A combined energy dissipation assembled shear wall horizontal connection device

Abstract

The present invention relates to a combined energy-dissipating assembled shear wall horizontal connection device. Upper and lower shear walls are connected via a buckling-resistance steel rod and a connection assembly with a friction damper. The connection assembly includes a lower pre-embedded connecting steel plate, a friction pair, and an upper pre-embedded T-shaped connecting steel plate, which are sequentially connected in a longitudinal horizontal direction. The upper pre-embedded T-shaped connecting steel plate and the lower pre-embedded connecting steel plate are connected to the upper and lower precast concrete shear walls via anchor bars. The web-surface overlaps of the upper and lower pre-embedded T-shaped connecting steel plates are provided with a plurality of screws. The screws sequentially penetrate the lower pre-embedded connecting steel plate, the friction pair, and the upper pre-embedded T-shaped connecting steel plate in a longitudinal horizontal direction and are then connected to nuts. During connection, the ends of the buckling-resistance steel rod are respectively welded to the concave rings at the anchor plates of the upper and lower pre-embedded connecting steel plates. The present invention has a simple structure, simplifies the complexity of the vertical connection of assembled concrete shear walls, improves the energy dissipation capacity of the assembled shear walls, and enables the structure to achieve superior seismic performance and post-earthquake recoverability.

Description

Technical Field

[0001] The invention relates to a horizontal combined energy dissipation connection device for assembled shear walls, belonging to the technical field of assembled building structure node connections. Background Art

[0002] Prefabricated buildings can effectively improve the quality and efficiency of construction, significantly reduce environmental pollution, and better promote the industrialization of construction and housing, making them an important part of the structural adjustment of the construction industry. Prefabricated shear wall structural systems have a high prefabrication rate, sufficient load-bearing capacity and lateral stiffness, and can greatly increase the stiffness and seismic resistance of buildings. However, there are also a large number of joints in prefabricated shear wall structures. While the provision of joints in prefabricated shear wall structural systems can improve the ductility of the wall, it will also weaken the overall stiffness of the wall, and the ultimate bearing capacity of the precast concrete shear wall will also be reduced. The horizontal connection structure and performance between the upper and lower shear walls in the prefabricated shear wall structural system are key factors affecting the overall safety performance of the structure. Currently, prefabricated shear wall structural systems generally have problems such as complex connection node structural design, difficult construction, and weak shear wall energy dissipation capacity.

[0003] Therefore, while meeting the anti-cracking requirements for normal use of the building and the seismic fortification goal of "no damage in small earthquakes", the use of bolted connections in horizontal joints can facilitate construction and improve construction efficiency. Setting energy-absorbing materials in the horizontal joints can enable the structure to obtain better seismic performance in terms of bearing capacity and ductility.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In response to the problems existing in the horizontal joints of existing prefabricated shear wall structures, the present invention provides a combined energy-dissipating prefabricated shear wall horizontal dry connection device, in which the anti-buckling steel rod and the friction damper jointly participate in the structural energy dissipation. The anti-buckling steel rod is arranged at the hidden column position at the end of the shear wall to improve the energy dissipation capacity of the wall under the action of bending moment and axial force. The friction damper adopts a shear-type structure, and the two outer steel plates bear the axial pressure of the shear wall. Under the action of shear force, the friction damper frictionally dissipates energy. The upper and lower embedded connecting steel plates are connected by bolts, which is conducive to industrial production and post-earthquake repair. The improvement of the energy dissipation capacity of the prefabricated shear wall enables the structure to obtain more suitable seismic performance in the mutual coordination of bearing capacity and ductility.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a combined energy dissipation assembled shear wall horizontal connection device, including an anti-buckling steel rod and a connection component with a friction damper, the upper and lower shear walls are connected by the anti-buckling steel rod and the connection component with a friction damper, the connection component includes a lower pre-buried connection steel plate, a friction pair and an upper pre-buried T-shaped connection steel plate connected in sequence along the longitudinal horizontal direction, the upper pre-buried T-shaped connection steel plate and the lower pre-buried connection steel plate are respectively connected to the upper and lower precast concrete shear walls through anchor bars, the upper pre-buried T-shaped connection steel plate is connected to the upper and lower precast concrete shear walls through anchor bars, and the upper pre-buried T-shaped connection steel plate is connected to the upper and lower precast concrete shear walls through anchor bars. There are several screws on the overlapping surfaces of the webs of the connecting steel plate and the lower embedded connecting steel plate, which are connected to the nuts after passing through the lower embedded connecting steel plate, the friction pair and the upper embedded T-shaped connecting steel plate in the longitudinal horizontal direction. A pair of friction pairs are sandwiched between the upper embedded T-shaped connecting steel plate and the lower embedded connecting steel plate; four concave rings are provided at both ends of the anchor plates of the lower embedded connecting steel plate and the upper embedded T-shaped connecting steel plate. When connected, the two ends of the anti-buckling steel rod are respectively connected to the concave rings at the anchor plates of the upper embedded T-shaped connecting steel plate and the lower embedded connecting steel plate by welding.

[0007] Furthermore, the length of the upper pre-embedded T-shaped connecting steel plate web is slightly shorter than the length of the lower pre-embedded connecting steel plate web, and the longitudinal height of the friction pair is the same as the length of the upper pre-embedded T-shaped steel plate web. When connected, a certain gap is left between the bottom of the upper pre-embedded T-shaped connecting steel plate web and the inner surface of the lower pre-embedded connecting steel plate anchor plate, the lower end of the friction pair is flush with the inner surface of the lower connecting steel plate anchor plate, and a gap is left between the upper end of the friction pair and the inner surface of the upper connecting T-shaped steel plate.

[0008] Furthermore, the lower embedded connecting steel plate, the friction pair and the web of the upper embedded T-shaped connecting steel plate are connected by high-strength bolts arranged along the longitudinal horizontal direction.

[0009] Furthermore, the web of the upper pre-embedded T-shaped connecting steel plate and a pair of friction pairs are each provided with two through-long holes for the screws to pass through, and the lower pre-embedded connecting steel plate is provided with a plurality of circular holes for the screws to pass through.

[0010] Furthermore, the friction pair is made of a metal material with good friction properties, including bronze, brass or aluminum alloy.

[0011] Compared with the existing assembled shear wall horizontal connection device, the combined energy dissipation assembled shear wall horizontal connection device of the present invention has the following beneficial effects:

[0012] 1) The present invention adopts the "anti-buckling steel rod + friction damper + connecting steel plate + high-strength bolt" connection method. The anti-buckling steel rod is set at the hidden column position at the end of the shear wall to improve the energy dissipation capacity of the wall under the action of bending moment and axial force. The friction damper adopts a shear-type structure. The two outer steel plates also bear the axial pressure of the shear wall. Under the action of shear force, the friction damper frictionally dissipates energy. The combined energy dissipation at the horizontal seam position is composed of the friction damper and the anti-buckling steel rod. This connection method ensures the integrity of the shear wall structure while taking into account its bearing capacity and energy dissipation capacity.

[0013] 2) The present invention greatly simplifies the complexity of connecting the upper and lower shear walls of the assembled concrete shear wall structure, simplifies the construction process, improves the construction efficiency and also ensures the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the combined energy dissipation assembled shear wall horizontal connection device of the present invention;

[0015] Figure 2 for Figure 1 Side view of;

[0016] Figure 3 for Figure 1 A partial enlarged view of the connection;

[0017] Figure 4 for Figure 3 Side view of;

[0018] Figure 5 for Figure 1 A partially enlarged front view of the connection after assembly is completed;

[0019] Figure 6 for Figure 5 side view.

[0020] Explanation of the accompanying figures: 1: upper embedded T-shaped connecting steel plate; 2: screw; 3: anti-buckling steel rod; 4: friction pair; 5: lower embedded connecting steel plate; 6: nut; 7: concave ring of the anti-buckling steel rod. DETAILED DESCRIPTION

[0021] The following will describe in detail the combined energy dissipation assembled shear wall horizontal connection device of the present invention with reference to the drawings. This embodiment is implemented on the premise of the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments. Those skilled in the art can modify and polish it without changing the spirit and content of the present invention.

[0022] like Figures 1 to 6As shown, an embodiment of the present invention provides a combined energy dissipation assembled shear wall horizontal connection device, including an anti-buckling steel rod and a connection assembly with a friction damper. The diameter of the anti-buckling steel rod 3 is between 20 and 25 mm. Four concave rings 7 are provided on both sides of the anchor plate of the upper pre-embedded T-shaped connecting steel plate 1 and the lower pre-embedded connecting steel plate 5. The diameter of the concave ring 7 can be 1 to 2 mm larger than the diameter of the steel rod 3. When connecting, the ends of the anti-buckling steel rod 3 are respectively welded to the four concave rings 7 provided on the upper pre-embedded T-shaped connecting steel plate 1 and the lower pre-embedded connecting steel plate 5.

[0023] The connection assembly with a friction damper comprises a lower pre-embedded connecting steel plate 5, a friction pair 4, and an upper pre-embedded T-shaped connecting steel plate 1, connected in sequence along the longitudinal horizontal direction. The upper pre-embedded connecting steel plate 1 and the lower pre-embedded connecting steel plate 5 are connected to the upper and lower precast concrete shear walls via anchor bars. Several screws 2 are located on the overlapping surfaces of the webs of the upper and lower pre-embedded connecting steel plates. These screws 2 extend through the lower pre-embedded connecting steel plate 5, the friction pair 4, and the upper pre-embedded T-shaped connecting steel plate 1 in the longitudinal horizontal direction before being connected to nuts 6. Friction pairs 4 are located between the webs of the upper and lower pre-embedded connecting steel plates. The friction pairs 4 are sandwiched between the upper pre-embedded T-shaped connecting steel plate 1 and the lower pre-embedded connecting steel plate 5. When connected, the three are secured together using screws 2 and nuts 6. The friction pairs 4 are made of a metal with excellent friction properties, such as bronze, brass, or aluminum alloy. Their specific thickness is determined based on the required energy dissipation of the shear wall. Two rows of screws 2 are provided, and the number of screws in each row can be controlled using performance-based design methods. The web of the upper pre-embedded T-shaped connecting steel plate 1 and the pair of friction pairs 4 are each provided with two through-holes for the screws 2 to pass through. The lower pre-embedded connecting steel plate 5 is provided with several circular holes for the screws 2 to pass through. All circular holes have the same diameter and are spaced evenly. The diameter of the circular holes can be 1 to 2 mm larger than the diameter of the screws 2. The web length of the upper pre-embedded T-shaped connecting steel plate 1 is slightly shorter than that of the lower pre-embedded connecting steel plate 5. The longitudinal height of the friction pairs is the same as the web length of the upper pre-embedded T-shaped steel plate. When connected, a certain gap is left between the bottom of the web of the upper pre-embedded T-shaped connecting steel plate and the inner surface of the anchor plate of the lower pre-embedded connecting steel plate. The lower end of the friction pair is flush with the inner surface of the anchor plate of the lower connecting steel plate, and a gap is left between the upper end of the friction pair and the inner surface of the upper connecting T-shaped steel plate.

Claims

1. A combined energy dissipation assembled shear wall horizontal connection device, characterized by: The treads are connected to the upper and lower shear walls by means of the anti-buckling steel rod and the connection assembly with the friction damper. The connection assembly comprises a lower pre-buried connection steel plate, a friction pair and an upper pre-buried T-shaped connection steel plate which are sequentially connected in the longitudinal horizontal direction. The upper pre-buried T-shaped connection steel plate and the lower pre-buried connection steel plate are respectively connected to the upper and lower precast concrete shear walls through anchor bars. The web overlap surfaces of the upper pre-buried T-shaped connection steel plate and the lower pre-buried connection steel plate are respectively provided with a plurality of screws which pass through the lower pre-buried connection steel plate, the friction pair and the upper pre-buried T-shaped connection steel plate in the longitudinal horizontal direction and are then connected to the nuts. A pair of friction pairs are connected to the upper pre-buried T-shaped connection steel plate and the lower pre-buried connection steel plate. The connecting steel plate is sandwiched in the middle; four concave rings are respectively provided at both ends of the lower pre-embedded connecting steel plate and the upper pre-embedded T-shaped connecting steel plate anchor plate. When connecting, the two ends of the anti-buckling steel rod are respectively welded with the concave rings at the anchor plates of the upper pre-embedded T-shaped connecting steel plate and the lower pre-embedded connecting steel plate for connection; the length of the web of the upper pre-embedded T-shaped connecting steel plate is slightly shorter than the length of the web of the lower pre-embedded connecting steel plate, and the longitudinal height of the friction pair is the same as the length of the web of the upper pre-embedded T-shaped steel plate. When connected, a certain gap is left between the bottom of the web of the upper pre-embedded T-shaped connecting steel plate and the inner surface of the anchor plate of the lower pre-embedded connecting steel plate, the lower end of the friction pair is flush with the inner surface of the anchor plate of the lower connecting steel plate, and a gap is left between the upper end of the friction pair and the inner surface of the upper connecting T-shaped steel plate.

2. The combined energy dissipation assembled shear wall horizontal connection device according to claim 1 is characterized in that: The lower pre-buried connecting steel plate, the friction pair and the web of the upper pre-buried T-shaped connecting steel plate are connected by high-strength bolts arranged along the longitudinal horizontal direction.

3. The combined energy dissipation assembled shear wall horizontal connection device according to claim 1 is characterized in that: The web of the upper pre-buried T-shaped connecting steel plate and a pair of friction pairs are each provided with two through-long holes for the screws to pass through, and the lower pre-buried connecting steel plate is provided with a plurality of circular holes for the screws to pass through.

4. The combined energy dissipation assembled shear wall horizontal connection device according to claim 1, characterized in that: The friction pair is made of metal materials with good friction properties, including bronze, brass or aluminum alloy.

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