佛山科学技术学院学报（自然科学版）2025，Vol.43Issue(1)：62-69,8.
火灾后设置加劲钢筋的十字形薄壁钢管混凝土短柱轴压机理
Axial compression mechanism of cross-shaped thin-walled concrete-filled steel tube(CFST)short columns with stiffened steel bars after fire
摘要
Abstract
In this paper,ABAQUS is used to establish the finite element model of cross-shaped thin-walled concrete-filled steel tube after fire.On the basis of model verification,the synergistic mechanism of steel tube and core concrete,the distribution law of normal contact force between steel tube and core concrete,and the distribution law of longitudinal stress of core concrete are studied.It can be seen that the compression process of the short column was divided into elastic stage,elastoplastic stage,hardening stage or softening stage.The proportion of load borne by steel tube increased with heating time.The interaction between steel tube and concrete decreased with the increase of heating time,width-thickness ratio and steel bar's spacing.关键词
火灾后/十字形截面/薄壁钢管混凝土/加劲钢筋/轴压机理Key words
after fire/cross section/thin-walled concrete-filled steel tube/stiffened steel bars/axial compression mechanism分类
建筑与水利引用本文复制引用
王微微,刘鑫,郑君,张琳,吕学涛..火灾后设置加劲钢筋的十字形薄壁钢管混凝土短柱轴压机理[J].佛山科学技术学院学报（自然科学版）,2025,43(1):62-69,8.基金项目
国家自然科学青年基金项目(51208246) （51208246）
广东省教育厅普通高校特色创新项目(2023KTSCX218) （2023KTSCX218）
广东省教育厅普通高校创新团队项目(2024KCXTD068) （2024KCXTD068）
