Double-casing energy-dissipation inner-core buckling restrained brace member with double yield points

Abstract

A double-casing energy-dissipation inner-core buckling restrained brace member with double yield points comprises a low yield-point steel plate of a casing-shape energy-dissipation inner core plate, a high yield-point steel plate of the casing-shape energy-dissipation inner core plate, an external constraint steel plate, an end connecting plate and cement mortar. The problem that according to an existing buckling restrained brace, energy dissipation can be yielded by relying on single material only, the energy dissipation effect cannot be guaranteed during ultra-expected great earthquakes or huge earthquakes are aimed to be solved, and the novel energy dissipation core made by overlapping the low yield-point steel plate and high yield-point steel plate of the energy-dissipation inner core plate is provided. The mechanical characteristic of the low yield point is prone to yielding, and the fine hysteretic characteristic is provided with during shaping, a large amount of energy is absorbed in the process of elastic-plastic hysteretic deformation, the internal force of the rest part of the structure is significantly reduced, and the structure is protected accordingly; the yield point of high-yield-point steel is higher than that of low-yield-point steel, and elasticity can be retained when the low-yield-point steel is yielded.

Description

technical field [0001] The invention belongs to the technical field of anti-buckling energy-dissipating support members, and relates to a novel anti-seismic energy-dissipating support member for engineering structures, in particular to an anti-buckling support member with double yield points. Background technique [0002] In recent years, earthquakes have occurred frequently all over the world, and there have been giant earthquakes beyond the fortification level, which represent extreme seismic loads that exceed the magnitude characteristics of large earthquakes. In order to realize the safety of structures under the action of huge earthquakes, it is of great significance to introduce anti-seismic measures in the case of unexpected large earthquakes into the traditional design concept. Anti-buckling braces were first successfully developed by Japanese scholars, and tension and compression tests were carried out on them; after the Northridge earthquake, the United States bega...

AI Technical Summary

Problems solved by technology

Aiming at the problem that the existing anti-buckling bracing only relies on the yield and energy dissipation of the energy-dissipating inner core plate of a single material, its energy dissipation effect cannot be guaranteed in the face of unexpected large earthquakes or even huge earthquakes. A new type of energy-dissipating core made of overlapping steel plates and high-yield-point steel plates

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