华东交通大学学报Issue(4)：24-29,6.
方中空夹层钢管混凝土压弯扭构件数值模拟
Numerical Simulation of Concrete-filled Double Skin Steel Tube under Compression-Bending-Torsion Loading
摘要
Abstract
Finite element method is adopted to analyze mechanism of the concrete-filled double skin steel tube (CFDST)and concrete-filled steel tube(CFST)members. The outer steel tube of CFDST and CFST members is square hollow section(SHS),and the inner steel tube of CFDST member is circular hollow section(CHS). This study finds that the ultimate bearing capacity of CFDST under combined compression-bending-torsion load is in accordance with CFST,but the ductility of the CFDST is better. The interaction between steel and con-crete in the corner is the largest in the cross section. The longitudinal loads born by steel tubes and concrete of CFDST and CFST versus longitudinal strain relationship curves are substantially the same. The torque born by steel tubes of CFDST is more than that of CFST,and the torque borne by sandwiched concrete of CFDST is less than that borne by core concrete of CFST. The concrete bears 26%~33%torque of the member due to the con-straint of steel tubes and prevents the buckling of steel tubes.关键词
中空夹层钢管混凝土/实心钢管混凝土/压弯扭/有限元Key words
CFDST/CFST/compression-bending-torsion/finite element分类
建筑与水利引用本文复制引用
黄宏,李婷,陈梦成..方中空夹层钢管混凝土压弯扭构件数值模拟[J].华东交通大学学报,2013,(4):24-29,6.基金项目
国家自然科学基金项目(51008122)；973计划前期研究专项(2011CB612210)；江西省教育厅科技计划落地项目；江西省自然科学基金项目(20122BAB206006) （51008122）
