Abstract

Info

Title:: Nonlinear Analysis of RC Structure Based on Space Equivalent Truss Element Method

Author(s):: WU Fang-bo; XIONG Jiang-ling; LI Jun; YUE Jian-wu; ZHOU Xu-hong; School of Civil Engineering, Hunan University

Keywords:: space equivalent truss element; finite element method; stiffness equivalence; RC structure; nonlinear analysis

Abstract:: In order to deal with complexity of traditional finite element analysis and inaccurate description of cracks, a kind of space equivalent truss element was proposed based on space stress element and plane equivalent truss element method. Based on the principle of stiffness equivalence for space equivalent truss element and space stress element, the equivalent element stiffness matrix, the equivalent sectional area of member bar and the formula of axial force were derived. The problems related to space equivalent truss element used in nonlinear analysis of reinforced concrete (RC) structure were discussed. A bridge pier structure was analyzed by space equivalent truss element with ANSYS 10.0, and the analysis results were compared with the results of plane equivalent truss element and test. The results show that the method proposed is feasible to analyze RC structure, can satisfy the requirements of engineering precision and accurately describe the crack development.