A cold-formed steel composite constrained cross-shaped energy-dissipating inner core buckling-resistant support member

Abstract

The invention discloses a cold-formed steel combination constrained cross-shaped energy-dissipating inner core anti-buckling support member, which includes a cross-shaped energy-dissipating inner core member and a peripheral cold-formed steel combined restraining member, and the number of the cross-shaped energy-dissipating inner core member is one piece The large steel plate and two small steel plates are three variable-section steel plates welded by fillet welds, and the outer cold-formed steel combination constraining members are composed of two sets of cold-formed channel steel and four sets of cold-formed channel steel The angle steel is welded into a "Tian" shape, and the cross-shaped energy-dissipating inner core member is snapped into the slots at both ends of the peripheral cold-formed steel composite restraint member. The invention has strong integrity of the cold-formed steel composite restraint member and can fully exert its working performance , The design of cold-formed angle steel can effectively ensure the development of high-order buckling of the inner core member, and the edge of the inner core member does not need to be smoothed. Reduce the inter-story displacement of the structure and meet the specification requirements.

Description

technical field [0001] The invention relates to the technical field of anti-seismic disaster prevention and mitigation of building structures, in particular to a buckling-proof support member of a cold-formed steel combined constraint cross-shaped energy-dissipating inner core. Background technique [0002] The pure frame system has limited stiffness against lateral movement, and most of them are severely damaged when encountering strong earthquakes, making the buildings unusable. In order to meet the structural interstory displacement limit under the action of horizontal load, the pure frame system increases its anti-sway stiffness by increasing the cross-sectional size of beams and columns, which is a kind of "hard resistance". It not only wastes resources, but also limits the application of pure frame system to a certain extent. As a structural system with good ductility, the frame support system is often used in earthquake-resistant structures. However, under the action...

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Problems solved by technology

[0008] The purpose of the invention is to provide a cold-formed steel combined restraint cross-shaped energy-dissipating inner core anti-buckling supporting member. The advantages of high-order buckling development of the core member and the need for smoothing the edges of the inner core member. When the structure encounters a horizontal earthquake, the cold-formed steel combination restrains the cross-shaped energy-dissipating inner core buckling-resistant brace to increase the horizontal lateral stiffness of the structure. Reduce the inter-layer displacement of the structure and meet the requirements of the code to solve the high precision requirements for the reinforced concrete or steel pipe concrete outer restraint buckling support proposed in the above background technology, the difficulty of wet construction such as concrete pouring, and the need for concrete maintenance to affect the construction progress. All-steel The externally constrained anti-buckling support requires additional processing for the energy-dissipating inner core with chamfers, and the stability and processing accuracy of the constrained members are difficult to control, etc.

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