Anti-seismic experiment device across viscoelastic boundary of seismic fracture zone and application method of anti-seismic experiment device

Abstract

The invention discloses an anti-seismic experiment device crossing a viscoelastic boundary of an earthquake fracture zone and an application method of the anti-seismic experiment device. The model box frames are connected to the upper portion of the bottom plate, the supporting units are arranged between the two model box frames and arranged in the model box frames, and the vertical connecting pieces and the bottom connecting pieces are arranged on the supporting units between the two model box frames. Through the arrangement of the supporting units, the supporting unit bodies can elastically move up and down, left and right, front and back, rotate and the like, and elastic deformation and energy consumption are carried out through the springs, so that a constraint mode of a viscoelastic boundary is simulated; the supporting units are arranged in the model box frames and are in butt joint with the two model box frames, two applications of one component are achieved, and through the arrangement of the bottom connecting pieces and the vertical connecting pieces, convenient construction is facilitated, and the connecting integrity is guaranteed; and through the arrangement of the rolling support assembly, the stress of the building or the structure during earthquake resistance can be simulated more accurately.

Description

Technical Field

[0001] This invention relates to the field of seismic testing technology, and in particular to a seismic testing device and its application method for seismic resistance across viscoelastic boundaries of seismic fracture zones. Background Technology

[0002] To ensure good seismic performance of buildings or structures after construction, seismic design is required from the initial design stage. To guarantee the effectiveness and feasibility of the design, it is usually verified through seismic testing. However, in general seismic tests, the model boxes are rigidly connected and fixed, with boundary constraints equivalent to rigid constraints. In actual construction and applications, tunnels, pipelines, bridges, and other buildings or structures under seismic forces require analysis using viscoelastic boundaries for accurate characterization. Existing model test boxes cannot accurately simulate these conditions, thus requiring specific design features to address these technical issues. Summary of the Invention

[0003] This invention provides a seismic test device and its application method for seismic resistance across a viscoelastic boundary of a seismic fracture zone, which solves technical problems such as the viscoelastic setting of the model box boundary, the flexible connection between two model boxes, and the design of the corresponding support components.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A seismic test device for viscoelastic boundaries across seismic fracture zones includes two parallel shaking tables, a base plate on each shaking table, a model box frame connected above the base plate, a rolling support assembly connected between the two base plates, a support unit disposed between the two model box frames and inside the model box frames, and vertical and bottom connecting members disposed on the support unit between the two model box frames. The support units are set at both ends between the two model boxes and are continuously set horizontally and spaced vertically. The vertical connector and the bottom connector together form a U-shaped frame, wherein the vertical connector connects to the vertical support unit and the bottom connector connects to the support units at the front and rear ends; the U-shaped frame is set one by one to correspond to the horizontal support unit. The model box frame is layered, with support units between each layer, and the support units are located at least at the corners and the middle of each side of the model box frame. The support unit includes a first support assembly, a second support assembly perpendicularly disposed to the first support assembly, a support column assembly connected between the first support assembly and the second support assembly, a first side plate connected to both sides of the first support assembly, a second side plate connected to both sides of the second support assembly, a first sliding connector connected between the support column assembly and the first support assembly, a second sliding connecting member connected between the support column assembly and the second support assembly, a first spring member connected between the first sliding connecting member and the first side plate, and a second spring member connected between the second sliding connecting member and the second side plate. The first sliding connector is slidably connected to the first support assembly; the second sliding connector is slidably connected to the second support assembly and is rotatably connected to the support column assembly; wherein the support column assembly is a height-adjustable assembly.

[0005] Furthermore, the model box frame is a square box frame or a rectangular box frame, and each layer of the frame is assembled by H-shaped parts; support units are connected between the upper and lower H-shaped parts, and the first support component and the second support component in the support unit are arranged vertically.

[0006] Furthermore, the rolling support assembly is provided one by one with the bottom connector. The rolling support assembly includes a support base plate, a first rolling support disposed above the support base plate, and a second rolling support disposed below both ends of the support base plate and connected to the bottom plate. The top of the first rolling support is rotatably connected to the bottom connector, and the first rolling support is spaced apart along the length of the bottom connector; a support foundation is also provided between the second rolling support and the bottom plate.

[0007] Furthermore, both the bottom connector and the vertical connector are right-angle steel pieces, rectangular tubes, or channel steel pieces, and both the bottom connector and the vertical connector are detachably connected to the support unit by bolts.

[0008] Furthermore, the first support assembly includes a first support plate, a first support slide rail disposed in the middle of the first support plate, and a first support slider slidably connected to the first support slide rail. The first support slider is detachably connected to the first sliding member.

[0009] Furthermore, the first sliding member includes a first sliding plate and first sliding side plates disposed at both ends of the first sliding plate. The first sliding side plates are detachably connected to the first spring member. The first sliding plate is detachably attached to the bottom of the support column assembly and is detachably connected to the first support slider.

[0010] Furthermore, the second support assembly includes a second support plate, a second support slide rail disposed in the middle of the second support plate, and a second support slider slidably connected to the second support slide rail; the second support slider is detachably connected to the second sliding connector.

[0011] Furthermore, the second sliding connector is an inverted U-shaped component, the opening of which is rotatably connected to the end of the support column assembly, and the side wall is provided with a notch that is detachably connected to the second spring component.

[0012] Furthermore, the support column assembly includes an upper column rod, a lower column rod telescopically sleeved within the upper column rod, a core column rod disposed inside the upper column rod and the lower column rod, and an internal spring disposed between the core column rod and the upper column rod; wherein the core column rod is a telescopic rod.

[0013] Furthermore, the application method of the seismic resistance experimental device across the viscoelastic boundary of the seismic fracture zone is as follows: Step 1: Based on the determined dimensions of the model box frame, mass-produce the model box frame components in the factory, and simultaneously process the vertical connecting parts and the bottom connecting parts; Step 2: Assemble the support unit, wherein the height of the support column assembly is not less than the height of each layer of the model box frame; and it is adapted to the number of equal divisions of the distance between the model box frames between two vibration tables; Step 3: Connect the support units on the two vertical connectors and the support unit on the bottom connector of each vertical section to form a U-shaped connector module with support units; where a support unit is shared at the corner where the vertical connector and the bottom connector are connected; the support unit is connected to the bottom connector and the vertical connector through the first side plate on the support unit; or it is connected to the bottom connector and the vertical connector through the second side plate on the support unit; the support units are densely arranged at the bottom and top of the model box frame; Step 4: Install base plates on both vibration tables, install rolling support assemblies between the two base plates, and install model box frames on each base plate; after each layer of model box frames is installed, install corresponding support units; wherein, the first support assembly of the support unit is connected to the web of the lower H-shaped part, and the second support assembly is connected to the web of the upper H-shaped part; in this way, the support units set on the model box frames simulate viscoelastic boundaries, wherein the support units can move elastically up and down, left and right, and front and back, and achieve rotational connection in the horizontal direction; Step 5: After the model box frame is installed and the overall stability is verified, install the connecting modules; install them one by one according to the position of the first rolling support on the rolling support assembly, and connect the horizontally adjacent support units with bolts; at this time, the support column assembly of the support unit is set horizontally, and the first support assembly and the second support assembly of the adjacent support unit are bolted together; the support units at both ends of the horizontal direction are detachably connected to the model box frame; thus, the connecting modules can move elastically in the horizontal direction, forward, backward, left, right and rotation; then, a flexible sealing layer is laid in the box of the model box frame to form a sealed space with an upper opening, thereby completing the overall connection of the seismic experimental device across the viscoelastic boundary of the seismic fracture zone.

[0014] The beneficial effects of this invention are reflected in: 1) By setting up a support unit, the support unit body can perform elastic movements such as up and down, left and right, forward and backward, and rotation. The spring performs elastic deformation and dissipates energy, thereby simulating the constraint mode of a viscoelastic boundary. 2) This invention achieves two applications for one component by setting the support unit separately inside the model box frame and connecting the two model box frames. Furthermore, the bottom connection and vertical connector facilitate construction and ensure the integrity of the connection. 3) By setting up the rolling support assembly, the present invention further ensures the mobility of the docking point and accurately depicts the stress situation at the cross-layer and fracture points, which is conducive to more accurate simulation of the stress on buildings or structures during earthquakes.

[0015] This invention effectively solves the technical problems of viscoelastic setting of the model box boundary, flexible connection between two model boxes, and design of corresponding support components. Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention; the main objectives and other advantages of this invention can be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description

[0016] Figure 1 This is a front view of the installation of the seismic resistance experimental device across the viscoelastic boundary of a seismic fracture zone. Figure 2 This is a schematic diagram of the rolling support assembly and its connection structure; Figure 3 This is a top view of the rolling support assembly and its connection structure; Figure 4 This is a top-view schematic diagram of the installation of a seismic resistance experimental device across a viscoelastic boundary of a seismic fracture zone; Figure 5 This is a schematic diagram of the connection structure of the support unit inside the model box frame; Figure 6 This is a three-dimensional schematic diagram of the support unit; Figure 7 This is a front view of the support unit; Figure 8 This is a vertical section view of the support unit.

[0017] Reference numerals: 1-Vibration table, 2-Model box frame, 3-Rolling support assembly, 31-Support base plate, 32-First rolling support, 33-Second rolling support, 34-Support foundation, 4-Vertical connector, 5-Support unit, 51-First support assembly, 511-First support plate, 512-First support slide rail, 513-First support slider, 52-Second support assembly, 521-Second support plate, 522-Second support 523-Second support slider, 53-Support column assembly, 531-Column upper rod, 532-Column lower rod, 533-Column core rod, 534-Column inner spring, 54-First side plate, 55-Second side plate, 56-First sliding connector, 561-First sliding connecting plate, 562-First sliding connecting side plate, 57-First spring component, 58-Second sliding connecting component, 59-Second spring component, 6-Base plate, 7-Cavity, 8-Bottom connector. Detailed Implementation

[0018] like Figures 1 to 8 As shown, a seismic test device for viscoelastic boundaries across seismic fracture zones includes two parallel shaking tables 1, a base plate 6 on each shaking table 1, a model box frame 2 connected above the base plate 6, a rolling support assembly 3 connected between the two base plates 6, a support unit 5 disposed between the two model box frames 2 and inside the model box frame 2, and a vertical connector 4 and a bottom connector 8 disposed on the support unit 5 between the two model box frames 2.

[0019] In this embodiment, the support unit 5 is set at both ends between the two model box frames 2 and is continuously set in the horizontal direction and spaced apart in the vertical direction; wherein, the base plate 6 is made of 10mm thick steel plate, and its width and length are both greater than the width and length of the model box frame 2; the base plate 6 and the model box frame 2 are fixedly connected by bolts and waterproof sealant is also provided at the connection seam.

[0020] In this embodiment, the model box frame 2 is arranged in layers, with a support unit 5 between each layer, and the support unit 5 is at least located at the corners and the middle of each side of the model box frame 2; the model box frame 2 is a square box frame or a rectangular box frame, and each layer of the frame is assembled by H-shaped parts; the support unit 5 is connected between the upper and lower H-shaped parts, and the first support component 51 and the second support component 52 in the support unit 5 are arranged vertically.

[0021] In this embodiment, the rolling support assembly 3 is provided one-to-one with the bottom connector 8. The rolling support assembly 3 includes a support base plate 31, a first rolling support 32 disposed above the support base plate 31, and a second rolling support 33 disposed below both ends of the support base plate 31 and connected to the base plate 6. The top of the first rolling support 32 is rolledly connected to the bottom connector 8, and the first rolling supports 32 are spaced apart along the longitudinal direction of the bottom connector 8. The support base plate 31 is made of 8mm thick steel plate. A support foundation 34 is also provided between the second rolling support 33 and the base plate 6. The support foundation 34 is supported by steel blocks or concrete blocks, and the support foundation 34 is fixedly connected to the base plate 6 by embedded parts.

[0022] In this embodiment, the vertical connector 4 and the bottom connector 8 together form a U-shaped frame, wherein the vertical connector 4 is connected to the vertical support unit 5, and the bottom connector 8 is connected to the support units 5 at the front and rear ends; the U-shaped frame is set one by one to the horizontal support units 5; the bottom connector 8 and the vertical connector 4 are both right-angle steel parts, rectangular tube parts or channel steel parts, and the bottom connector 8 and the vertical connector 4 are detachably connected to the support unit 5 by bolts.

[0023] In this embodiment, the support unit 5 includes a first support assembly 51, a second support assembly 52 disposed perpendicularly to the first support assembly 51, a support column assembly 53 connected between the first support assembly 51 and the second support assembly 52, a first side plate 54 connected to both sides of the first support assembly 51, a second side plate 55 connected to both sides of the second support assembly 52, a first sliding connector 56 connected between the support column assembly 53 and the first support assembly 51, a second sliding connecting member 58 connected between the support column assembly 53 and the second support assembly 52, a first spring member 57 connected between the first sliding connecting member 56 and the first side plate 54, and a second spring member 59 connected between the second sliding connecting member 58 and the second side plate 55.

[0024] The first sliding connector 56 is slidably connected to the first support assembly 51; the second sliding connector 58 is slidably connected to the second support assembly 52 and the second sliding connector 58 is rotatably connected to the support column assembly 53; wherein, the support column assembly 53 is a height-adjustable assembly.

[0025] In this embodiment, the first support assembly 51 includes a first support plate 511, a first support slide rail 512 disposed in the middle of the first support plate 511, and a first support slider 513 slidably connected to the first support slide rail 512; the first support slider 513 is detachably connected to the first sliding member 56. The first sliding member 56 includes a first sliding connecting plate 561 and first sliding connecting side plates 562 disposed at both ends of the first sliding connecting plate 561, the first sliding side plates 562 being detachably connected to the first spring member 57; the first sliding connecting plate 561 is detachably attached to the bottom of the support column assembly 53 and detachably connected to the first support slider 513.

[0026] In this embodiment, the second support assembly 52 includes a second support plate 521, a second support slide rail 522 disposed in the middle of the second support plate 521, and a second support slider 523 slidably connected to the second support slide rail 522; the second support slider 523 is detachably connected to the second sliding connecting member 58. The second sliding connecting member 58 is an inverted U-shaped member, the opening of which is rotatably connected to the end of the support column assembly 53, and the side wall is provided with a notch that is detachably connected to the second spring member 59.

[0027] In this embodiment, the support column assembly 53 includes an upper column rod 531, a lower column rod 532 telescopically sleeved within the upper column rod 531, a core column rod 533 disposed inside the upper column rod 531 and the lower column rod 532, and an internal spring 534 disposed between the core column rod 533 and the upper column rod 531; wherein the core column rod 533 is a telescopic rod.

[0028] Combination Figures 1 to 8 The application method of the seismic resistance experimental device across the viscoelastic boundary of the seismic fracture zone is further explained. The specific steps are as follows: Step 1: Based on the determined dimensions of the model box frame 2, process the model box frame 2 components in batches at the factory, and simultaneously process the vertical connecting piece 4 and the bottom connecting piece 8.

[0029] Step 2: Assemble the support unit 5, wherein the height of the support column assembly 53 is not less than the height of each layer of model box frame 2; and it is adapted to the number of equal divisions of the distance between the model box frames 2 between the two vibration tables 1.

[0030] Step 3: Connect the support units 5 on the two vertical connectors 4 and the support units 5 on the bottom connector 8 of each vertical section to form a U-shaped connector module containing support units 5; wherein a support unit 5 is shared at the corner where the vertical connectors 4 and the bottom connector 8 are connected; the support unit 5 is connected to the bottom connector 8 and the vertical connector 4 through the first side plate 54 on the support unit 5; or it is connected to the bottom connector 8 and the vertical connector 4 through the second side plate 55 on the support unit 5; the support units 5 are densely arranged at the bottom and top of the model box frame 2.

[0031] Step 4: Install base plates 6 on both vibration tables 1, install rolling support assemblies 3 between the two base plates 6, and install model box frames 2 on each base plate 6; after each layer of model box frames 2 is installed, install corresponding support units 5; wherein, the first support assembly 51 of the support unit 5 is connected to the web of the lower H-shaped part, and the second support assembly 52 is connected to the web of the upper H-shaped part; in this way, the support units 5 set on the model box frames 2 simulate viscoelastic boundaries, wherein the support units 5 can move elastically up and down, left and right, and front and back, and achieve rotational connection in the horizontal direction.

[0032] Step 5: After the model box frame 2 is installed and the overall stability is checked, install the connecting module; install them one by one according to the position of the first rolling support 32 on the rolling support assembly 3, and connect the horizontally adjacent support units 5 with bolts; at this time, the support column assembly 53 of the support unit 5 is set horizontally, and the first support assembly 51 and the second support assembly 52 of the adjacent support unit 5 are bolted together; the support units 5 at both ends in the horizontal direction are detachably connected to the model box frame 2; thus, the connecting module can move elastically in the horizontal direction, forward, backward, left, right and rotation; then, a flexible sealing layer is laid in the box chamber 7 of the model box frame 2 to form a sealed space with an upper opening, thereby completing the overall connection of the seismic experimental device across the viscoelastic boundary of the seismic fracture zone.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A seismic resistance experimental device for crossing a viscoelastic boundary of a seismic fracture zone, characterized in that, It includes two parallel vibration tables, a base plate on each vibration table, a model box frame connected above the base plate, a rolling support assembly connected between the two base plates, a support unit set between the two model box frames and inside the model box frames, and vertical and bottom connectors set on the support unit between the two model box frames. The support units are set at both ends between the two model boxes and are continuously set horizontally and spaced vertically. The vertical connector and the bottom connector together form a U-shaped frame, wherein the vertical connector is connected to the vertical support unit, and the bottom connector is connected to the support units at the front and rear ends. The U-shaped frame is set up one by one to correspond to the horizontally upward support unit; The model box frame is layered, with support units between each layer, and the support units are located at least at the corners and the middle of each side of the model box frame. The support unit includes a first support assembly, a second support assembly perpendicularly disposed to the first support assembly, a support column assembly connected between the first support assembly and the second support assembly, a first side plate connected to both sides of the first support assembly, a second side plate connected to both sides of the second support assembly, a first sliding connector connected between the support column assembly and the first support assembly, a second sliding connecting member connected between the support column assembly and the second support assembly, a first spring member connected between the first sliding connecting member and the first side plate, and a second spring member connected between the second sliding connecting member and the second side plate. The first sliding connector is slidably connected to the first support assembly; the second sliding connector is slidably connected to the second support assembly and is rotatably connected to the support column assembly; wherein the support column assembly is a height-adjustable assembly.

2. The seismic test device for cross-seismic fracture zone viscoelastic boundary as described in claim 1, characterized in that, The model box frame is a square box frame or a rectangular box frame, and each layer of the frame is assembled by H-shaped parts; support units are connected between the upper and lower H-shaped parts, and the first support component and the second support component in the support unit are arranged vertically.

3. The seismic test device for cross-seismic fracture zone viscoelastic boundary as described in claim 2, characterized in that, The rolling support assembly is provided one by one with the corresponding bottom connector. The rolling support assembly includes a support base plate, a first rolling support disposed above the support base plate, and a second rolling support disposed below both ends of the support base plate and connected to the bottom plate. The top of the first rolling support is rotatably connected to the bottom connector, and the first rolling support is spaced apart along the longitudinal direction of the bottom connector; A support foundation is also provided between the second rolling support and the base plate.

4. The seismic test device for cross-seismic fracture zone viscoelastic boundary as described in claim 3, characterized in that, Both the bottom connector and the vertical connector are right-angle steel pieces, rectangular tubes, or channel steel pieces, and both the bottom connector and the vertical connector are detachably connected to the support unit by bolts.

5. The seismic test apparatus for a viscoelastic boundary across a seismic fracture zone as described in claim 4, characterized in that, The first support assembly includes a first support plate, a first support slide rail disposed in the middle of the first support plate, and a first support slider slidably connected to the first support slide rail. The first support slider is detachably connected to the first sliding member.

6. The seismic test apparatus for a viscoelastic boundary across a seismic fracture zone as described in claim 5, characterized in that, The first sliding link includes a first sliding plate and first sliding side plates disposed at both ends of the first sliding plate. The first sliding side plates are detachably connected to the first spring. The first sliding plate is detachably attached to the bottom of the support column assembly and is detachably connected to the first support slider.

7. The seismic test apparatus for cross-seismic fracture zone viscoelastic boundary as described in claim 6, characterized in that, The second support assembly includes a second support plate, a second support slide rail disposed in the middle of the second support plate, and a second support slider slidably connected to the second support slide rail; the second support slider is detachably connected to the second sliding connector.

8. The seismic test apparatus for cross-seismic fracture zone viscoelastic boundary as described in claim 7, characterized in that, The second sliding connector is an inverted U-shaped component, the opening of which is rotatably connected to the end of the support column assembly, and the side wall is provided with a notch that is detachably connected to the second spring component.

9. The seismic test device for cross-seismic fracture zone viscoelastic boundary as described in claim 8, characterized in that, The support column assembly includes an upper column rod, a lower column rod telescopically sleeved within the upper column rod, a core column rod disposed inside the upper and lower column rods, and an internal spring disposed between the core column rod and the upper column rod; wherein the core column rod is a telescopic rod.

10. A method for applying the seismic experimental device for viscoelastic boundaries across seismic fracture zones as described in claim 9, characterized in that, The specific steps are as follows: Step 1: Based on the determined dimensions of the model box frame, mass-produce the model box frame components in the factory, and simultaneously process the vertical connecting parts and the bottom connecting parts; Step 2: Assemble the support unit, wherein the height of the support column assembly is not less than the height of each layer of the model box frame; and it is adapted to the number of equal divisions of the distance between the model box frames between two vibration tables; Step 3: Connect the support units on the two vertical connectors and the support units on the bottom connector of each vertical section to form a U-shaped connector module with support units; The vertical connector and the bottom connector share a common support unit at the corner where they connect. The support unit is connected to the bottom connector and the vertical connector via the first side plate. Alternatively, it can be connected to the bottom connector and vertical connector via the second side plate on the support unit; the support units are densely arranged at the bottom and top of the model box frame; Step 4: Install base plates on both vibration tables, install rolling support assemblies between the two base plates, and install model box frames on each base plate; after each layer of model box frames is installed, install corresponding support units; wherein, the first support assembly of the support unit is connected to the web of the lower H-shaped part, and the second support assembly is connected to the web of the upper H-shaped part; in this way, the support units set on the model box frames simulate viscoelastic boundaries, wherein the support units can move elastically up and down, left and right, and forward and backward, and can rotate in the horizontal direction; Step 5: After the model box frame is installed and the overall stability is verified, install the connecting modules; install them one by one according to the position of the first rolling support on the rolling support assembly, and connect the horizontally adjacent support units with bolts; at this time, the support column assembly of the support unit is set horizontally, and the first support assembly and the second support assembly of the adjacent support unit are bolted together; the support units at both ends of the horizontal direction are detachably connected to the model box frame; thus, the connecting modules can move elastically in the horizontal direction, forward, backward, left, right and rotation; then, a flexible sealing layer is laid in the box of the model box frame to form a sealed space with an upper opening, thereby completing the overall connection of the seismic experimental device across the viscoelastic boundary of the seismic fracture zone.

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