Self-resetting swing column node with recoverable function

Abstract

The utility model relates to a building bearing structure, in particular to a self-resetting swing column joint with a recoverable function. Comprising a concrete foundation and an inverted-T-shaped concrete column, the bottom of the inverted-T-shaped concrete column is located in a groove body of the concrete foundation, and a space is reserved between the bottom and the periphery of the groove body; spring structures are uniformly distributed and connected between the bottom of the groove body of the concrete foundation and the bottom of the inverted T-shaped concrete column; shearing type mild steel damper rod pieces are uniformly distributed and connected between the inner wall of the groove body of the concrete foundation and the side wall of the bottom of the reverse T-shaped concrete column; a groove body of the concrete foundation is filled with an elastic body; the shearing type mild steel damper rod piece comprises a shaft sleeve hinged support, a shaft hinged support, a shaft, a mild steel bar and a shaft sleeve. According to the utility model, the recoverability of the structure is realized through the combination of the swinging structure and the energy consumption component; the problems that deformation of a main body structure can be recovered after an earthquake and key components are not damaged are solved.

Description

Technical Field

[0001] The utility model relates to a building load-bearing structure, in particular to a self-centering rocking column joint with recoverable function. Background Technique

[0002] Earthquake is a natural disaster with particularly great destructive power, and the losses it brings to mankind are extremely serious. The occurrence of earthquakes is uncertain, and it has a great impact on the living environment and life safety of mankind. Therefore, in the face of earthquakes, what we should do is not prediction, but to find effective ways to prevent earthquake damage. At present, many buildings need to be demolished because they cannot be repaired after an earthquake, and a large amount of manpower, material and financial resources are required. Therefore, the seismic resistance goal should not only meet the life safety of mankind, but also the post-earthquake repair is equally important.

[0003] A recoverable function structure refers to a structure that can recover its service function without repair or with minor repair after an earthquake. The recoverability of the structure function can be achieved through replaceable structures, self-centering structures, rocking structures, etc. There are three common forms of realizing the recoverable function of the structure: rocking mechanism, self-centering structure, and replaceable energy-dissipating components. The combination of these three can achieve better results. As a form of realizing the recoverable function structure, the rocking mechanism mainly reduces the lateral stiffness of the structure by disconnecting the connection between the component and the foundation or between components, thereby reducing the dynamic response of the structure under earthquake action and improving the seismic performance of the structure. However, a single rocking column has the problem of insufficient energy dissipation capacity and cannot effectively achieve self-centering ability.

[0004] In addition, in a frame structure, the wall does not bear the load, and the column is the main load-bearing component. During an earthquake, the frame column is damaged first, and a plastic hinge appears at the column foot, resulting in large deformation, which affects the stability of the structure. Once the frame column is damaged, the consequences will be unimaginable. Therefore, it is necessary to study the concrete column foot. Content of the Utility Model

[0005] The utility model overcomes the deficiencies of the prior art and provides a self-centering rocking column joint with recoverable function, which solves the problems of recoverable deformation of the main structure after an earthquake and damage-free of key components.

[0006] In order to achieve the above purpose, the utility model is realized by the following technical solutions.

[0007] A self-resetting swinging column node with recoverable function, comprising a concrete foundation and an inverted T-shaped concrete column. A groove is provided inwardly at the top of the concrete foundation. The bottom of the inverted T-shaped concrete column increases in cross-sectional area to form an inverted T-shaped column structure. The bottom of the inverted T-shaped concrete column is located in the groove and there is a space around it; Spring structures are evenly connected between the bottom of the groove of the concrete foundation and the bottom of the inverted T-shaped concrete column; Shearing type mild steel damper members are evenly connected between the inner wall of the groove of the concrete foundation and the side wall of the bottom of the inverted T-shaped concrete column; An elastomer is filled in the groove of the concrete foundation;

[0008] The shearing type mild steel damper member includes a sleeve hinge support, a shaft hinge support, a shaft, a mild steel bar and a sleeve; One end of the shaft is hinged to the shaft hinge support, the other end of the shaft is inserted into the sleeve, one end of the sleeve is slidably connected to the shaft, and the other end of the sleeve is hinged to the sleeve hinge support; The sleeve and the shaft are provided with a plurality of circular holes corresponding to each other in the axial direction, and a mild steel bar is penetrated through a group of corresponding circular holes of the sleeve and the shaft.

[0009] Furthermore, a bottom steel plate is embedded at the bottom of the groove in the concrete foundation, and side wall steel plates are embedded on the side walls of the groove in the concrete foundation; A column bottom steel plate is embedded at the bottom of the column bottom structure of the inverted T-shaped concrete column, and a column bottom side wall steel plate is embedded on the side wall of the column bottom structure of the inverted T-shaped concrete column.

[0010] Furthermore, high-strength springs are evenly connected between the bottom steel plate and the column bottom steel plate; The high-strength springs are welded to the bottom steel plate and the column bottom steel plate by alloy steel electrodes.

[0011] Furthermore, the shearing type mild steel damper members are connected between the column bottom side wall steel plate and the side wall steel plate by high-strength bolts.

[0012] Even further, the shearing type mild steel damper members are connected between the column bottom side wall steel plate and the side wall steel plate at an angle of 45°.

[0013] Furthermore, different lengths of steel bars are welded to the bottom steel plate, the side wall steel plate, the column bottom steel plate and the column bottom side wall steel plate.

[0014] Furthermore, the elastomer is a rubber material or a polyurethane material.

[0015] The beneficial effects of the present utility model relative to the prior art are as follows:

[0016] 1. The internal groove-shaped concrete foundation of the present utility model is connected to the inverted T-shaped concrete column by high-strength springs, weakening the connection stiffness of the nodes of the vertical load-bearing members, causing them to swing during an earthquake, thereby reducing the seismic motion effect or improving the inter-story displacement mode. At the same time, the high-strength springs have a buffering effect, offsetting part of the impact force through expansion and contraction, playing a role in shock absorption and buffering.

[0017] 2. The present utility model changes the stress mode of traditional frame columns, and an energy dissipation damper is installed between the foundation and the inverted T-shaped concrete column. During an earthquake, when the rocking column rocks, the mutual dislocation and extrusion between the shaft and the bushing will cause the mild steel bar to yield, thereby deforming the mild steel damper and playing a role in energy dissipation. The combination of the rocking structure and the energy dissipation component realizes the recoverability of the structure.

[0018] 3. The concave area between the foundation and the inverted T-shaped concrete column of the present utility model provides a rocking space for the column. At the same time, the elastic filling body has a buffering effect, restricting the rotation amplitude of the rocking column and avoiding excessive rotation angle and damaging the original structure. Description of the Drawings

[0019] Figure 1 It is a sectional view of the self-resetting rocking column joint with recoverable function described in the present utility model.

[0020] Figure 2 It is a structural schematic diagram of the shear-type damper member described in the present utility model.

[0021] In the figure:

[0022] 1 - Concrete foundation, 2 - Inverted T-shaped concrete column, 3 - Bottom steel plate, 4 - Sidewall steel plate, 5 - Column bottom steel plate, 6 - Column bottom sidewall steel plate, 7 - Shear-type mild steel damper member, 8 - High-strength spring, 9 - Elastic body, 101 - Bushing hinge support, 201 - Shaft hinge support, 401 - Mild steel bar, 501 - Bushing, 601 - Shaft. Detailed Embodiment

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. The technical solutions of the present utility model will be described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0024] See Figure 1 and Figure 2 , this embodiment proposes a self-resetting rocking column joint with recoverable function, which can be a connection joint between a concrete column and a foundation, or a connection joint between columns, etc.; for the connection joint between a concrete column and a foundation, it includes a concrete foundation 1 with a groove inside and an inverted T-shaped concrete column 2; a bottom steel plate 3 is embedded at the bottom of the groove in the concrete foundation 1, and a sidewall steel plate 4 is embedded on the sidewall of the groove in the concrete foundation 1;

[0025] The inverted T-shaped concrete column 2 is formed by increasing the cross-sectional area at the bottom, that is, the bottom of the inverted T-shaped concrete column 2 is a thick column bottom structure, the upper part is a conventional column body, and the bottom of the conventional column body is connected to the column bottom structure; the column bottom structure of the inverted T-shaped concrete column 2 and part of the conventional column body are located in the trough body of the concrete foundation 1; a column bottom steel plate 5 is pre-embedded in the bottom of the column bottom structure of the inverted T-shaped concrete column 2, and a column bottom side wall steel plate 6 is pre-embedded in the side wall of the column bottom structure of the inverted T-shaped concrete column 2; high-strength springs 8 are evenly connected between the bottom steel plate 3 and the column bottom steel plate 5; in this embodiment, the high-strength springs 8 are welded to the corresponding steel plates by alloy steel welding rods, and four groups of high-strength springs 8 are evenly arranged at the bottom of the inverted T-shaped concrete column 2. Shear-type mild steel damper rods 7 are evenly connected between the column bottom side wall steel plate 6 and the side wall steel plate 4; the remaining part in the groove of the concrete foundation 1 is filled with an elastomer 9, and the elastomer 9 can be made of high-damping rubber material or polyurethane material.

[0026] Specifically, the elastic body 9 is formed by filling the elastic material in the empty space of the groove body after the concrete foundation 1, the inverted T-shaped concrete column 2 and the embedded steel plates are cast, and the high-strength spring 8 and the shear-type mild steel damper rod 7 are installed.

[0027] When the bottom steel plate 3, the side wall steel plate 4, the column bottom steel plate 5, and the column bottom side wall steel plate 6 are pre-buried, steel bars of different lengths need to be welded to each steel plate, and then the pre-buried steel plates and steel bars are cast together.

[0028] Specifically, in this embodiment, the shear type mild steel damper rod 7 is connected between the inner wall of the concrete foundation 1 tank and the side wall of the column bottom structure of the inverted T-shaped concrete column 2 at an angle of 45°, and is connected to the embedded steel plates on the two side walls by bolts. The shear type mild steel damper rod 7 is mainly composed of a shaft sleeve hinge support 101, a shaft hinge support 201, a shaft 601, a mild steel rod 401 and a shaft sleeve 501. The shaft sleeve hinge support 101 is connected to the column bottom side wall steel plate 6 by high-strength bolts, and the shaft hinge support 201 is connected to the side wall steel plate 4 by high-strength bolts; one end of the shaft 601 is hinged to the shaft hinge support 201 by a hinge, and the other end of the shaft 601 is inserted into the shaft sleeve 501, one end of the shaft sleeve 501 is slidably connected to the shaft 601, and the other end of the shaft sleeve 501 is hinged to the shaft sleeve hinge support 101 by a hinge; the shaft sleeve 501 and the shaft 601 are provided with a plurality of circular holes corresponding to each other in the axial direction, and a soft steel rod 401 is penetrated through a group of circular holes corresponding to the shaft sleeve 501 and the shaft 601.

[0029] A method for making a self-resetting rocking column node with restorable function is as follows:

[0030] By using a template, first pour the bottom steel plate 3 at the inner bottom of the trough-shaped concrete foundation 1 together with the lower part of the concrete foundation 1. The high-strength spring 8 is welded to the steel plate with alloy steel electrodes. After pouring the inverted T-shaped concrete column 2, then pour the side wall of the concrete foundation 1;

[0031] Embedded steel plate: The steel bar is welded to the embedded steel plate and poured simultaneously with the trough-shaped concrete foundation 1 and the inverted T-shaped concrete column 2;

[0032] Connection of the high-strength spring 8: The requirement for the spring strength is relatively high. The high-manganese material is adopted, and the yield strength requirement is very high. It is welded with alloy steel electrodes with good crack resistance and high strength to ensure the service life after welding. One end is welded to the column bottom steel plate 5 at the bottom of the inverted T-shaped concrete column 2, and the other end is welded to the bottom steel plate 3 at the bottom of the foundation.

[0033] Connection of the shear-type mild steel damper rod 7: It is fixed on the side wall steel plate of the concrete foundation 1 and the side wall steel plate of the inverted T-shaped concrete column 2 by high-strength bolts. The high-strength bolt connection method is beneficial to subsequent replacement and maintenance.

[0034] The working principle of the self-centering rocking column joint with recoverable function of the present utility model is as follows:

[0035] After the concrete foundation 1 and the inverted T-shaped concrete column 2 are cast in place, a relatively large size is left around the inverted T-shaped concrete column 2, that is, the rocking column, in the sunken trough of the concrete foundation 1 to provide space for the rotation of the rocking column. Under different seismic actions, the rocking column can rotate in any direction. In order to prevent the rotation angle from being too large and causing damage to the concrete due to the collision between the concrete foundation 1 and the inverted T-shaped concrete column 2, an elastomer 9 is filled between the concrete foundation 1 and the inverted T-shaped concrete column 2. The elastomer 9 has a buffering effect, limits the rotation amplitude of the rocking column, and at the same time, the high-damping rubber material can also absorb energy and reduce the seismic action.

[0036] Under the action of minor earthquakes, the high-strength spring 8 plays a role in supporting and buffering. It not only transmits the vertical axial force but also enables the column to rotate. Through the mutual conversion of energy, seismic energy is consumed. When a major earthquake occurs, the energy dissipation capacity of the rocking column decreases and the displacement increases significantly. A shear-type mild steel damper member 7 that integrates energy dissipation and self-centering is installed between the side wall of the concrete foundation 1 and the side wall of the inverted T-shaped concrete column 2. This can not only reduce the residual displacement of the structure but also improve the energy dissipation performance, achieving the purpose of self-centering and energy dissipation, and is easy to repair after the earthquake. The structure is connected to the sleeve hinge support 101 and the shaft hinge support 201 through high-strength bolts. The sleeve 501 and the shaft 601 are provided with circular holes axially. Each mild steel bar 401 passes through each circular hole. When an earthquake occurs and the rocking column rocks, the mutual dislocation and extrusion between the shaft 601 and the sleeve 501 will cause the mild steel bar 401 to yield, thereby deforming the mild steel damper and playing a role in energy dissipation, and making the rocking column return to its initial position.

[0037] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific embodiments of the present utility model are limited to this. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the premise of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the patent protection scope determined by the claims submitted for the present utility model.

Claims

1. A self-resetting rocking column node with restorable function, characterized in that: The invention comprises a concrete foundation (1) and an inverted T-shaped concrete column (2), wherein a groove is arranged inwardly at the top of the concrete foundation (1), and the bottom of the inverted T-shaped concrete column (2) has an increased cross-sectional area to form an inverted T-shaped column structure, wherein the bottom of the inverted T-shaped concrete column (2) is located in the groove and has a space around the groove; a spring structure is evenly connected between the bottom of the groove of the concrete foundation (1) and the bottom of the inverted T-shaped concrete column (2); a shear-type soft steel damper rod (7) is evenly connected between the inner wall of the groove of the concrete foundation (1) and the side wall of the bottom of the inverted T-shaped concrete column (2); and an elastic body (9) is filled in the groove of the concrete foundation (1); The shear-type mild steel damper rod (7) comprises a shaft sleeve hinge support (101), a shaft hinge support (201), a shaft (601), a mild steel rod (401) and a shaft sleeve (501); one end of the shaft (601) is hinged to the shaft hinge support (201) via a hinge, the other end of the shaft (601) is inserted into the shaft sleeve (501), one end of the shaft sleeve (501) is slidably connected to the shaft (601), and the other end of the shaft sleeve (501) is hinged to the shaft sleeve hinge support (101) via a hinge; the shaft sleeve (501) and the shaft (601) are provided with a plurality of circular holes corresponding to each other in the axial direction, and a mild steel rod (401) is penetrated through a group of circular holes corresponding to each other in the shaft sleeve (501) and the shaft (601).

2. A self-resetting rocking column node with restorable function according to claim 1, characterized in that: A bottom steel plate (3) is pre-embedded in the bottom of the trough body in the concrete foundation (1), and a side wall steel plate (4) is pre-embedded in the side wall of the trough body in the concrete foundation (1); a column bottom steel plate (5) is pre-embedded in the bottom of the column bottom structure of the inverted T-shaped concrete column (2), and a column bottom side wall steel plate (6) is pre-embedded in the side wall of the column bottom structure of the inverted T-shaped concrete column (2).

3. A self-resetting rocking column node with restorable function according to claim 2, characterized in that: High-strength springs (8) are evenly connected between the bottom steel plate (3) and the column bottom steel plate (5); the high-strength springs (8) are welded to the bottom steel plate (3) and the column bottom steel plate (5) by means of alloy steel welding rods.

4. A self-resetting rocking column node with restorable function according to claim 2, characterized in that: The shear-type mild steel damper rod (7) is connected between the column bottom side wall steel plate (6) and the side wall steel plate (4) by means of high-strength bolts.

5. A self-resetting rocking column node with restorable function according to claim 4, characterized in that: The shear-type mild steel damper rod (7) is connected between the column bottom side wall steel plate (6) and the side wall steel plate (4) at an angle of 45°.

6. A self-resetting rocking column node with restorable function according to claim 2, characterized in that: The bottom steel plate (3), the side wall steel plate (4), the column bottom steel plate (5), and the column bottom side wall steel plate (6) are all welded with steel bars of different lengths.

7. A self-resetting rocking column node with restorable function according to claim 1, characterized in that: The elastic body (9) is made of rubber material or polyurethane material.

Images