Horizontal sliding limit device for shear wall quasi-static test and limit structure thereof

Abstract

The utility model discloses a shearing force wall quasi static test horizontal slip limiting device and limiting structure thereof, including horizontal limiter, the horizontal limiter includes two jacks and steel roof beam, is provided with steel sheet respectively at the opposite end of two jacks, the both ends of steel roof beam are linked with two steel sheets respectively, and simultaneously on this basis, disclosed its limiting structure. The utility model discloses through the jack of horizontal limiter fixed in the channel of test bench, and makes steel roof beam to be in the base beam both ends of shearing force wall test piece, when shearing force wall carries out quasi static test, steel roof beam will horizontal force deliver to steel sheet, finally through the friction of steel sheet and channel, this horizontal force is cancelled, simultaneously, also can pass through the vertical displacement of compression beam constraint test piece, and the force of horizontal direction part through the friction of compression beam generates and shares, simple structure, convenient installation can effectively limit shearing force wall quasi static test in horizontal slip.

Description

Technical Field

[0001] This utility model relates to the field of building structure experimental equipment technology, and in particular to a horizontal slip limiting device and its limiting structure for a shear wall quasi-static test. Background Technology

[0002] The quasi-static test of shear walls is one of the most important and commonly used test methods in seismic research of structural engineering. It is mainly used to evaluate the seismic performance of shear wall structures or their components (such as single walls, walls with connecting beams, wall segments, etc.) under simulated seismic loading. "Quasi-static" means that the loading rate of the test is much lower than that of actual seismic loading, and it is quasi-static, but its loading method simulates the cyclic load that the structure bears under seismic loading.

[0003] However, current shear walls lack effective horizontal restraint devices when undergoing quasi-static tests using flat-groove test devices with ground anchors. This makes the shear walls prone to sliding under horizontal loading, leading to errors in the test data and affecting the experimental results. Utility Model Content

[0004] To address the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a horizontal slip limiting device and its limiting structure for quasi-static testing of shear walls, which solves the problem of the lack of an effective horizontal limiting device when existing shear walls are subjected to quasi-static testing with ground anchors in the form of flat grooves.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A horizontal sliding limiting device for a quasi-static test of a shear wall is characterized by comprising a horizontal limiter, wherein the horizontal limiter comprises two jacks (1) and a steel beam (2), the extension and retraction directions of the two jacks are parallel and facing each other, and a steel plate (3) is respectively provided at one end of the two jacks facing each other, and the two ends of the steel beam are respectively connected to the two steel plates, so that the displacement of the steel beam in the direction perpendicular to its length is limited.

[0006] Furthermore, the steel beam includes a rectangular beam body, with a U-shaped groove formed on the upper end face of the beam body along its length direction, and multiple stiffening plates distributed at intervals along its length direction within the U-shaped groove.

[0007] Furthermore, the steel plate is slidably connected to the steel beam and can move along the length of the steel beam.

[0008] Furthermore, it also includes a pressure beam (4) arranged parallel to the steel beam, and the pressure beam is provided with fastening bolts (5).

[0009] A horizontal slip limiting structure for a quasi-static test of a shear wall includes a test platform, a shear wall specimen, and the aforementioned horizontal slip limiting device for a quasi-static test of a shear wall. The test platform has two channels, and the shear wall specimen is located between the two channels. It includes an integrally formed wall (6) and a foundation beam (7) at the lower end of the wall. The length of the foundation beam is greater than the width of the wall. The characteristic feature is that a horizontal limiter is respectively set at both ends of the foundation beam. The two steel beams are located on the test platform and are in close contact with the beam ends of the foundation beam. Two jacks are located in the two channels respectively. Under the action of the jacks, the fixed ends of the jacks are in close contact with the side walls of the channels, so that the horizontal limiter is fixed to the test platform.

[0010] Furthermore, a pressure beam is provided on the upper side of each end of the foundation beam. The two ends of the pressure beam are located above the channel, and the fastening bolts at both ends of the pressure beam are fixedly connected to the bottom of the channel.

[0011] Furthermore, the steel plate is slidably connected to the steel beam, and under the action of the jack, the steel plate is also tightly attached to the side wall of the channel.

[0012] Compared with the prior art, this application has the following advantages: This invention uses a horizontal limiter jack to fix the steel beam in the channel of the test bench, and places the steel beam on both sides of the foundation beam of the shear wall specimen. When the shear wall is subjected to a quasi-static test, the steel beam transmits the horizontal force to the steel plate, and finally the horizontal force is offset by the friction between the steel plate and the channel. At the same time, the vertical displacement of the specimen can be constrained by the pressure beam, while part of the horizontal force is shared by the friction force generated by the pressure beam. The structure is simple, the installation is convenient, and it can effectively limit the horizontal slippage in the quasi-static test of the shear wall. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the limiting structure of this utility model; In the diagram, 1 is a jack, 2 is a steel beam, 3 is a steel plate, 4 is a pressure beam, 5 is a fastening bolt, 6 is a wall, and 7 is a foundation beam. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Example: See Figure 1A horizontal slip restriction device for a quasi-static test of a shear wall includes a horizontal limiter. The horizontal limiter comprises two jacks 1 and a steel beam 2. The two jacks 1 are parallel and facing each other in their extension and contraction directions. A steel plate 3 is respectively provided at one of the facing ends (extension ends) of the two jacks 1. In practice, a steel plate 3 can also be provided at the other end (fixed end) of the jacks 1 to increase the force-bearing area and thus increase the friction. The two ends of the steel beam 2 are respectively connected to two (adjacent) steel plates 3, so that the displacement of the steel beam 2 in the direction perpendicular to its length is restricted.

[0016] Specifically, the steel beam 2 includes a rectangular beam body with a U-shaped groove on the upper end face along its length direction, and multiple stiffening plates are distributed at intervals along its length direction in the U-shaped groove, thereby improving its bending stiffness and strength.

[0017] In this embodiment, the steel beam 2 is fixedly connected to the steel plate 3, so that the steel beam 2 can transmit the horizontal force to the steel plate 3 or the jack 1. The horizontal force is borne by the friction between the steel plate 3 or the jack 1 and the channel wall, thus restricting the horizontal slippage of the steel beam 2 and consequently restricting the horizontal slippage of the shear wall.

[0018] As another preferred embodiment, in order to improve its applicability and better suit shear wall specimens of different sizes or test bench channels of different sizes, the steel beam 2 can also be non-fixedly connected to the steel plate 3. Specifically, the steel plate 3 has a slot, and during installation, the slot of the steel plate 3 should protrude from the channel so that the steel beam 2 can be engaged in the slot. In this way, the horizontal displacement of the steel beam 2 perpendicular to its length direction can be restricted, while the spacing between the two steel plates 3 can be unrestricted, thereby improving its adaptability.

[0019] In another preferred embodiment, the steel plate 3 is slidably connected to the steel beam 2 and can move along the length of the steel beam 2, thus allowing the entire horizontal limiter to adapt to different test benches. During implementation, a wedge-shaped slider (smaller at the top and larger at the bottom) is provided on the lower side of the steel beam 2, and correspondingly, a wedge-shaped groove (dovetail groove) is provided on the upper side of the steel plate 3, thereby enabling the steel plate 3 to slide freely along the steel beam 2.

[0020] In addition, this embodiment also includes a pressure beam 4 arranged parallel to the steel beam 2. The pressure beam 4 is provided with fastening bolts 5. The pressure beam 4 is used to limit the vertical displacement of the shear wall to ensure that it will not rotate or vertically displace under horizontal load.

[0021] Based on the above-mentioned horizontal sliding limiting device for quasi-static shear wall tests, this utility model also provides a limiting structure for the horizontal sliding limiting device for quasi-static shear wall tests, including a test platform, a shear wall specimen placed on the test platform, and the above-mentioned horizontal sliding limiting device for quasi-static shear wall tests. The test platform has two channels. During implementation, the test platform is a one-piece structure formed by concrete casting, or the two channels are directly formed by opening two channels in the ground. The shear wall specimen includes an integrally formed wall 6 and a foundation beam 7 at the lower end of the wall 6. The length of the foundation beam 7 is greater than the width of the wall 6. A horizontal limiting device is respectively installed at both ends of the foundation beam 7. Two steel beams 2 are located on the test platform and are tightly attached to the beam ends of the foundation beam 7. Two jacks 1 are respectively located in the two channels. Under the action of the jacks 1, the fixed ends of the jacks 1 are tightly attached to the side walls of the channels, thus fixing the horizontal limiting devices to the test platform. When the steel plate 3 is slidably connected to the steel beam 2, under the action of the jack 1, the steel plate 3 is also tightly attached to the side wall of the channel.

[0022] A pressure beam 4 is provided on the upper side of each end of the foundation beam 7. The two ends of the pressure beam 4 are located above the channel, and the fastening bolts 5 at both ends of the pressure beam 4 are fixedly connected to the bottom of the channel.

[0023] During the test, the shear wall specimen was placed in the preset positioning position, and two horizontal limiters were installed at both ends of the foundation beam 7, ensuring that the steel beam 2 was tightly attached to both ends of the foundation beam 7. Jack 1 was placed in the channel, and adjusted so that the fixed end of jack 1 and the steel plate 3 were tightly attached to the two walls of the channel. Then, the pressure beam 4 was installed, pressing it onto the foundation beam 7 and fixed to the bottom of the channel with fastening bolts 5. After fixing, a horizontal load was applied for a quasi-static test. The connection between the fastening bolts 5 and the channel is a conventional technique and will not be described further. Jack 1 can be either a hydraulic jack 1 or a mechanical jack 1; their specific structures and types are existing technologies and will not be elaborated further.

[0024] This invention uses a horizontal limiter jack 1 fixed in the channel of the test bench, and places the steel beam 2 on both sides of the foundation beam 7 of the shear wall specimen. When the shear wall is subjected to a quasi-static test, the steel beam 2 transmits the horizontal force to the steel plate 3. Finally, the friction between the steel plate 3 and the channel cancels out the horizontal force. At the same time, the vertical displacement of the specimen can be constrained by the pressure beam 4, while part of the horizontal force is shared by the friction force generated by the pressure beam 4. The structure is simple, the installation is convenient, and it can effectively limit the horizontal slippage in the quasi-static test of the shear wall.

[0025] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A horizontal slip limiting device for a quasi-static test of a shear wall, characterized in that, The device includes a horizontal limiter, which includes two jacks (1) and a steel beam (2). The two jacks are parallel to each other and are arranged in opposite directions. A steel plate (3) is provided at one end of each of the two jacks. The two ends of the steel beam are connected to the two steel plates respectively, so that the displacement of the steel beam in the direction perpendicular to its length is limited.

2. The horizontal slip limiting device for a quasi-static test of a shear wall according to claim 1, characterized in that, The steel beam includes a rectangular beam body, with a U-shaped groove opened on the upper end face of the beam body along its length direction, and multiple stiffening plates distributed at intervals along its length direction in the U-shaped groove.

3. The horizontal slip limiting device for a quasi-static test of a shear wall according to claim 1, characterized in that, The steel plate is slidably connected to the steel beam and can move along the length of the steel beam.

4. A horizontal slip limiting device for a quasi-static test of a shear wall according to any one of claims 1-3, characterized in that, It also includes a pressure beam (4) arranged parallel to the steel beam, and the pressure beam is provided with fastening bolts (5).

5. A horizontal slip limiting structure for a quasi-static test of a shear wall, comprising a test bench, a shear wall specimen, and a horizontal slip limiting device for a quasi-static test of a shear wall as described in any one of claims 1-4, wherein, The test bench has two channels, and the shear wall specimen is located between the two channels. It includes an integrally formed wall (6) and a foundation beam (7) at the lower end of the wall. The length of the foundation beam is greater than the width of the wall. The feature is that a horizontal limiter is set at each end of the foundation beam. The two steel beams are located on the test bench and are in close contact with the beam ends of the foundation beam. Two jacks are located in the two channels respectively. Under the action of the jacks, the fixed ends of the jacks are in close contact with the side walls of the channels, so that the horizontal limiter is fixed to the test bench.

6. The horizontal slip restriction structure for quasi-static testing of shear walls according to claim 5, characterized in that, A pressure beam is provided on the upper side of each end of the foundation beam. The two ends of the pressure beam are located above the channel, and the fastening bolts at both ends of the pressure beam are fixedly connected to the bottom of the channel.

7. The horizontal slip restriction structure for quasi-static testing of shear walls according to claim 5, characterized in that, The steel plate is slidably connected to the steel beam, and under the action of the jack, the steel plate is also tightly attached to the side wall of the channel.

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