建筑钢结构进展2024，Vol.26Issue(4)：57-69,13.DOI:10.13969/j.cnki.cn31-1893.2024.04.007
侧向冲击后钢管混凝土柱剩余轴压承载力研究
Residual Axial Bearing Capacity of Concrete-Filled Steel Tubular Columns After Lateral Impact
摘要
Abstract
In order to study the residual bearing capacity of concrete-filled steel tubular(CFST)column after lateral impact,the axial compression test of CFST column after impact was carried out,and a finite element analysis model of CFST column after impact under axial compression was built.The existing test data was used to validate the accuracy of the model.The mechanical performance of typical CFST column under axial compression was analyzed.The influence of parameters such as concrete strength grade,impact mass,impact height,steel pipe strength grade,impact position,boundary condition and length-diameter ratio on the residual bearing capacity of CFST column was studied.The results show that the concrete strength grade has little effect on the residual resistance.When the concrete strength increases from C50 to C65,the residual bearing capacity only increases by 1.44％.The residual bearing capacity decreases by 10.64％when the impact mass increases from 330 kg to 630 kg.When the impact height increases from 4 m to 7 m,the residual bearing capacity decreases by 10.15％.Compared with CFST column using Q235 steel,the residual bearing capacity of CFST column with Q420 steel increases by 39.54％.When the impact position is closer to the middle of the span,the residual bearing capacity gets smaller.With the increase of the degree of freedom in the boundary conditions,the residual bearing capacity decreases.Finally,a residual bearing capacity formula of the CFST column after impact is proposed in this paper.关键词
钢管混凝土柱/有限元模拟/剩余承载力/冲击作用/轴压试验Key words
concrete-filled steel tubular(CFST)column/finite element simulation/residual bearing capacity/impact action/axial compression test分类
建筑与水利引用本文复制引用
付朝江,高颖,陈华艳,罗才松,王碧珍,林友峰,张泽群..侧向冲击后钢管混凝土柱剩余轴压承载力研究[J].建筑钢结构进展,2024,26(4):57-69,13.基金项目
福建省自然科学基金(2022J01928、2020J01885、2020J01940) （2022J01928、2020J01885、2020J01940）
