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2005•Journal of the China Railway SocietyRequires access

Nonlinear Finite Element Analysis of Concrete Filled Steel Tubular (Single Tube) Arch Subjected to Spatial Loads

Lin Jia-yang

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Abstract

A method to analyze the dual nonlinearity behaviors of CFST(single tube) arch subjected to spatial loads is presented.Spatial beam element is used in the finite element model.The fiber element model is used for the normal stress-strain relation and the standard curve in the unify theory of CFST is used for the shear stress-strain relation.The analyses of the nonlinear property of the CFST model arches both with a single rib and two ribs indicate that the method proposed herein can get out the basic mechanic behaviors of the steel tubular CFST arch subjected to spatial loads on the whole loading progress.Under the spatial loads,the affection of the geometric nonlinearity to the behaviors of CFST arch is more seriously than the material nonlinearity.The spatial actions of the CFST arch with single rib is obviously great than that with double ribs.

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What this paper is about

A method to analyze the dual nonlinearity behaviors of CFST(single tube) arch subjected to spatial loads is presented.Spatial beam element is used in the finite element model.The fiber element model is used for the normal stress-strain relation and the standard curve in the unify theory of CFST is used for the shear stress-strain relation.The analyses of the nonlinear property of the CFST model arches both with a single rib and two ribs indicate that the method proposed herein can get out the basic mechanic behaviors of the steel tubular CFST arch subjected to spatial loads on the whole loading progress.Under the spatial loads,the affection of the geometric nonlinearity to the behaviors of CFST arch is more seriously than the material nonlinearity.The spatial actions of the CFST arch with single rib is obviously great than that with double ribs.

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Available abstract

A method to analyze the dual nonlinearity behaviors of CFST(single tube) arch subjected to spatial loads is presented.Spatial beam element is used in the finite element model.The fiber element model is used for the normal stress-strain relation and the standard curve in the unify theory of CFST is used for the shear stress-strain relation.The analyses of the nonlinear property of the CFST model arches both with a single rib and two ribs indicate that the method proposed herein can get out the basic mechanic behaviors of the steel tubular CFST arch subjected to spatial loads on the whole loading progress.Under the spatial loads,the affection of the geometric nonlinearity to the behaviors of CFST arch is more seriously than the material nonlinearity.The spatial actions of the CFST arch with single rib is obviously great than that with double ribs.

Key concepts: Arch, Structural engineering, Finite element method, Nonlinear system, Engineering, Stress–strain curve, Stress (linguistics), Physics

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