防灾减灾工程学报2017，Vol.37Issue(3)：405-413,9.DOI:10.13409/j.cnki.jdpme.2017.03.011
考虑梁端约束CFST柱-RC梁节点耐火性能研究
Fire Performance of CFST Column to RC Beam Joints with Beam Ends Constrained
摘要
Abstract
A finite element analysis (FEA) model was developed for sequentially coupled heat transfer and mechanical analysis of concrete filled steel tube (CFST) column to reinforced concrete (RC) beam joints under fire,which was validated by the experimental results available in the literature.The FEA model was then used to investigate the influence of material parameters,geometric parameters,load parameters and the constrained stiffness at beam ends on the fire resistance of CFST column to RC beam joints,and particularly the effect of axial and rotational constrained stiffness at beam ends on the moment versus rotation angle relationship,rotational stiffness and distribution of sectional inner forces of CFST column to RC beam joints in fire.The results show that CFST column to RC beam joints have two kinds of failure model:column failure and beam-slab failure.The constraint at beam ends has little influence on the fire resistance of CFST column to RC beam joints;however,the axial constraint has a significant impact on the moment versus rotation angle relationship,rotational stiffness and distribution of sectional inner forces of the composite joints in fire.关键词
钢管混凝土(CFST)柱/钢筋混凝土(RC)梁/节点/耐火性能/有限元分析Key words
concrete filled steel tubular (CFST) column/reinforced concrete (RC) beam/joint/fire performance/finite element analysis分类
建筑与水利引用本文复制引用
王丹丹,杨有福..考虑梁端约束CFST柱-RC梁节点耐火性能研究[J].防灾减灾工程学报,2017,37(3):405-413,9.基金项目
国家自然科学基金项目(50908034,51421064)资助 （50908034,51421064）
