Novel steel-tube reinforced concrete-filled steel tubular member and processing method thereof

Abstract

The invention discloses a novel steel-tube reinforced concrete-filled steel tubular member and a processing method thereof. The novel steel-tube reinforced concrete-filled steel tubular member is composed of an external steel tube and a core concrete-filled steel tubular member. The external steel tube only provides a lateral restraint effect on the core concrete-filled steel tubular member. The external steel tube and the core concrete-filled steel tubular member are all circular and tightly fit with each other. The external steel tube is arranged along the length direction of the surface of the core concrete-filled steel tubular member but not connected with ends of the core member and beam-column joints. Co-working performance between the core member steel-tube and core concrete can be enhanced, carrying capacity and ductility of the member are increased, failure mode of the member is improved, and shock resistance and corrosion resistance of the member are raised. The invention has advantages of clear principle, excellent mechanical properties and low engineering cost.

Description

technical field [0001] The invention belongs to the field of building structural components, and in particular relates to a new steel tube concrete component constrained by steel tubes and a processing method thereof. Background technique [0002] Concrete filled steel pipe refers to a composite member formed by filling concrete in steel pipes. During the stress process of concrete-filled steel tube members, the confinement effect of the steel tube on the concrete makes the concrete in a stress state of three-dimensional compression, so that the strength of the core concrete in the steel tube can be improved, and the ductility can be significantly improved; at the same time, the existence of the core concrete can avoid Or delay the local buckling of the steel pipe, so as to ensure that its material properties can be fully utilized. Compared with reinforced concrete structures, during the construction of concrete filled steel pipes, steel pipes can be used as formwork for po...

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a new type of concrete-filled steel tube member constrained by steel pipes, aiming to solve the deficiencies of the existing concrete-filled steel tube member technology, to enhance the co-working performance between the core member steel pipe and the core concrete, and to improve the bearing capacity and strength of the member. Ductility, improving the failure mode of components, enhancing the seismic and corrosion resistance of components

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