建筑钢结构进展2025，Vol.27Issue(10)：69-78,10.DOI:10.13969/j.jzgjgjz.20240512002
螺栓连接方钢管混凝土柱-钢梁组合框架结构拟静力有限元分析
Quasi Static Finite Element Analysis of Concrete-Filled Square Steel Tubular Column-Steel Beam Composite Frame Structure with Bolt Connections
摘要
Abstract
ABAQUS software was used to build a refined 3D solid finite element(FE)model and perform quasi static analysis of a 1-story,1-span bolt connected square concrete-filled steel tubular(CFT)column-steel beam frame structure.Solid modeling was used for small components such as screws and nuts.The model fully considers the confinement effect of the steel tube on the core concrete,the preload effect of screw and nut,and the frictional contact effect between bolts and T-shaped plate,steel tube and steel beam.The numerical results including failure mode,load-displacement hysteretic curve,stiffness degradation-displacement curve show good agreement with the existing quasi static experimental results.Based on this,further analysis was conducted on macro indicators such as slip of the bolt,axial compression ratio of column,lateral deformation index of steel tube and micro indicators such as stress-strain of core concrete,structural damage,plastic energy dissipation distribution mechanism.The results show that the slip of the bolt and the axial compression of the column are both very small.The lateral deformation index of the control points at the bottom of the steel tube exceeds 0.5,and the maximum compressive stress of the core concrete exceeds the uniaxial compressive strength.At this time,the steel tube exerts a confinement effect on the core concrete.The concrete at the bottom of the column is more prone to cracking and crushing than that at the beam column joints.This composite frame structure is dominated by beam energy dissipation and supplemented by column energy consumption,which is a typical"strong column weak beam"structural system.The bolt solid modeling method has the advantages of high calculation accuracy and solving efficiency and can effectively reflect the failure characteristics of the frame structure,so it can be conveniently used to simulate actual bolt connected composite frame structures.关键词
钢-混凝土组合框架/螺栓连接/拟静力分析/约束作用/塑性耗能分配机制/结构损伤/强柱弱梁Key words
steel-concrete composite frame/bolted connection/quasi static aualysis/confinement effect/plastic energy dissipation distribution mechanism/structural damage/strong column and weak beam分类
建筑与水利引用本文复制引用
罗靓,晏宇翔,吕辉,邵炼..螺栓连接方钢管混凝土柱-钢梁组合框架结构拟静力有限元分析[J].建筑钢结构进展,2025,27(10):69-78,10.基金项目
国家自然科学基金(52268031),江西省智慧建筑工程研究中心开放基金(EZ202311419),河南省科技攻关项目(252102240019) （52268031）
