Buckling-resistant supporting element bound by four square pipes

Abstract

The invention provides a buckling-resistant supporting element bound by four square pipes, belonging to the field of structural engineering. The supporting element consists of a cross-shaped internal core element and an external binding component. The cross-shaped internal core element is welded by three flat steel plates, and the surface of the cross-shaped internal core element is glued with hard rubber. The external binding component is bound by four square pipes with a plurality of extending steel plate bands, wherein each square pipe is oppositely welded by two equal angle irons with different sizes or four flat steel plates, and each square pipes is hollow or poured with the concrete. The binding effects among the square pipes are realized by the means that the extending steel platebands are connected with each other by a plurality of high-strength bolts. The high-strength bolts are penetrated through the extending steel plate bands and a plurality of steel cushion plates and rubber spacers which are arranged among the extending steel plate bands, so that the four square pipes are connected with each other into a whole body. Meanwhile, a gap with 1mm-2mm is kept between thesurface of the external binding component and the surface of the cross-shaped internal core element, and the gap is filled with the hard rubber which is glued at the surface of the cross-shaped internal core element, thereby meeting the requirement that the cross-shaped internal core element is pressed to be inflated.

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] At present, the cross-section types of buckling-resistant bracing members can be divided into three categories according to the peripheral restraint materials and combinations, namely, reinforced concrete peripheral restraint cross-sections, steel and concrete composite peripheral restraint cross-sections (generally steel pipes are externally placed, concrete is built-in and between concrete and the inner core Separation by release agent), all-steel fabricated peripheral restraint section. The material of the compression core member is steel and has sufficient ductility requirements. Currently, the commonly used core cross-section forms are "one" shape and "ten" shape. Generally, a special non-bonded material is coated on the surface of the inner core member, and a certain gap is reserved between ...

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Problems solved by technology

The existing problems of adopting reinforced concrete peripheral constrained section and adopting steel and concrete combined peripheral constrained section are as follows: (1) High manufacturing precision is required, which leads to increased manufacturing cost, especially when pouring concrete, no matter what kind of exquisite formwork material and It is difficult to ensure 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 the difficulty of precision control has increased; (3) Coating on the inner core components The isolation material on the surface mostly adopts epoxy resin, which has a single variety, its durability is poor, and it is easy to detach from the surface of the inner core

The author has also proposed an all-steel fabricated anti-buckling support member [200910081817.5], which uses four channel-shaped hot-rolled steel sections to bind a "one"-shaped inner core member. However, due to the small area of ​​the inner core member, the yield The load is limited, and it cannot meet the requirements of cross-section types and super large support force that are increasingly needed in engineering

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