建筑钢结构进展2024，Vol.26Issue(6)：94-104,11.DOI:10.13969/j.cnki.cn31-1893.2024.06.010
圆形钢管混凝土柱轴压承载力及承载力组成研究
Axial Compressive Bearing Capacity and Its Composition of Circular Concrete-Filled Steel Tubular Columns
摘要
Abstract
A novel constitutive model for concrete material was incorporated into the VUMAT subroutine of ABAQUS to investigate the respective bearing capacity contributions of the steel tube and concrete in circular concrete-filled steel tubular(CCFST)columns under interaction.A three-dimensional finite element model was established to reflect the interaction between the steel tube and concrete in CCFST columns,and the model was validated against experimental data for load-displacement curves,load-deformation curves of the steel tube and concrete,and lateral deformation curves.Based on the established models,the influence of concrete strength,steel yield strength,diameter-to-thickness ratio,and confinement coefficient on the bearing capacity and its composition of CCFST columns was analyzed.Subsequently,a mathematical model for the peak bearing capacity of CCFST columns under axial compressive load was derived using the finite element models.To evaluate the stress state of the steel tube and concrete,the proposed proportional coefficient of circumferential stress in the steel tube and the contribution coefficient of concrete strength were introduced.The proposed formula was compared to current specifications and existing research to verify its accuracy and capability to evaluate the bearing capacity contributions of the steel tube and concrete.关键词
圆形钢管混凝土柱/相互作用/约束作用/有限元法/轴压承载力Key words
circular concrete-filled steel tube(CFST)column/interaction/confinement effect/finite element method/axial compressive bearing capacity分类
建筑与水利引用本文复制引用
陈立康,黄远..圆形钢管混凝土柱轴压承载力及承载力组成研究[J].建筑钢结构进展,2024,26(6):94-104,11.基金项目
湖南省自然科学基金(2020JJ2003) （2020JJ2003）
