A novel sectional constitutive model for beam-column element

Authors

  • Chen Yongsheng Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
  • Wu Bin Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
  • Pan Tianlin Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Keywords:

constitutive model, yield surface, axial force and bending moment coupling, mixed hardening, elastoplastic analysis

Abstract

The constitutive models on sectional level can meet both computational accuracy and efficiency, and hence have great potential for nonlinear analyses of frame structures. However, currently available sectional constitutive models usually assume a constant axial force and therefore cannot account for axial force and bending moment coupling flexibly. In this paper, a sectional constitutive model is proposed in the framework of classical plastic theory. The proposed model features kinematic/isotropic hardening. It can well account for axial flexure interaction, and can be used to describe distributed plasticity along beam-column members in comparison with a plastic hinge model. The numerical simulations of a cantilever column and a steel frame structure showed that the proposed sectional constitutive model is more accurate than a plastic hinge model and more efficient than a fiber model.

Author Biographies

Chen Yongsheng, Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Wu Bin, Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Professor

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Published

2016-01-27

Issue

Engineering Review, Vol. 36, No. 1

Section

Articles

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