Circular steel pipe concrete member constrained by steel pipe and provided with interlayer and machining method thereof

Abstract

The invention discloses a circular steel pipe concrete member constrained by a steel pipe and provided with an interlayer and a machining method thereof. The novel circular steel pipe concrete member constrained by the steel pipe and provided with the interlayer is composed of the outer steel pipe, an interlayer material and a core steel pipe concrete member, and the outer steel pipe and the interlayer material only provide lateral constraint for the core steel pipe concrete; both of the outer steel pipe and the core steel pipe concrete member are circular; and the outer steel pipe is arranged along full length of the surface of the core steel pipe concrete member and not connected with the end of the core member and a beam column joint. According to the circular steel pipe concrete member constrained by the steel pipe and provided with the interlayer and the machining method thereof, co-working performance of the core member steel pipe and core concrete can be strengthened, the bearing capacity and ductility of the member can be improved, the failure mode of the member can be improved, and the seismic resistance, corrosion resistance and fire resistance of the member can be reinforced; and according to the circular steel pipe concrete member constrained by the steel pipe and provided with the interlayer and the machining method thereof, the principle is clear, mechanical performance is excellent and engineering cost is low.

Description

technical field [0001] The invention belongs to the field of building structural components, and in particular relates to a circular steel tube concrete component constrained by interlayer steel pipes 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...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a circular steel tube concrete member with interlayer restraint, aiming to solve the deficiencies of existing steel tube concrete member technology, to enhance the joint work performance between the core member steel pipe and the core concrete, and to improve the structural strength of the member. Bearing capacity and ductility, improve the failure mode of components, and enhance the seismic, corrosion and fire resistance of components

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