T-shaped recoverable vertical connection structure

Abstract

The application discloses a T-shaped recoverable vertical connecting structure, which comprises at least one structural unit, the structural unit comprises a left wall body, a right wall body, a left T-shaped steel, a right T-shaped steel, a friction limiter, a pre-tensioning rod and high-strength bolts, the T-shaped steel is connected with the wall body through the high-strength bolts, the plate of the friction limiter is connected with the web of the T-shaped steel through the high-strength bolts, and the two ends of the pre-tensioning rod are respectively anchored on the outer plate of the friction limiter through anchorage devices. The application is applied to the vertical connection of structures such as shear walls, and the self-resetting and energy consumption performance of the vertical connection can improve the lateral resistance of the structures such as shear walls.

Description

Technical Field

[0001] The invention belongs to the field of civil engineering and relates to a T-shaped recoverable vertical connection structure. Background Art

[0002] Reinforced concrete walls are a widely used lateral force-resisting ductile system in building structures. Historical earthquake damage experience has shown that reinforced concrete walls are prone to forming a failure zone at their base, which dissipates seismic energy through plastic hinges and incurs significant repair costs after the earthquake. To improve the construction quality and progress of walls, efficient construction methods have emerged on the market that involve factory prefabrication and on-site assembly. However, the resulting vertical joints undermine the integrity of the wall. When brittle failure occurs in the vertical connection, the lateral resistance of the adjacent walls will be significantly weakened. When the vertical connection dissipates energy ductilely, the residual deformation of the adjacent walls will increase significantly. Therefore, it is necessary to ensure that the vertical connection of the wall has both load-bearing capacity and self-recovery ability. The present invention provides a T-shaped recoverable vertical connection structure that absorbs seismic energy through frictional sliding between the web of the T-steel and the friction limiter, and achieves a self-recovery function through the restoring force of the pre-tension rod. In addition, the friction force and restoring force in the structure can be adjusted by changing the preload force in the high-strength bolts and the initial prestress in the pre-tension rod, respectively, so that the structure can meet different levels of seismic resistance requirements. Compared with the previous vertical connection technology, the present invention has the advantages of being adjustable as needed, simple in structure, convenient in construction, and easy to replace. Summary of the Invention

[0003] Technical problem: The present invention provides a T-shaped recoverable vertical connection structure that can effectively avoid brittle failure and has good energy dissipation capacity and self-resetting function.

[0004] Technical solution: The T-shaped restorable vertical connection structure of the present invention includes at least one structural unit, wherein the structural unit includes a left wall and a right wall arranged apart, a left T-shaped steel and a right T-shaped steel with the same cross-section, the flange of the left T-shaped steel is bolted to the left wall, the flange of the right T-shaped steel is bolted to the right wall, two friction limiters are located on the longitudinal sides of the left T-shaped steel and the right T-shaped steel, and two sets of pre-tension rods are located at the web position of the left T-shaped steel and the right T-shaped steel.

[0005] Furthermore, the T-shaped recoverable vertical connection structure of the present invention is characterized in that the friction limiter includes an outer plate with a square hole reserved, two gusset plates connected to the outer plate with multiple round holes reserved, the pre-tension rod (6) passes through the square hole and is fixed to the outer plate by an anchoring device, and the webs of the left T-steel and the right T-steel are connected to the two gusset plates located on the outside of the webs by high-strength bolts.

[0006] Furthermore, the T-shaped restorable vertical connection structure of the present invention has rectangular slots for high-strength bolts to be inserted into the webs of the left T-steel and the right T-steel at the places where they are connected to the tie plates, and multiple circular holes for high-strength bolts to be inserted into the flanges of the left T-steel and the right T-steel at the places where they are connected to the left wall and the right wall.

[0007] Furthermore, the T-shaped restorable vertical connection structure of the present invention is characterized in that the structure includes a plurality of structural units that are sequentially connected in the vertical direction and share the left and right walls.

[0008] Furthermore, the T-shaped restorable vertical connection structure of the present invention is characterized in that the structure includes a plurality of structural units sequentially connected in the horizontal direction, and two adjacent structural units share a wall.

[0009] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0010] (1) The present invention can effectively reduce plastic damage at the bottom of the wall under earthquake action. Traditional reinforced concrete walls dissipate most of the earthquake energy through premature yielding and plastic deformation in the bottom area, which is not only difficult to repair but also more likely to cause structural collapse. The vertical connection in the present invention increases the lateral constraint of the wall and effectively reduces the damage to the bottom of the wall through its sufficient resettable energy dissipation capacity.

[0011] (2) The present invention uses the relative sliding of the friction limiter as the shear force transmission method of the vertical connection, effectively integrating the friction energy dissipation and self-reset function. The change in the magnitude of the friction force can be achieved by changing the number and preload of the high-strength bolts, as well as the initial prestress of the pre-tension rod. When the pretension applied to the pre-tension rod overcomes the sliding friction force, the structure can achieve complete self-reset, making the energy dissipation capacity and recovery capacity of the structure controllable.

[0012] (3) The vertical connection structure of the present invention is simple in construction and suitable for large-scale industrial production and manufacturing. Not only can the structure be prefabricated in a factory, it is also easy to install and disassemble, enabling sustainable use of the connection device and providing good economic benefits. Since it does not involve complex processing techniques, manufacturers can carry out industrial production without making major adjustments, thereby reducing the difficulty and cost of manufacturing and achieving high price competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional schematic diagram of the device of the present invention;

[0014] Figure 2 It is a front view of the device of the present invention;

[0015] Figure 3 for Figure 2 3D schematic diagram of the T-shaped steel;

[0016] Figure 4 for Figure 2 3D schematic diagram of the friction limiter;

[0017] Figure 5 The working diagram of the device of the present invention when it moves to the left Figure 1 ;

[0018] Figure 6 This is a schematic diagram of the working of the device of the present invention when it moves to the right Figure 2 ;

[0019] In the figure, there are: left wall 1, right wall 2, left T-shaped steel 3, right T-shaped steel 4, rectangular slot 41, round hole 42, friction limiter 5, outer plate 51, gusset plate 52, round hole 53, square hole 54, and pre-tension rod 6. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, the T-shaped restorable vertical connection structure of the present invention includes at least one structural unit, which includes a left wall 1 and a right wall 2 arranged at intervals, a left T-shaped steel 3 and a right T-shaped steel 4 with the same cross-section, the flange of the left T-shaped steel 3 is bolted to the left wall 1, the flange of the right T-shaped steel 4 is bolted to the right wall 2, two friction limiters 5 located on the longitudinal sides of the left T-shaped steel 3 and the right T-shaped steel 4, and two groups of pre-tension rods 6 located at the web positions of the left T-shaped steel 3 and the right T-shaped steel 4. The friction limiter 5 includes an outer plate 51 with a square hole 54 reserved, two gusset plates 52 connected to the outer plate 51 with a plurality of circular holes 53 reserved, the pre-tension rod 6 passes through the square hole 54 and is fixed to the outer plate 51 by an anchoring device, and the webs of the left T-shaped steel 3 and the right T-shaped steel 4 are connected to the two gusset plates 52 located on the outside of the webs by high-strength bolts. The webs of the left T-shaped steel 3 and the right T-shaped steel 4 are respectively provided with rectangular slots 41 for high-strength bolts to penetrate at the places where they are connected to the gusset plates 52, and the flanges of the left T-shaped steel 3 and the right T-shaped steel 4 are respectively provided with multiple circular holes 42 for high-strength bolts to penetrate at the places where they are connected to the walls 1 and 2.

[0021] Bolt holes can be embedded in the left and right walls 1 and 2 to facilitate bolt connections with the left and right T-shaped steel sections 3 and 4. The integrity of the vertical connection is achieved by the preload force of the high-strength bolts between the tie plates and the initial prestressing of the pre-tension rods between the outer plates. The pre-tension rods can be made of hyperelastic materials such as fiber-reinforced composites such as GFRP, CFRP, AFRP, and BFRP, as well as shape memory alloys (SMAs). The initial prestress applied by the pre-tension rods between the outer plates should be greater than the sliding friction generated by the preload force of the bolts between the tie plates.

[0022] The working principle of the T-shaped recoverable vertical connection structure of the present invention is as follows: Figures 5 and 6As shown: when the wall body occurs lateral deformation, the adjacent wall bodies respectively drive the T-shaped steel connected with them to produce the trend of mutual dislocation, when the dislocation external force is greater than the sum of the initial prestress applied by the pre-tension rod between the outer plates and the sliding friction force generated by the bolt pre-tightening force, the relative sliding of the left T-shaped steel 3 and the right T-shaped steel 4 will be caused, and then the friction limiter 5 is pushed open, causing the gap between the left T-shaped steel 3, the right T-shaped steel 4 and the outer plate 51, in this process, the pre-tension rod 6 is gradually elastically elongated, and the friction limiter 5 is pushed open in the process of friction sliding to dissipate the seismic energy. When the lateral load disappears, the initial prestress applied by the pre-tension rod overcomes the sliding friction force generated by the bolt pre-tightening force, so that the structure returns to the initial position, and therefore the vertical connection effectively combines the friction energy dissipation and self-resetting functions.

Claims

1. T-shaped recoverable vertical connection structure, characterized by: The structure comprises at least one structural unit, wherein the structural unit comprises a left wall and a right wall arranged apart, a left T-shaped steel and a right T-shaped steel of the same cross-section, a flange of the left T-shaped steel being bolted to the left wall, a flange of the right T-shaped steel being bolted to the right wall, two friction limiters located on the longitudinal sides of the left T-shaped steel and the right T-shaped steel, and two sets of pre-tension rods located at the web positions of the left T-shaped steel and the right T-shaped steel; The friction limiter includes an outer plate with a square hole reserved therein, and two gusset plates connected to the outer plate with multiple round holes reserved therein. The pre-tension rod passes through the square hole and is fixed to the outer plate by an anchor device. The webs of the left and right T-shaped steels are connected to the two gusset plates located outside the webs by high-strength bolts. The webs of the left T-shaped steel and the right T-shaped steel are respectively provided with rectangular slots for high-strength bolts to be inserted at the places where they are connected to the tie plates, and the flanges of the left T-shaped steel and the right T-shaped steel are respectively provided with multiple circular holes for high-strength bolts to be inserted at the places where they are connected to the left wall and the right wall.

2. The T-shaped recoverable vertical connection structure according to claim 1, characterized in that: The structure includes a plurality of structural units which are sequentially connected in the vertical direction and share a left wall and a right wall.

3. The T-shaped recoverable vertical connection structure according to claim 1, characterized in that: The structure includes a plurality of structural units connected in sequence in a horizontal direction, and two adjacent structural units share a wall.

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