Built-in u-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components

Abstract

The application belongs to the field of building components, and particularly relates to a built-in U-shaped embedded shearing metal damper for energy dissipation and shock absorption between adjacent components. The technical scheme is as follows: two core energy dissipation plates and two U-shaped embedded parts are included, the core energy dissipation plate is a I-shaped structure formed by a web plate and flange plates fixed at both ends of the web plate, the web plate is provided with two round holes; two rectangular through holes are arranged on the vertical center line of the bottom surface of the U-shaped embedded part; the two U-shaped embedded parts are oppositely arranged, the two ends of the web plate are respectively inserted into the rectangular through holes of the two U-shaped embedded parts, the flange plates are respectively fixed at the two ends of the web plate, and the two core energy dissipation plates lock the two U-shaped embedded parts; the two U-shaped embedded parts are respectively embedded in two adjacent components, and the core energy dissipation plate is located at the joint between the two components. The application can bear shearing energy dissipation under the action of earthquake and wind vibration, improve the energy dissipation and shock absorption capacity of the building, and reduce the damage of the building components in the earthquake center.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of building components, and particularly relates to a built-in U-shaped embedded shear metal damper for energy dissipation and shock absorption between adjacent components. BACKGROUND

[0002] In the field of building structures and bridge engineering, energy dissipation and shock absorption technology is a key means to improve the seismic and wind resistance performance of structures, and metal dampers are widely used in energy dissipation of adjacent components (such as beam-column joints, shear wall and frame connection parts) due to their stable mechanical properties, strong energy dissipation capacity and good durability.

[0003] Most existing metal dampers use core energy dissipation plates with planar structures such as linear and cross-shaped structures to achieve energy dissipation through tensile or bending deformation. However, in actual engineering, when the damper needs to be built-in between adjacent components, the traditional structure has the following limitations: first, the installation space adaptability is poor, and it is difficult to achieve compact pre-embedded arrangement due to the limitation of component spacing; second, the energy dissipation mode is single, and it simply relies on bending or tensile deformation, which has low energy dissipation efficiency under shear load dominated conditions; third, the connection reliability with the component is insufficient, and the pre-embedded fixing method is prone to premature failure due to stress concentration, which affects the overall shock absorption effect. In addition, the core metal plate and the pre-embedded component of some dampers have poor cooperative performance, and under repeated load, problems such as loose connection and uncoordinated deformation easily occur, leading to premature failure of the damper and failing to fully play the energy dissipation role. SUMMARY

[0004] The present application provides a built-in U-shaped embedded shear metal damper for energy dissipation and shock absorption between adjacent components, which can utilize the relative displacement of adjacent components caused by earthquake and wind vibration to make the core energy dissipation plate bear shear energy dissipation, improve the energy dissipation and shock absorption capacity of buildings, reduce the damage of building components in the epicenter, and reduce the post-earthquake repair cost of buildings.

[0005] The technical solution of the present application is as follows:

[0006] The built-in U-shaped embedded shear metal damper for energy dissipation and shock absorption between adjacent components comprises two core energy dissipation plates and two U-shaped embedded parts, the core energy dissipation plate is an I-shaped structure formed by a web plate and flange plates fixed at both ends of the web plate, the web plate is provided with two round holes; the bottom surface of the U-shaped embedded part is provided with two rectangular through holes on the vertical center line; the two U-shaped embedded parts are placed opposite to each other, the two ends of the web plate are inserted into the rectangular through holes of the two U-shaped embedded parts respectively, the flange plates are fixed at both ends of the web plate respectively, and the two core energy dissipation plates lock the two U-shaped embedded parts; the two U-shaped embedded parts are embedded in the adjacent two components respectively, and the core energy dissipation plate is located at the gap between the two components.

[0007] Further, the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components has a core energy dissipation plate material of LY100 low yield steel.

[0008] Further, the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components has a web length-width ratio of 1:1.

[0009] Further, the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components has a web length-width ratio of 1:1.

[0010] Further, the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components has a web length-width ratio of 1:1.

[0011] Further, the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components has a web length-width ratio of 1:1.

[0012] The built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components has the following beneficial effects:

[0013] 1. The U-shaped pre-embedded part of the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components is designed in a U-shaped cross section and can adapt to the narrow gap between adjacent components, is installed internally and does not occupy additional space, is particularly suitable for pre-embedded node structure, has easy-to-control installation precision and can be performed synchronously with component construction, and forms an integral stress system with component concrete, avoids bolt loosening or anchor pulling out and improves the durability of the damper under repeated loads.

[0014] 2. The core energy dissipation plate of the built-in U-shaped pre-embedded shear metal damper for energy dissipation and shock absorption between adjacent components is dominated by shear deformation, has an energy dissipation capacity improved by more than 30% under the same cross section size compared with traditional bending dampers and has stable energy dissipation.

[0015] 3. The combination of the U-shaped pre-embedded part and the core energy dissipation plate can effectively prevent out-of-plane displacement of adjacent components. When adjacent components produce relative shear displacement due to earthquake, vibration or the like, the web of the core energy dissipation plate is subjected to reverse force transmitted by the two flange plates and occurs shear plastic deformation, thereby dissipating input structure energy through yield energy dissipation of metal materials; at the same time, the flange plates assist energy dissipation through small bending deformation, forming a composite energy dissipation mode of "shear as the main and bending as the auxiliary". The U-shaped pre-embedded part rigidly fixes the damper and the component, ensures load full-section transmission and avoids damage of the connecting part prior to the core energy dissipation plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1This is a schematic diagram of a built-in U-shaped embedded shear metal damper used for energy dissipation and vibration reduction between adjacent components.

[0017] Figure 2 This is a front view of a built-in U-shaped embedded shear metal damper used for energy dissipation and vibration reduction between adjacent components;

[0018] Figure 3 This is a top view of a built-in U-shaped embedded shear metal damper used for energy dissipation and vibration reduction between adjacent components;

[0019] Figure 4 Schematic diagram of the core energy-consuming board;

[0020] Figure 5 Schematic diagram of U-shaped embedded part;

[0021] Figure 6 This is a schematic diagram showing the usage of a built-in U-shaped embedded shear metal damper used for energy dissipation and vibration reduction between adjacent components. Detailed Implementation

[0022] like Figures 1-6 As shown, the built-in U-shaped embedded shear metal damper for energy dissipation and vibration reduction between adjacent components includes two core energy-dissipating plates 1 and two U-shaped embedded parts 2. The core energy-dissipating plates 1 are made of LY100 low-yield steel and are I-shaped structures formed by a web 3 and flanges 4 fixed to both ends. The web 3 has a length-to-width ratio of 1:1 and two circular holes 5. The line connecting the centers of the two circular holes 5 is parallel to the long side of the flange 4. The U-shaped embedded parts 2 are made of Q235 or Q345 hard steel and are manufactured by casting-hot rolling. Two rectangular through holes 6 are provided on the vertical center line of the bottom surface of the U-shaped embedded parts 2. The two U-shaped embedded parts 2 are placed opposite each other, and the web 3... The two ends of the 3 are respectively inserted into the rectangular through holes 6 of the two U-shaped embedded parts 2. The flange plates 4 are respectively fixed to the two ends of the web plate 3. The two core energy-consuming plates 1 lock the two U-shaped embedded parts 2. The two U-shaped embedded parts 2 are respectively embedded in the adjacent component one 11 and component two 12. The core energy-consuming plate 1 is located in the gap 13 between component one 11 and component two 12. The side plate edge of the U-shaped embedded part 2 is provided with a row of wire-passing holes 7. During the process of binding the steel bars of component one 11 and component two 12, the U-shaped embedded parts 2 are bound to the steel bars by passing through the wire-passing holes 7 with thin steel wires. When pouring concrete, the two U-shaped embedded parts 2 are respectively embedded in component one 11 and component two 12.

[0023] The web 3 of the core energy dissipation plate 1 has two circular holes 5, and the line connecting their centers is parallel to the long side of the flange 4. The shear force of the core energy dissipation plate is calculated as follows:

[0024] 1) Calculation of effective shear area:

[0025] A eff= A - n - A hole

[0026] A eff is the effective shear area;

[0027] A is the non-hole shear area;

[0028] n is the number of holes;

[0029] A hole is the projected area (m 2 ) of a single hole on the shear section, which is the product of the hole diameter d and the plate thickness t, i.e. hole A = d - t.

[0030] 2) Shear force calculation:

[0031] ① Elastic stage:

[0032] V = τ - A eff

[0033] V is the core energy dissipation plate shear force;

[0034] τ is the shear stress of the core energy dissipation plate material, which needs to satisfy τ ≤ [τ] ([τ] is the allowable shear stress of the material, which can be obtained according to the material yield strength f y according to the specification, generally [τ] ≤ 0.58f y );

[0035] ② Plastic stage:

[0036] V y = τ y · A eff

[0037] V y is the core energy dissipation plate yield shear force;

[0038] τ y is the shear stress of the core energy dissipation plate material, and for commonly used metal materials such as low-carbon steel, the relationship between the shear yield strength and the tensile yield strength can be approximately taken as τ y = f y , (f y is the tensile yield strength of the material, which is obtained through the material mechanics performance test).

Claims

1. A built-in U-shaped pre-embedded shear metal damper for energy dissipation and vibration reduction between adjacent components, characterized in that, It includes two core energy-dissipating plates and two U-shaped embedded parts. The core energy-dissipating plates are I-shaped structures formed by a web and flanges fixed to both ends. The web has two round holes. The bottom surface of the U-shaped embedded parts has two rectangular through holes on the vertical center line. The two U-shaped embedded parts are placed opposite each other. The two ends of the web are respectively inserted into the rectangular through holes of the two U-shaped embedded parts. The flanges are respectively fixed to the two ends of the web. The two core energy-dissipating plates lock the two U-shaped embedded parts. The two U-shaped embedded parts are respectively embedded in two adjacent components. The core energy-dissipating plates are located in the gap between the two components. The core energy-consuming plate is made of LY100 low-yield steel; the U-shaped embedded parts are made of Q235 or Q345 hard steel and are manufactured by integrated casting and hot rolling. The side plate edge of the U-shaped embedded part is provided with a row of wire-passing holes; during the process of binding the component's reinforcing bars, the U-shaped embedded part is bound to the reinforcing bars by passing through the wire-passing holes with thin steel wires, and the U-shaped embedded part is pre-embedded in the component when pouring concrete.

2. The built-in U-shaped pre-embedded shear metal damper for energy dissipation and vibration reduction between adjacent components according to claim 1, characterized in that, The length-to-width ratio of the web is 1:

1.

3. The built-in U-shaped pre-embedded shear metal damper for energy dissipation and vibration reduction between adjacent components according to claim 1, characterized in that, The line connecting the centers of the two circular holes is parallel to the long side of the flange.

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