Original scientific paper
A novel sectional constitutive model for beam-column element
Chen Yongsheng
; Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, ChinaSchool 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, ChinaSchool 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, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
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.
Keywords
constitutive model; yield surface; axial force and bending moment coupling; mixed hardening; elastoplastic analysis
Hrčak ID:
151840
URI
Publication date:
27.1.2016.
Visits: 1.430 *