Double-rectangular tube buckled assembled buckling-restrained bracing member

Abstract

The invention discloses a double-rectangular tube buckled assembled buckling-restrained bracing member and belongs to the field of structural engineering. The bracing member consists of a linear inner core member and a peripheral restraining member, wherein the linear inner core member adopts a low-yield point high-ductility flat steel plate and hard rubber is adhered to the surface of the surface of the linear inner core member; the peripheral restraining member is bound by two restrained square steel tubes with extended steel plate strips; the binding function is realized by performing high-strength bolted connection on the square steel tubes; and a high-strength bolt passes through bolt holes on the extended steel plate strips of the square steel tubes, a steel plate arranged between the square steel tubes and a plurality of rubber gaskets so as to connect the two square steel tubes into a whole. The thickness of the steel plate is greater than that of the linear inner core member, and by adjusting the thickness of the rubber gaskets, a gap of 1-2mm is kept between the surface of the peripheral restraining member and the surface of the linear inner core member under the pretightening force of the high-strength bolt. The gap is filled by the hard rubber adhered to the surface of the linear inner core member so as to meet the requirement of expanding under pressure on the linear inner core member.

Description

technical field [0001] The invention relates to a novel anti-buckling support member, which belongs to the technical field of structural engineering. technical background [0002] Buckling-resistant bracing members are generally composed of two parts: the inner core member and the outer restraint member. After the Northridge Earthquake in the United States in 1994 and the Kobe Earthquake in Japan in 1995, engineers began to realize that buckling-resistant bracing members had an excellent effect on energy dissipation and shock absorption, and they began to be used in a large number of engineering projects in Japan and the United States. So far, there are more than 300 buildings in Japan and no less than 30 buildings in the United States that have been built or are under construction using buckling-resistant bracing systems. [0003] At present, the cross-section types of buckling-resistant bracing members can be divided into three categories according to the peripheral restr...

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Problems solved by technology

[0004] The commonly used reinforced concrete peripheral constrained section and steel and concrete composite peripheral constrained section mainly have the following disadvantages: (1) The manufacturing precision of such components is high, resulting in increased manufacturing costs, especially when pouring concrete, no matter what kind of delicate Formwork materials and support methods are difficult to guarantee the reserved accuracy requirements between the inner core and the periphery; (2) wet operations such as pouring concrete have affected the production and construction, and its accuracy control is difficult; (3) the coating is in The isolation material on the surface of the core component is mostly epoxy resin, which has a single variety, and its durability is poor, and it is easy to detach from the surface of the core

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