A device for testing the seismic resistance of building components

Abstract

The present invention relates to the technical field of building component detection, and specifically discloses a building component seismic resistance testing device, comprising a base and two side frames fixedly installed on the top of the base and symmetrical front and back, a top plate commonly installed on the top of the two side frames, four rectangularly distributed guides commonly installed between the top plate and the base, a hydraulic cylinder 1 is fixedly installed on the top of the top plate, the output end of the hydraulic cylinder 1 slides through the top plate and is provided with a lifting and positioning unit, a multi-point shock unit, a synchronous drive unit and a rotating surface changing unit for carrying and rotating concrete beams and columns are provided between the lifting and positioning unit and the base, the present application carries out targeted simulation design for the two characteristics of seismic shear waves in the process of propagation, namely, directionality and intermittency, and the short-term stopping of the shock component in the process of adjusting the impact surface of the concrete beam and column simulates the intermittent period of seismic waves in the process of propagation.

Description

Technical Field

[0001] The invention relates to the technical field of building component detection, and more specifically, to a building component seismic resistance testing device. Background Art

[0002] Precast concrete beams and columns are the most common prefabricated building components. They are prefabricated from concrete in factories and then transported to the construction site for assembly. They have the advantages of fast construction speed, controllable quality, environmental protection and energy saving. As the main component of the building's load-bearing structure, the seismic resistance of precast concrete beams and columns directly affects the safety of the entire building. Therefore, precast concrete beams and columns must be tested for seismic performance after production to test their seismic performance.

[0003] At present, the common seismic test methods for precast concrete beams and columns are shaking table test and quasi-static test (low-cycle repeated loading test). The quasi-static test is to install the concrete precast parts on the test device and fix them. Then, the test surface of the building precast components is subjected to repeated horizontal force according to a certain displacement control mode through hydraulic loading equipment, etc., to simulate the repeated push-pull action of the precast concrete beam-column structure during an earthquake. The loading process is carried out periodically. In each loading cycle, the force borne by the precast parts and the corresponding displacement are recorded. At the same time, whether there are cracks on the surface of the precast parts, the development and extension of the cracks, etc. are observed. However, this test method still has certain defects: 1. At present, the quasi-static test only applies push-pull loads to the beams and columns at a single point, but the single-point push-pull load cannot verify the influence of different loading methods (different earthquake conditions, such as single-point loading can only simulate the simple waveform of the sine wave, and cannot simulate complex waveforms, etc.) on the beam-column structure, and it is difficult to simulate the influence of the beam-column structure when multiple points of the beams and columns are subjected to force at the same time in an actual earthquake, thereby reducing the reliability of the test results.

[0004] 2. At present, the quasi-static test usually only applies horizontal force periodically in a single direction, and the test surface of the beam and column is not adjusted during the test. However, since seismic waves will encounter new geological interfaces during propagation, resulting in reflection, refraction and scattering of seismic waves, an intermittent period will occur. At the same time, the push-pull direction of seismic waves may change after being reflected, refracted and scattered, which is multi-directional and intermittent. It does not only impact the test surface of the beam and column in a single direction. Therefore, applying horizontal force in a single direction cannot well simulate the multi-directionality of seismic shear waves. Summary of the invention

[0005] The invention provides a building component seismic resistance testing device, which solves the technical problems in the prior art that a single-point push-pull load cannot verify the influence of different loading modes on the beam-column structure and cannot well simulate the multi-directionality of seismic waves.

[0006] The invention provides a device for testing the seismic resistance of building components, comprising a base and two side frames fixedly installed on the top of the base and symmetrical in front and back, a top plate commonly installed on the top of the two side frames, four guide columns distributed in a rectangular shape commonly installed between the top plate and the base, a hydraulic cylinder 1 fixedly installed on the top of the top plate, an output end of the hydraulic cylinder 1 slides through the top plate and is provided with a lifting and positioning unit, a multi-point loading unit, a synchronous driving unit and a rotating surface changing unit for carrying and rotating concrete beams and columns are provided between the lifting and positioning unit and the base, the multi-point loading unit comprises a loading component and an adjusting component for adjusting the working state of the loading component, both the loading component and the adjusting component are provided with two left-right symmetrical components and distributed on both sides of the concrete beam and column, the synchronous driving unit comprises a synchronous component for connecting the left and right loading components, and the rotating surface changing unit comprises a surface changing component arranged on the base and a control component for controlling the surface changing component.

[0007] The loading assembly includes a mounting plate, two T-shaped slots symmetrically arranged on the side of the mounting plate close to the concrete beam and column, and a T-shaped slider slidably connected in the T-shaped slots. The loading plate is fixedly installed on the side close to the two T-shaped slots and the side of the mounting plate close to the concrete beam and column.

[0008] The loading components on the left and right sides are controlled by adjusting the adjustment components to single-point, double-point and multi-point push-pull states in turn, and the concrete beams and columns are pushed and pulled back and forth alternately to simulate the complex stress conditions of the concrete beams and columns in an earthquake.

[0009] Furthermore, the adjustment component includes a mounting groove opened on the side of the mounting plate close to the concrete beam column and a mounting sleeve fixedly installed in the mounting groove, a bidirectional hydraulic cylinder is fixedly installed in the mounting sleeve, and both ends of the bidirectional hydraulic cylinder are respectively fixedly connected to two T-shaped sliders.

[0010] Furthermore, the lifting and positioning unit includes a lifting plate fixedly installed on an output end of the hydraulic cylinder and slidably connected to the outside of four guide columns. Four rectangularly distributed guide sleeves are fixedly installed on the bottom of the lifting plate. The four guide sleeves are respectively slidably connected to the outside of the four guide columns. A fixed plate is commonly installed between the two guide sleeves on the same side of the loading assembly and the adjusting assembly.

[0011] Furthermore, the synchronous drive unit also includes a hydraulic cylinder 2 fixedly mounted on the left side of the left fixed plate, and the output end of the hydraulic cylinder 2 slides through the left fixed plate and is fixedly connected to the left mounting plate.

[0012] Furthermore, the synchronization component includes four movable plates fixedly mounted on the front and rear sides of the mounting plate and distributed in a rectangular shape, the movable plates on the left and right sides correspond to each other, and a movable rod is installed between the two corresponding movable plates.

[0013] Furthermore, two limit rods that slide through the fixing plate and are symmetrical up and down are fixedly installed on one side of the mounting plate close to the fixing plate, and the right ends of the two limit rods on the right side are fixedly installed with limit circular plates.

[0014] Furthermore, the base is composed of a base frame and a support platform fixedly installed on the top of the base frame, and the face changing assembly includes an installation box fixedly installed on the bottom of the support platform and located on the inner side of the base frame, and a rotating column rotatably installed on the inner wall of the bottom of the installation box, and a rotating disk is fixedly installed on the top of the rotating column.

[0015] Furthermore, a circular through groove is provided on the top of the support platform, and the rotating disk is slidably connected in the circular through groove.

[0016] Furthermore, a pressing plate is rotatably mounted on the bottom of the lifting plate through a mounting seat. During the test, the concrete beams and columns are fixed on the top of the rotating disk, and the lifting plate moves downward to drive the pressing plate to press the concrete beams and columns tightly on the top of the rotating disk.

[0017] Furthermore, the control component includes a drive motor fixedly mounted on the rear side of the installation box, the front end of the output shaft of the drive motor slides through the inner wall of the rear side of the installation box and is fixedly mounted with a worm, and the outer fixed sleeve of the rotating column is provided with a worm wheel meshing with the worm.

[0018] The beneficial effects of the present invention are: 1. By setting a multi-point loading unit, single-point, double-point and multi-point push-pull tests are carried out on concrete beams and columns in turn and the strain, displacement and crack data under different push-pull modes are compared, so that the influence of different push-pull modes on concrete beams and columns can be evaluated. The single-point, double-point and multi-point push-pull tests complement each other and together constitute a multi-level testing method for comprehensively evaluating the seismic performance of concrete beams and columns. Through this hierarchical progressive testing method, the seismic performance of concrete beams and columns can be understood and optimized more comprehensively and accurately.

[0019] 2. This application conducts targeted simulation design based on the two characteristics of earthquake shear waves in the process of propagation: directionality and intermittency. During the process of adjusting the push-pull surface of the concrete beam and column, the loading component is briefly stopped to simulate the intermittent period of the earthquake wave in the process of propagation. After the adjustment, push-pull tests are performed on the other two sides of the concrete beam and column to simulate the directional changes that may occur after the intermittent period of the earthquake wave, thereby more realistically simulating the earthquake changes.

[0020] 3. The concrete beams and columns are pushed and pulled alternately by the left and right loading components. The continuous push-pull mode is closer to the continuous vibration in an actual earthquake and can better simulate the continuity and dynamic characteristics of seismic waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the lifting plate, the guide sleeve, the fixing plate, the second hydraulic cylinder and the limiting rod of the present invention.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the pressing plate, the fixing plate, the guide sleeve and the lifting plate of the present invention.

[0024] Figure 4 It is a partial three-dimensional structural schematic diagram of the hydraulic cylinder 2, the synchronization component, the T-shaped slide groove, the T-shaped slide block and the loading plate of the present invention.

[0025] Figure 5 It is a sectional view of the three-dimensional structure of the fixing plate, the limiting rod, the T-shaped sliding block, the mounting plate, the loading plate and the mounting sleeve of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the installation box, rotating column, rotating disk, driving motor and worm gear part of the present invention.

[0027] Figure 7 It is a schematic diagram of four adjustment loading states of the loading component of the present invention.

[0028] In the figure: 1, base; 2, side frame; 3, guide column; 4, top plate; 5, hydraulic cylinder 1; 6, lifting and positioning unit; 601, lifting plate; 602, guide sleeve; 603, fixed plate; 7, multi-point loading unit; 8, synchronous drive unit; 9, rotating surface changing unit; 10, concrete beam column; 701, loading component; 702, adjustment component; 7011, mounting plate; 7012, T-shaped slide; 7013, T-shaped slide block; 7014, loading Plate; 7021, mounting groove; 7022, mounting sleeve; 7023, bidirectional hydraulic cylinder; 801, hydraulic cylinder 2; 802, synchronization component; 8021, moving plate; 8022, moving rod; 8023, limiting rod; 901, face-changing component; 902, control component; 9011, mounting box; 9012, rotating column; 9013, rotating disk; 9014, pressure plate; 9021, driving motor; 9022, worm; 9023, worm wheel. DETAILED DESCRIPTION

[0029] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0030] See also Figure 1 , Figure 4 and Figure 5 In this embodiment, a building component seismic resistance testing device is proposed, including a base 1 and two side frames 2 fixedly installed on the top of the base 1 and symmetrical in front and back, a top plate 4 is commonly installed on the top of the two side frames 2, four rectangularly distributed guide columns 3 are commonly installed between the top plate 4 and the base 1, a hydraulic cylinder 5 is fixedly installed on the top of the top plate 4, the output end of the hydraulic cylinder 5 slides through the top plate 4 and is provided with a lifting and positioning unit 6, a multi-point loading unit 7, a synchronous drive unit 8 and a rotating face-changing unit 9 for carrying and rotating a concrete beam column 10 are arranged between the lifting and positioning unit 6 and the base 1, the multi-point loading unit 7 includes a loading component 701 and an adjusting component 702 for adjusting the working state of the loading component 701, the loading component 701 and the adjusting component 702 are both provided with two left-right symmetrical ones and distributed on both sides of the concrete beam column 10, the synchronous drive unit 8 includes a synchronous component 802 for connecting the left and right loading components 701; the rotating face-changing unit 9 includes a face-changing component 901 arranged on the base 1 and a control component 902 for controlling the face-changing component 901.

[0031] See also Figure 1 and Figure 6 The base 1 is composed of a base frame and a support platform fixedly installed on the top of the base frame. The face-changing component 901 includes an installation box 9011 fixedly installed at the bottom of the support platform and located on the inner side of the base frame, and a rotating column 9012 rotatably installed on the inner wall of the bottom of the installation box 9011. A rotating disk 9013 is fixedly installed on the top of the rotating column 9012.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 A circular through groove is provided on the top of the support platform, and the rotating disk 9013 is slidably connected in the circular through groove. The lifting and positioning unit 6 includes a lifting plate 601 fixedly installed on the output end of the hydraulic cylinder 5 and slidably connected to the outer sides of the four guide columns 3.

[0033] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 The bottom of the lifting plate 601 is rotatably mounted with a pressing plate 9014 through a mounting seat. During the test, the concrete beam column 10 is fixed on the top of the rotating disk 9013, and the lifting plate 601 moves downward to drive the pressing plate 9014 to press the concrete beam column 10 on the top of the rotating disk 9013.

[0034] See also Figure 2 , Figure 3 and Figure 6The control component 902 includes a drive motor 9021 fixedly installed on the rear side of the installation box 9011. The front end of the output shaft of the drive motor 9021 slides through the inner wall of the rear side of the installation box 9011 and is fixedly installed with a worm 9022. The outer fixed sleeve of the rotating column 9012 is provided with a worm wheel 9023 meshing with the worm 9022.

[0035] In specific use, before starting the test, displacement sensors are installed at both ends of the concrete beam and column 10 (the displacement sensors monitor the displacement changes of the concrete beam and column 10 in real time and record the displacement data of each loading cycle), strain gauges are affixed to potential crack areas and steel bar dense areas on the surface of the concrete beam and column 10 (the strain gauges monitor the strain changes of the concrete beam and column 10 in real time and record the strain data of each loading cycle), and crack meters are installed on the surface of the concrete beam and column 10 (the crack meters monitor the generation and development of cracks on the surface of the concrete beam and column 10 and record the location, length and width of the cracks).

[0036] First, the concrete beam column 10 to be tested is placed and fixed on the top of the rotating disk 9013 by bolts, and the initial length, width, height and other geometric dimensions of the prefabricated parts and whether there are cracks on the surface are recorded. Then, the hydraulic cylinder 15 is started. The output end of the hydraulic cylinder 15 pushes the lifting and positioning unit 6 to move downward and press on the top of the concrete beam column 10. The contact point between the lifting and positioning unit 6 and the concrete beam column 10 can be rotated, so as to facilitate the adjustment of the side orientation of the concrete beam column 10. The lifting and positioning unit 6 moves downward and presses on the top of the concrete beam column 10 to simulate the effect of the load-bearing effect of the top of the beam column in the actual project, and at the same time drives the two loading components 701 and the adjustment component 702 to move to the left and right sides of the concrete beam column 10. Then, the driving motor 9021 is started. The output shaft of the driving motor 9021 rotates to drive the worm 9022 to drive the worm wheel 9023 to drive the rotating column 9012 to rotate, thereby driving the rotating disk 9013 to rotate, and then driving the concrete beam column 10 to rotate, and aligning the two opposite sides of the concrete beam column 10 with the loading components 701 on the left and right sides respectively.

[0037] Next, the left and right loading components 701 are controlled to push and pull the two sides of the concrete beam column 10 alternately in a single-point push-pull state, forming a push-pull effect, simulating the repeated push-pull action of the concrete beam column 10 during an earthquake, so as to apply a certain period of push-pull load to the two sides being pushed and pulled (the loading cycle can be set to 1 second to 10 seconds according to the type of prefabricated parts, and the loading cycle is set to 10 seconds in this test). During the loading cycle, loading starts at 0 seconds, and the concrete beam column 10 is in the initial state. From 0 to 5 seconds, the concrete beam column 10 gradually increases from zero displacement to the maximum displacement (the displacement change of the concrete beam column 10 is controlled by the loading component 701). 01 displacement is achieved), the maximum displacement is reached at 5 seconds, and the maximum displacement is gradually reduced from the maximum displacement to zero displacement at 5-10 seconds. After applying a certain period of push-pull load to the two sides being pushed and pulled, the force value, displacement value, strain value and the specific position, length and width of the crack of the concrete beam column 10 in this loading cycle are recorded (the above test data are recorded after each cycle of push-pull load is applied), and then the driving motor 9021 drives the rotating disk 9013 to rotate 90° again to adjust the push-pull surface. During the adjustment process, the loading component 701 briefly stops pushing and pulling the concrete beam column 10, and applies a cycle again after the adjustment is completed. The push-pull load is applied to simulate the directionality and intermittency of seismic shear waves during propagation. During the adjustment process, the loading component 701 stops pushing and pulling for a short time to simulate the intermittent period of seismic waves during propagation. After the adjustment, the other two sides of the concrete beam column 10 are pushed and pulled to simulate the direction change that may occur after the intermittent period of seismic waves (such as encountering a new geological interface during the propagation of seismic waves, resulting in reflection, refraction and scattering of seismic waves). This realizes the pushing and pulling of the concrete beam column 10 in multiple directions, front, back, left and right, and simulates the seismic changes more realistically. After applying a cycle of push-pull loads again, the load is applied again. The test data is recorded, and then the displacement, strain and crack development curves of the concrete beam-column 10 are plotted respectively, and the stiffness, material properties and crack development trends are analyzed to evaluate the seismic performance of the concrete beam-column 10 under the single-point push-pull test. Next, double-point and multi-point push-pull tests are carried out on the concrete beam-column 10 in turn and the seismic performance of the concrete beam-column 10 under the double-point and multi-point push-pull tests is evaluated respectively. Finally, the results of the single-point, double-point and multi-point push-pull tests are compared, and the seismic performance of the concrete beam-column 10 under different loading modes is evaluated, so as to comprehensively analyze the deficiencies in the seismic performance of the concrete beam-column 10 and optimize the structural design of the concrete beam-column 10.

[0038] See also Figure 1 , Figure 2 and Figure 3The lifting and positioning unit 6 also includes four guide sleeves 602 fixedly installed at the bottom of the lifting plate 601 and distributed in a rectangular shape. The four guide sleeves 602 are respectively slidably connected to the outside of the four guide columns 3, and a fixed plate 603 is installed between the two guide sleeves 602 on the same side of the loading component 701 and the adjusting component 702.

[0039] See also Figure 2 , Figure 4 and Figure 5 The synchronous drive unit 8 also includes a hydraulic cylinder 801 fixedly installed on the left side of the left fixed plate 603. The displacement of the loading assembly 701 can be controlled by controlling the extension and contraction amount of the output end of the hydraulic cylinder 801. The output end of the hydraulic cylinder 801 slides through the left fixed plate 603 and is connected to the loading assembly 701 on the left.

[0040] During specific use, the concrete beam column 10 is placed and fixed on the top of the rotating disk 9013 by bolts, and then the hydraulic cylinder 5 is started. The output end of the hydraulic cylinder 5 pushes the lifting plate 601 to move downward, thereby driving the pressing plate 9014 to move downward and press on the top of the concrete beam column 10. At the same time, it also drives the two loading components 701 and the adjustment component 702 to move to the left and right sides of the concrete beam column 10 to prepare for testing.

[0041] After the test is completed, the output end of the control hydraulic cylinder 5 contracts, driving the lifting plate 601 to move upward, thereby driving the pressing plate 9014 to move upward and away from the top of the concrete beam column 10, thereby releasing the clamping and fixing of the concrete beam column 10, and at the same time driving the two loading components 701 and the adjusting component 702 to move upward and away from the left and right sides of the concrete beam column 10, so as to facilitate the removal of the concrete beam column 10 after the test.

[0042] See also Figure 2 , Figure 4 , Figure 5 and Figure 7 The loading assembly 701 includes a mounting plate 7011, two T-shaped slots 7012 which are opened on the side of the mounting plate 7011 close to the concrete beam column 10 and are symmetrical up and down, and a T-shaped slider 7013 which is slidably connected in the T-shaped slots 7012. A loading plate 7014 is fixedly installed on the side close to the two T-shaped slots 7012 and the side of the mounting plate 7011 close to the concrete beam column 10. The mounting plate 7011 on the left is fixedly installed on the output end of the hydraulic cylinder 801.

[0043] See also Figure 2 , Figure 4 , Figure 5 and Figure 7The adjustment component 702 includes a mounting groove 7021 opened on the side of the mounting plate 7011 close to the concrete beam column 10 and a mounting sleeve 7022 fixedly installed in the mounting groove 7021. A bidirectional hydraulic cylinder 7023 is fixedly installed in the mounting sleeve 7022, and both ends of the bidirectional hydraulic cylinder 7023 are fixedly connected to two T-shaped sliders 7013 respectively.

[0044] See also Figure 2 , Figure 4 , Figure 5 and Figure 7 The synchronization component 802 includes four movable plates 8021 fixedly mounted on the front and rear sides of the mounting plate 7011 and distributed in a rectangular shape. The movable plates 8021 on the left and right sides correspond to each other one by one, and a movable rod 8022 is installed between the two corresponding movable plates 8021.

[0045] See also Figure 2 , Figure 4 , Figure 5 and Figure 7 The mounting plate 7011 is fixedly installed with two limit rods 8023 that slide through the fixing plate 603 and are symmetrical up and down on one side close to the fixing plate 603. The right ends of the two limit rods 8023 on the right are fixedly installed with limit circular plates. The two limit rods 8023 on the right not only limit the mounting plate 7011 on the right side, but also support the mounting plate 7011 on the right side.

[0046] When in use, in the initial state, the three loading plates 7014 are close to each other and in a single-point push-pull state (such as Figure 7 As shown in the middle left figure, after the two loading assemblies 701 move down to both sides of the concrete beam column 10 and fix and adjust the concrete beam column 10, the hydraulic cylinder 2 801 is started, and the output end of the hydraulic cylinder 2 801 continuously expands and contracts to drive the mounting plate 7011 on the left to move back and forth, thereby driving the two loading plates 7014 to apply load to the side of the concrete beam column 10. At the same time, during the reciprocating movement of the mounting plate 7011 on the left, the mounting plate 7011 on the right will be synchronously driven to move back and forth left and right through the moving plate 8021 and the moving rod 8022. When the loading plate 7014 on the left applies load to the concrete beam column 10, the loading plate 7014 on the right moves to the right away from the concrete beam column 10. Conversely, when the loading plate 7014 on the left moves away from the concrete beam column 10, the loading plate 7014 on the right applies load to the concrete beam column 10, thereby realizing the function of pushing and pulling the concrete beam column 10. The continuous push-pull mode is closer to the continuous vibration in the actual earthquake, and can better simulate the continuity and dynamic characteristics of the seismic wave.

[0047] After the single-point push-pull test is completed and the test data is recorded, the fixation of the concrete beam column 10 is released, and the two loading components 701 and the adjustment component 702 are driven to move upward and away from the left and right sides of the concrete beam column 10. The concrete beam column 10 after the single-point push-pull test is taken out, and then a new concrete beam column 10 is replaced and adjusted and fixed. At the same time, the two loading components 701 and the adjustment component 702 are moved to the left and right sides of the concrete beam column 10 again, and then one end of the bidirectional hydraulic cylinder 7023 is started to push the corresponding T-shaped slider. 7013 slides along the T-shaped slide groove 7012, thereby driving the corresponding loading plate 7014 to move to the side away from the middle side loading plate 7014, and then converting to a double-point push-pull state. After the conversion is completed, the above-mentioned push-pull test operation is repeated to perform a double-point push-pull test. After the double-point push-pull test is completed, the experimental data is recorded again and a new concrete beam column 10 is replaced, and then the upper and lower loading plates 7014 are driven away from the middle loading plate 7014 to convert to a multi-point push-pull state, and then the above-mentioned push-pull test operation is repeated to perform a multi-point push-pull test.

[0048] After respectively analyzing the seismic performance of the concrete beam-column 10 under single-point, double-point and multi-point push-pull tests, the results of the single-point, double-point and multi-point push-pull tests are compared, and the seismic performance of the concrete beam-column 10 under different loading modes is evaluated, so as to comprehensively analyze the deficiencies in the seismic performance of the concrete beam-column 10 and optimize the structural design of the concrete beam-column 10. By comparing the strain and displacement data under different push-pull modes, the influence of different push-pull modes on the concrete beam-column 10 can be evaluated. The single-point, double-point and multi-point push-pull tests complement each other and together constitute a multi-level testing method for comprehensively evaluating the seismic performance of the concrete beam-column 10. Through this hierarchical progressive testing method, the seismic performance of the concrete beam-column 10 can be understood and optimized more comprehensively and accurately.

[0049] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A building component seismic resistance testing device, characterized in that: include: A base (1) and two side frames (2) fixedly mounted on the top of the base (1) and symmetrically arranged front and back, a top plate (4) being mounted on the top of the two side frames (2), four rectangularly distributed guide columns (3) being mounted between the top plate (4) and the base (1), a hydraulic cylinder (5) being fixedly mounted on the top of the top plate (4), an output end of the hydraulic cylinder (5) slidingly passing through the top plate (4) and being provided with a lifting and positioning unit (6), a multi-point loading unit (7), a synchronous drive unit (8) and a rotation exchange unit for carrying and rotating a concrete beam column (10) being arranged between the lifting and positioning unit (6) and the base (1). The surface unit (9) comprises a multi-point loading unit (7) including a loading component (701) and an adjusting component (702) for adjusting the working state of the loading component (701); the loading component (701) and the adjusting component (702) are both provided with two left-right symmetric components and are distributed on both sides of the concrete beam column (10); the synchronous drive unit (8) comprises a synchronous component (802) for connecting the two left-right loading components (701); the rotating surface changing unit (9) comprises a surface changing component (901) provided on the base (1) and a control component (902) for controlling the surface changing component (901); The loading assembly (701) comprises a mounting plate (7011), two T-shaped slide grooves (7012) which are symmetrically arranged on a side of the mounting plate (7011) close to the concrete beam column (10) and a T-shaped sliding block (7013) which is slidably connected to the T-shaped slide grooves (7012), and a loading plate (7014) is fixedly installed on a side close to the two T-shaped slide grooves (7012) and a side of the mounting plate (7011) close to the concrete beam column (10); The loading components (701) on the left and right sides are controlled by the adjustment component (702) to be adjusted to single-point, double-point and multi-point push-pull states in sequence, and the concrete beam column (10) is pushed and pulled alternately and reciprocally, so as to simulate the complex stress conditions of the concrete beam column in an earthquake.

2. A building component seismic resistance testing device according to claim 1, characterized in that: The adjustment component (702) comprises a mounting groove (7021) provided on a side of the mounting plate (7011) close to the concrete beam column (10) and a mounting sleeve (7022) fixedly mounted in the mounting groove (7021); a bidirectional hydraulic cylinder (7023) is fixedly mounted in the mounting sleeve (7022); and two ends of the bidirectional hydraulic cylinder (7023) are respectively fixedly connected to two T-shaped sliders (7013).

3. A building component seismic resistance testing device according to claim 1, characterized in that: The lifting and positioning unit (6) comprises a lifting plate (601) fixedly mounted on the output end of a hydraulic cylinder (5) and slidably connected to the outside of four guide columns (3); four rectangularly distributed guide sleeves (602) are fixedly mounted on the bottom of the lifting plate (601); the four guide sleeves (602) are respectively slidably connected to the outside of the four guide columns (3); and a fixing plate (603) is installed between two guide sleeves (602) on the same side of the loading component (701) and the adjusting component (702).

4. A building component seismic resistance testing device according to claim 3, characterized in that: The synchronous drive unit (8) further comprises a second hydraulic cylinder (801) fixedly mounted on the left side of the left fixed plate (603); the output end of the second hydraulic cylinder (801) slides through the left fixed plate (603) and is fixedly connected to the left mounting plate (7011).

5. A building component seismic resistance testing device according to claim 1, characterized in that: The synchronization component (802) comprises four movable plates (8021) fixedly mounted on the front and rear sides of the mounting plate (7011) and arranged in a rectangular shape, the movable plates (8021) on the left and right sides correspond to each other one by one, and a movable rod (8022) is installed between two corresponding movable plates (8021).

6. A building component seismic resistance testing device according to claim 3, characterized in that: Two limit rods (8023) are fixedly mounted on one side of the mounting plate (7011) close to the fixed plate (603), and are slidably penetrate the fixed plate (603) and are symmetrical up and down. The right ends of the two limit rods (8023) on the right side are both fixedly mounted with limit circular plates.

7. A building component seismic resistance testing device according to claim 3, characterized in that: The base (1) is composed of a base frame and a support platform fixedly mounted on the top of the base frame, and the face-changing assembly (901) comprises a mounting box (9011) fixedly mounted on the bottom of the support platform and located on the inner side of the base frame, and a rotating column (9012) rotatably mounted on the inner wall of the bottom of the mounting box (9011), and a rotating disk (9013) is fixedly mounted on the top of the rotating column (9012).

8. A building component seismic resistance testing device according to claim 7, characterized in that: A circular through groove is provided on the top of the support platform, and the rotating disk (9013) is slidably connected in the circular through groove.

9. A building component seismic resistance testing device according to claim 8, characterized in that: A pressing plate (9014) is rotatably mounted on the bottom of the lifting plate (601) via a mounting seat. During the test, the concrete beam column (10) is fixed on the top of the rotating disk (9013), and the lifting plate (601) moves downward to drive the pressing plate (9014) to press the concrete beam column (10) against the top of the rotating disk (9013).

10. A building component seismic resistance testing device according to claim 7, characterized in that: The control assembly (902) comprises a drive motor (9021) fixedly mounted on the rear side of the installation box (9011); the front end of the output shaft of the drive motor (9021) slides through the inner wall of the rear side of the installation box (9011) and is fixedly mounted with a worm (9022); and the outer fixed sleeve of the rotating column (9012) is provided with a worm wheel (9023) meshing with the worm (9022).

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