiple second pressure values ​​based on time sequence; Step S4 includes: calculating the average / maximum value based on multiple first pressure values ​​and multiple second pressure values ​​respectively, and evaluating the test results of the compression-shear testing machine based on the average / maximum value of the first pressure values ​​and the second pressure values.

3. The method for evaluating the test results of a compression-shear testing machine according to claim 2, characterized in that, The deviation ratio is calculated based on the maximum / average value of the first pressure value and the second pressure value, and the test results of the compression-shear testing machine are evaluated based on the deviation ratio.

4. The method for evaluating the test results of a compression-shear testing machine according to any one of claims 1-3, characterized in that, The evaluation device includes: The upper and lower panels that are opposite each other on the board surface; The three-bar linkage includes an upper linkage, a middle linkage, and a lower linkage that are hinged in sequence. The upper linkage and the lower linkage are staggered in the vertical direction. The upper linkage is connected to the upper plate, and the lower linkage is connected to the lower plate. A second pressure sensor is installed on the intermediate connecting rod to detect the axial pressure on the intermediate connecting rod; The second pressure value is obtained based on the second pressure sensor.

5. A device for evaluating the test results of a compression-shear testing machine, characterized in that, The evaluation apparatus, applied to the evaluation method according to any one of claims 1-4, comprises: The upper and lower panels that are opposite each other on the board surface; The three-bar linkage includes an upper linkage, a middle linkage, and a lower linkage that are hinged in sequence. The upper linkage and the lower linkage are staggered in the vertical direction. The upper linkage is connected to the upper plate, and the lower linkage is connected to the lower plate. A second pressure sensor is installed on the intermediate connecting rod to detect the axial pressure on the intermediate connecting rod.

6. The apparatus for evaluating the test results of a compression-shear testing machine according to claim 5, characterized in that, The evaluation device also includes a vertical support body, one end of which abuts against the lower plate and the other end of which abuts against the upper plate.

7. The apparatus for evaluating the test results of a compression-shear testing machine according to claim 6, characterized in that, There are two three-link rods, which are located on both sides of the vertical support body, and the middle connecting rods of the two three-link rods are arranged in parallel relative to each other.

8. The apparatus for evaluating the test results of a compression-shear testing machine according to any one of claims 5-7, characterized in that, The evaluation device also includes multiple multi-link structures, one end of which is connected to the upper plate and the other end of which is connected to the lower plate. The upper plate and the lower plate connected by the multi-link structures have at least one degree of freedom along the length of the intermediate link.

9. The apparatus for evaluating the test results of a compression-shear testing machine according to claim 8, characterized in that, The multi-link structure is a four-link structure, which includes a first link, a second link, a third link, and a fourth link that are hinged in sequence. The first link is connected to the upper plate, and the fourth link is connected to the lower plate. There are multiple four-bar links, and every two four-bar links form a group; The evaluation device also includes a balance link, the two ends of which are respectively hinged to two of the four-bar linkages in the same group. The hinged connection is such that the balance link is hinged to the second link and / or the third link, and the balance link is arranged parallel to the intermediate link.

10. A compression-shear testing machine, characterized in that, The apparatus includes the device for evaluating the test results of a compression-shear testing machine as described in any one of claims 5-9.

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