湖南大学学报（自然科学版）Issue(9)：42-51,10.
圆钢管混凝土短柱的火灾后剩余承载力研究∗
Research on the Residual Strength of Concrete-filled Circular Steel Tube Stub Columns after Exposure to Fire
摘要
Abstract
On the basis of the proposed stress-strain relationships of steel and concrete of concrete-filled circular steel tubes (CFCST)at each stage of fire exposure,fully coupled thermal-stress analysis model in finite element soft ABAQUS was developed to predict the load-deformation relationship curves of axially loaded CFCST stub columns after exposure to ISO-834 standard fire.The predicted results were in good agreement with test results.The finite element analysis model was then used to investigate the behavior of CFCST stub columns by examining the load-deformation relationship,the cross-sectional stress distribu-tions of steel tube and concrete core and their interaction during the entire stage of fire exposure.Paramet-ric analysis was conducted to investigate the influence of heating time,initial axial,steel ratio,steel yield strength,concrete cube strength,spray insulation thickness and sectional size on the residual strength of axially loaded CFCST stub columns.Finally,a set of formulas was proposed to predict the residual strength of axially loaded CFCST stub columns after exposure to fire.关键词
钢管混凝土/短柱/火灾全过程/剩余承载力/有限元分析/简化计算Key words
concrete-filled steel tube/stub columns/full range fire/residual strength/finite element analysis/simplified calculation分类
建筑与水利引用本文复制引用
李毅,王志滨..圆钢管混凝土短柱的火灾后剩余承载力研究∗[J].湖南大学学报（自然科学版）,2015,(9):42-51,10.基金项目
国家自然科学基金资助项目(51308124),National Natural Science Foundation of China(51308124) （51308124）
