Annular steel damping test device based on compression-shear testing machine

Abstract

The invention provides an annular steel damper testing device based on a compression-shear testing machine, which comprises an upper loading plate, a lower loading plate and a multidirectional sliding support, the upper end of the multidirectional sliding support is fixedly connected with the upper loading plate, and the lower end of the multidirectional sliding support is slidably connected with the lower loading plate for vertically supporting the upper loading plate and the lower loading plate. The compression-shear testing machine can be vertically loaded, so that the lower pressing plate of the testing machine is prevented from warping; an upper loading plate and a lower loading plate of the annular steel damper testing device are arranged to be consistent in longitudinal (X) and transverse (Y) mounting sizes; two-dimensional loading switching in the longitudinal direction (X) and the transverse direction (Y) when the annular steel damper testing device rotates by 90 degrees to be installed between the upper pressing plate and the lower pressing plate of the testing machine can be achieved, and the problems that an existing testing device needs to be redesigned and manufactured according to different loading directions, consumed time is long, and economic cost is high are solved.

Description

Technical Field

[0001] The invention relates to the technical field of steel damping and shock absorption, and in particular to a ring-shaped steel damper testing device based on a compression shear testing machine. Background Art

[0002] Annular steel dampers have the characteristics of simple structure, easy installation and replacement, little impact on the height of the supporting structure, the same deformation and energy dissipation and shock absorption can be achieved in any horizontal direction, they can effectively extend the structural period, provide stability and higher damping ratio, and can effectively control parameters such as damping force and horizontal displacement. Therefore, they are often used in bridge shock absorption.

[0003] Since the annular steel damper faces complex and changeable load conditions when working, strict test research is required before the annular steel damper is applied to verify its horizontal hysteresis performance and low-cycle fatigue performance to ensure that it can maintain excellent shock absorption and energy dissipation performance under various working conditions. However, during the test, since there is no lateral (Y) constraint between the upper platen of the compression shear test machine and the lower platen of the test machine, the annular steel damper has no lateral (Y) load. When the trolley pushes the annular steel damper forward, the lower platen of the test machine will produce different degrees of upward warping as the horizontal displacement increases, thereby affecting the accuracy of the test data.

[0004] Through searching, the patents related to the performance test of steel dampers are mainly the following: 1. The Chinese utility model patent with the authorization announcement number CN211205740U and the authorization announcement date of August 7, 2020, and the name of the patent is "A test device for a mild steel damper". The utility model discloses a test device for a mild steel damper, including four columns, a Jianyan crossbeam is fixed and slidably disposed between the four columns, and an actuator is rotatably connected between two columns, one end of the actuator is connected to an L beam through two ball joints, and the lower end of the L beam abuts against a damping wall, and a Jianyan four-bar linkage is disposed on the Jianyan crossbeam and the L beam. The utility model achieves the purpose of ensuring that the damping wall is always subjected to horizontal force when subjected to force and the accuracy of force loading through the cooperation between the Jianyan four-bar linkage and the L beam, while ensuring that the damping wall will not go out of the plane when subjected to force and will not be affected by lateral force. At the same time, it can be adjusted according to the height and other positions of the damping wall, so that there are more choices for the test space.

[0005] 2. The Chinese utility model patent with the authorization announcement number CN212030898U, the authorization announcement date of November 27, 2020, and the name of "A Test Device for a Mild Steel Damper". The present utility model discloses a test device for a mild steel damper, which relates to the technical field of testing equipment and includes: a pedestal; an installation assembly with an installation position inside for installing the mild steel damper. The lower end of the installation assembly is connected to the pedestal through a lower connecting plate, and the upper end of the installation assembly is connected to a loading device through an upper connecting plate. This device has a simple manufacturing process, is easy to process and form, has a low cost, and is convenient for transportation and installation. This device has a high test efficiency and strong applicability, and can meet the test requirements of various types of mild steel dampers.

[0006] 3. The Chinese utility model patent with the authorization announcement number CN206756436U, the authorization announcement date of December 15, 2017, and the name of "A Test Tool for E-shaped Steel Based on a Multifunctional Test Platform". The present utility model discloses a test tool for E-shaped steel based on a multifunctional test platform. Among them, the multifunctional test platform includes a trolley and an upper pressure plate. The tool includes an E-shaped steel, a terminal connecting seat, a first baffle, an upper support plate, a plate rubber bearing, an intermediate connecting seat, a pin shaft, a lower support plate, an inner hexagon screw, a heightening steel plate, and a second baffle. The pin shaft is used to align the E-shaped steel tool with the heightening steel plate, so that the E-shaped steel tool and the multifunctional test platform are combined into an integral whole. The tool of the present utility model is convenient for installation and disassembly for a single-piece E-shaped steel steel component, can be applicable to E-shaped steel tests with different hole diameters, has a certain generality, good economy, stable tests, and improves the effectiveness of data results.

[0007] 4. The Chinese invention with the authorization announcement number CN113218642B, the authorization announcement date of July 1, 2022, and the name of "A Test Method and Test Device for a Lateral Steel Damper". The present invention relates to a test method and test device for a lateral steel damper: by changing the test installation position of the lateral steel damper, the lateral shock absorption function test of the lateral steel damper is transformed into lateral loading; through the lateral loading method of a loading testing machine, the lateral shock absorption function test of the lateral steel damper is carried out. At the same time, a two-dimensional loading testing machine is used, which can not only perform lateral loading but also perform horizontal loading, so as to test the longitudinal horizontal sliding function of the lateral steel damper when generating lateral shock absorption. To detect whether the longitudinal horizontal sliding performance of the lateral steel damper is affected when generating lateral shock absorption. This detection method can be carried out using existing commonly used loading testing machines, is simple and convenient, easy to disassemble, replace and observe the V-shaped frame, improves the test efficiency, reduces the test cost, and at the same time improves the utilization rate of the existing loading testing machine.

[0008] Although the above patents all relate to the testing method and testing device for the lateral shock absorption function of steel dampers, none of them solve the problem of ensuring that the lower loading plate does not warp during the test.

[0009] In summary, how to provide an experimental device for an annular steel damper based on a compression-shear testing machine, which can ensure that the lower platen of the testing machine does not warp during the test, is a technical problem that urgently needs to be solved. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide, in view of the defects existing in the prior art, an experimental device for an annular steel damper based on a compression-shear testing machine, which can ensure that the lower loading plate does not warp during the test, so that the annular steel damper is always under the action of a lateral horizontal force without being affected by vertical warping during the test, and can also ensure the normal progress of the compression-shear test.

[0011] To solve the above technical problem, the technical solution adopted by the present invention is: an experimental device for an annular steel damper based on a compression-shear testing machine, including an upper loading plate and a lower loading plate, and further including a multi-directional sliding support. The upper end of the multi-directional sliding support is fixedly connected to the upper loading plate, and the lower end of the multi-directional sliding support is slidably connected to the lower loading plate.

[0012] Furthermore, the experimental device for an annular steel damper based on a compression-shear testing machine further includes a wear-resistant plate, and the wear-resistant plate is arranged on the lower end face of the multi-directional sliding support.

[0013] Furthermore, the lower loading plate is provided with a mirror stainless steel plate, and the surface of the wear-resistant plate close to the lower loading plate is coated with silicone grease, and the mirror stainless steel plate can be attached to the surface of the wear-resistant plate coated with silicone grease.

[0014] Furthermore, the wear-resistant plate is a modified ultra-high molecular weight polyethylene plate, and the initial static friction coefficient of the modified ultra-high molecular weight polyethylene plate against the mirror stainless steel plate is below 0.008.

[0015] Furthermore, the multi-directional sliding support is also provided with a flange, the flange is arranged along the circumference of the upper end face of the multi-directional sliding support, and the flange is provided with threaded through holes, and the axial direction of the threaded through holes is vertical (Z).

[0016] Furthermore, the upper loading plate and the lower loading plate are square plates with the same size. The same first U-shaped mounting holes are opened at the four corners of the upper loading plate and the lower loading plate, and the same second U-shaped mounting holes are opened at the midpoint positions of the four sides of the upper loading plate and the lower loading plate.

[0017] Further, the upper loading plate is connected to the upper pressure plate of the testing machine through a T-slot bolt, and the lower loading plate is connected to the lower pressure plate of the testing machine through a T-slot bolt; the T-slot bolt is adapted to the first U-shaped mounting hole and the second U-shaped mounting hole.

[0018] The beneficial effects of the present invention are as follows: (1) By arranging a multi-directional sliding support between the upper loading plate and the lower loading plate of the annular steel damper testing device, the present invention is used for the vertical support of the upper loading plate and the lower loading plate, enabling the vertical loading of the compression-shear testing machine and ensuring that the lower pressure plate of the testing machine does not warp.

[0019] (2) By setting the longitudinal (X) and transverse (Y) mounting dimensions of the upper loading plate and the lower loading plate of the annular steel damper testing device to be the same, the present invention can achieve the two-dimensional loading switching of longitudinal (X) and transverse (Y) after the annular steel damper testing device is rotated 90° and installed between the upper and lower pressure plates of the testing machine, solving the problems that the existing compression-shear testing machine device needs to be redesigned and manufactured for different loading directions, which is time-consuming and has a high economic cost.

[0020] (3) The upper loading plate and the lower loading plate of the annular steel damper testing device are connected to the testing machine by T-shaped groove bolts, which can realize the quick disassembly and assembly operation of the annular steel damper testing device and the compression-shear testing machine, which is convenient and fast. Description of the Drawings

[0021] Figure 1 is the front view of the annular steel damper testing device in the embodiment of the present invention; Figure 2 is Figure 1 the partial enlarged schematic view of A in Figure 3 is Figure 2 the partial enlarged schematic view of B in Figure 4 is the structural schematic view of the annular steel damper testing device after removing the upper loading plate in the embodiment of the present invention; Figure 5 is the side view of the annular steel damper testing device in the embodiment of the present invention; Figure 6 is the longitudinal (X) installation schematic view of the annular steel damper testing device in the embodiment of the present invention; Figure 7 is the transverse (Y) installation schematic view of the annular steel damper testing device in the embodiment of the present invention; Figure 8 is the structural schematic view of the upper loading plate in the embodiment of the present invention; Figure 9 is the structural schematic view of the lower loading plate in the embodiment of the present invention; In the figure: 1. Upper testing machine table, 2. Upper pressure plate of the testing machine, 3. Upper loading plate, 4. Ring steel damper, 5. Multi-directional sliding support, 6. Wear-resistant plate, 7. Lower loading plate, 71. Mirror stainless steel plate, 8. Lower pressure plate of the testing machine, 9. Lower testing machine table, 10. Trolley, 11. Actuator, 12. T-slot bolt, 13. First U-shaped mounting hole, 14. Second U-shaped mounting hole. Detailed implementation mode

[0022] To make the objectives, technical solutions and advantages of the embodiments of the invention clearer, the following will, with reference to the accompanying drawings of the embodiments of the present invention, Figures 1-9 describe the technical solutions of the embodiments of the invention clearly and completely. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0023] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as a limitation on the present invention; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0024] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. Embodiment

[0025] In the prior art, a compression-shear testing machine includes an upper testing machine table 1, a lower testing machine table 9, an upper pressure plate 2 of the testing machine, a lower pressure plate 8 of the testing machine and a trolley 10. The upper pressure plate 2 of the testing machine is connected to the upper testing machine table 1 and can move vertically (Z) up and down along with the upper testing machine table 1. The lower pressure plate 8 of the testing machine is fixed on the trolley, and the trolley is arranged on the guide rail of the lower testing machine table 9.

[0026] When conducting a compression-shear test, the upper test platform 1 of the compression-shear test machine is lowered to a predetermined height, the annular steel damper 4 is fixedly installed between the upper pressure plate 2 of the test machine and the lower pressure plate 8 of the test machine, and then the annular steel damper 4 is vertically (Z) loaded. Then, the actuator connected to the trolley is started, so that the test trolley is subjected to a longitudinal (X) thrust, causing the trolley to move longitudinally (X), and the lower pressure plate of the test machine also moves longitudinally (X) with the trolley, so that the annular steel damper 4 is subjected to longitudinal (X) loading stress, thereby obtaining test data.

[0027] In the embodiment of the present application, Figure 1 , Figure 2 and Figure 6 As shown, the annular steel damper test device of the present application includes an upper loading plate 3, a lower loading plate 7 and a multi-directional sliding support 5, the upper end of the multi-directional sliding support 5 is fixedly connected to the upper loading plate 3, the lower end of the multi-directional sliding support 5 is slidingly connected to the lower loading plate 7, the upper loading plate 3 is connected to the upper pressure plate of the testing machine, and the lower loading plate 7 is connected to the lower pressure plate of the testing machine.

[0028] During the test, because the multi-directional sliding support 5 is always vertically supported between the upper loading plate 3 and the lower loading plate 7, when the lower pressure plate 8 of the testing machine tends to warp, the multi-directional sliding support 5 can support the lower loading plate 7, thereby preventing the lower pressure plate 8 of the testing machine from warping; in addition, the lower end of the multi-directional sliding support 5 is slidably connected to the lower loading plate 7, thereby ensuring the normal progress of the compression and shear test.

[0029] like Figure 2 and Figure 3 As shown, the annular steel damper test device of the present application is also provided with a wear-resistant plate, and the wear-resistant plate 6 is arranged on the lower end surface of the multi-directional sliding support 5, and the lower end of the multi-directional sliding support 5 is slidably connected with the lower loading plate 7 through the wear-resistant plate 6. The excellent wear resistance is beneficial to ensure the service life of the multi-directional sliding support 5 of the test device.

[0030] like Figure 2 and Figure 3 As shown, the upper end surface of the lower loading plate 7 of the annular steel damper test device of the present application is provided with a mirror stainless steel plate 71, and the wear-resistant plate 6 is coated with engineering silicone grease on one side close to the lower loading plate 7. The silicone grease has a lubricating effect, and is used to reduce the sliding friction resistance generated between the multi-directional sliding support 5 and the lower loading plate 7 as much as possible during the test, so as to ignore the influence of this sliding friction resistance on the longitudinal (X) horizontal stress of the horizontal actuator 11, and ensure that the test results are more accurate.

[0031] The wear-resistant plate 6 is a modified ultra-high molecular weight polyethylene plate. The initial static friction coefficient of the modified ultra-high molecular weight polyethylene plate against the mirror stainless steel plate is below 0.008. Due to the excellent mechanical properties and lubricity of the modified ultra-high molecular weight polyethylene material, the wear-resistant plate 6 ensures its lubricity and service life during the test.

[0032] As Figure 1 、 Figure 2 and Figure 5 shown, the multi-directional sliding support 5 has a cylindrical part. A square flange is provided around the upper end surface of the cylindrical part. Threaded through holes are provided on the square flange, and the threaded through holes are arranged along the axial direction of the cylindrical part of the multi-directional sliding support 5. The multi-directional sliding support 5 is fixedly installed on the upper loading plate 3 by using the threaded through holes provided on the square flange. During the test, it is used to support between the upper loading plate 3 and the lower loading plate 7.

[0033] As Figure 8 and Figure 9 shown, the upper loading plate 3 and the lower loading plate 7 are square plates with the same size. First U-shaped mounting holes 13 of the same size are provided at the four corners of the upper loading plate 3 and the lower loading plate 7, and second U-shaped mounting holes 14 of the same size are provided at the midpoint positions of the four sides of the upper loading plate 3 and the lower loading plate 7. As Figure 7 shown, when the multi-ring steel damper 4 is longitudinally (X) loaded, it is equivalent to installing the longitudinal (X) ring steel damper test device as Figure 1 shown on the machine table of the compression-shear testing machine for test operation; as Figure 8 shown, when it is necessary to change the loading direction of the ring steel damper 4 for testing, only need to turn the ring steel damper 4 by 90° to change the longitudinal (X) to the transverse (Y), and then lock it by bolt connection to achieve the change from longitudinal (X) loading to transverse (Y) loading, and the conversion between longitudinal (X) loading and transverse (Y) loading can be realized. It solves the problems in the background technology that the existing test devices need to be redesigned and manufactured for different loading directions, which takes a long time and has a high economic cost.

[0034] As Figure 7 and Figure 8 shown, the upper loading plate is connected to the upper platen of the testing machine by T-slot bolts, and the lower loading plate is connected to the lower platen of the testing machine by T-slot bolts; the T-slot bolts are adapted to the first U-shaped mounting holes and the second U-shaped mounting holes. The U-shaped mounting holes 13 are set to cooperate with the T-slot bolts 12, so that before or after the test or when changing the loading direction between longitudinal (X) and transverse (Y), installation and disassembly can be carried out quickly, solving the problem of difficult disassembly and assembly in the background technology.

[0035] The above embodiments are only for illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical field can also make various changes or transformations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by each claim.

Claims

1. A ring-shaped steel damper test device based on a compression shear test machine, comprising an upper loading plate (3) and a lower loading plate (7), characterized in that: It also comprises a multi-directional sliding support (5), the upper end of the multi-directional sliding support (5) is fixedly connected to the upper loading plate (3), and the lower end of the multi-directional sliding support (5) is slidably connected to the lower loading plate (7).

2. The annular steel damper test device based on the compression shear test machine according to claim 1 is characterized in that: It also includes a wear-resistant plate (6), which is arranged on the lower end surface of the multi-directional sliding support (5), and the lower end of the multi-directional sliding support (5) is slidably connected to the lower loading plate (7) through the wear-resistant plate (6).

3. The annular steel damper test device based on the compression shear test machine according to claim 2 is characterized in that: The lower loading plate (7) is provided with a mirror stainless steel plate (71), a surface of the wear-resistant plate (6) close to the lower loading plate (7) is coated with silicone grease, and the mirror stainless steel plate (71) is bonded to the surface of the wear-resistant plate (6) coated with silicone grease.

4. The annular steel damper test device based on the compression shear test machine according to claim 3 is characterized in that: The wear-resistant plate (6) is a modified ultra-high molecular weight polyethylene plate, and the initial static friction coefficient of the modified ultra-high molecular weight polyethylene plate to the mirror stainless steel plate (71) is less than 0.

008.

5. The annular steel damper test device based on a compression shear test machine according to any one of claims 1 to 4, characterized in that: The multi-directional sliding support (5) is also provided with a flange, which is arranged along a circumference of the upper end surface of the multi-directional sliding support (5), and the flange is provided with a threaded through hole, and the axial direction of the threaded through hole is vertical (Z).

6. The annular steel damper test device based on the compression shear test machine according to claim 5 is characterized in that: The upper loading plate (3) and the lower loading plate (7) are square plates of the same size, and the same first U-shaped mounting holes are provided at the four corners of the upper loading plate (3) and the lower loading plate (7), and the same second U-shaped mounting holes are provided at the midpoints of the four sides of the upper loading plate (3) and the lower loading plate (7).

7. The annular steel damper test device based on the compression shear test machine according to claim 6 is characterized in that: The upper loading plate (3) is connected to the upper pressure plate (2) of the testing machine via T-slot bolts (12), and the lower loading plate (7) is connected to the lower pressure plate (8) of the testing machine via T-slot bolts (12); the T-slot bolts (12) are compatible with the first U-shaped mounting hole and the second U-shaped mounting hole.

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