Anti-buckling low yield point steel-composite energy dissipation brace

Abstract

The invention discloses an anti-buckling low yield point steel-composite energy dissipation brace, comprising an inner core stress unit which is integrally sealed and coated by a peripheral composite constraint unit, wherein the inner core stress unit is a low yield point steel kernel steel core; the peripheral composite constraint unit is formed by a ribbed glass fiber reinforced polymer (GFRP) pipe, and contoured foams in the pipe; GFRP rib plates inside the pipe are evenly distributed; the kernel steel core and the peripheral composite constraint unit are integrally molded at one time in a vacuum importing manner; screw holes are formed in connecting parts at two ends of the kernel steel core; GFRP stiffening ribs vertical to the kernel steel core are respectively arranged at two ends of the kernel steel core. According to the anti-buckling low yield point steel-composite energy dissipation brace, the GFRP rib plates directly contact the inner core stress unit of the brace; external energy dissipated by the inner core stress unit is constrained by a composite, so that the brace is free of buckling; the carrying capacity of the brace is improved. The brace is integrally molded once in the vacuum importing manner, is corrosion-resistant, low in full-life maintenance cost, light in weight, high in strength, convenient to transport, install and construct, strong in designability, convenient to mold, and quick to produce in batch, and can be flexibly designed according to the requirements.

Description

technical field [0001] The invention relates to an energy dissipation support of a building structure, in particular to a buckling-free low yield point steel-composite material energy dissipation support. Background technique [0002] Ordinary supports will buckle under compression. When the supports buckle under compression, the stiffness and bearing capacity will decrease sharply. Under the action of earthquake or wind, the internal force of the support changes back and forth under the two states of compression and tension, so the hysteretic performance of ordinary supports is poor under repeated loads. [0003] The existing buckling-constrained brace mainly consists of three parts: inner core stress unit (core material), unbonded expandable material, and buckling-constrained unit. It can be mainly divided into two types: one is a hybrid buckling-restrained brace with reinforced concrete or steel tube concrete as the restraining member and steel as the inner core member; ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned deficiencies in the prior art, and make full use of GFRP's light weight, high strength, lower elastic modulus than steel, and corrosion resistance, the present invention proposes a buckling-free low yield point steel-composite material energy dissipation support. The periphery of the steel with low yield point is sealed and wrapped with composite material GFRP, aiming to solve the problem of poor buckling and hysteresis performance of ordinary supports

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