Self-resetting reinforced concrete shear wall based on viscoelastic energy consumption

Abstract

The invention discloses a self-resetting reinforced concrete shear wall based on viscoelastic energy consumption. The shear wall comprises a reinforced concrete shear wall body and self-resetting energy dissipation devices, and the self-resetting energy dissipation devices are symmetrically arranged on the two sides of a wall foot of the reinforced concrete shear wall body. The self-resetting energy consumption device comprises an inner pipe and an outer pipe which are coaxially arranged, the inner pipe can axially reciprocate in the outer pipe, the lower part of the outer pipe is expanded, an upper baffle plate and a lower baffle plate which are respectively sleeved on the inner pipe are arranged in the expanded area, and a pre-pressing disc spring is arranged between the upper baffle plate and the lower baffle plate. An inner welding plate is arranged on the surface of the outer wall of the inner pipe above the expanded area, and a viscous-elastic material is arranged between the inner welding plate and the outer pipe. The upper end of the inner pipe is connected with the upper end plate. The self-resetting energy dissipation device is simple in structure, low in manufacturing cost and convenient to install and machine, the self-resetting energy dissipation device can give full play to the characteristics of the disc spring and the viscoelastic material, the self-resetting energy dissipation device has good self-resetting capacity and energy dissipation capacity, residual deformation of a wall body after an earthquake can be effectively reduced, and the anti-seismic property of the reinforced concrete shear wall is improved.

Description

technical field [0001] The invention relates to the technical field of seismic isolation and shock absorption of building structures, in particular to a self-resetting reinforced concrete shear wall based on viscoelastic energy dissipation. Background technique [0002] The reinforced concrete shear wall is the main anti-lateral force component in the building structure, which can provide large anti-lateral stiffness and can bear large vertical and horizontal loads. Under the action of earthquake, a plastic hinge area is formed at the bottom of the shear wall to dissipate Energy, the concrete at the foot of the wall was crushed and badly damaged. A large number of earthquake damage analyzes show that due to the complexity and uncertainty of earthquake action, shear wall structures may suffer from earthquakes with greater intensity than fortifications, and the damage of shear walls is mainly concentrated in the plastic hinge area at the bottom. It is often difficult to repai...

AI Technical Summary

Problems solved by technology

[0003] At present, self-resetting energy-dissipating shear walls mostly use post-tensioned unbonded prestressed steel bars, shape-memory alloy wires, and additional frictional energy-dissipating elements to provide sufficient restoring force and energy-dissipating capacity for the shear walls, but the prestressed steel bars The deformation capacity is limited, the application of prestress is greatly affected by the construction quality, and the reliability of the anchorage is strongly dependent. Once the anchorage is broken, the prestressed steel bars will fail, so that the self-resetting ability of the structure cannot be realized

Although the shape memory alloy wire has good reset performance and certain energy dissipation capacity, it needs to be heated to return to the state before deformation after deformation, and its performance is greatly affected by temperature.

However, under constant positive pressure, long-term static contact of frictional energy-dissipating elements will cause cold bonding or cold solidification, resulting in changes in the friction coefficient and reducing the energy dissipation capacity of the shear wall.

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