建筑结构学报2013，Vol.34Issue(8)：12-19,8.
高温后钢筋混凝土短柱抗震性能试验研究
Experimental study on seismic performance of reinforced concrete short columns after fire
摘要
Abstract
Based on the quasi-static tests of seven reinforced concrete (RC) short columns after fire and one contrastive specimen at ambient temperature,the effects of fire exposure time,axial load ratio and shear span ratio on the failure mode,shear strength,skeleton curve,stiffness degradation,ductility ratio and hysteretic energy were analyzed.The average reduction coefficient of compressive strength in concrete sections was calculated by a finite element program,and a practical calculation method for the shear strength of RC columns after exposure to fire on all sides was proposed.The results show that:the shear strength of short columns decreases with the increase of fire exposure time and shear span ratio.The difference of influence degree of shear span ratio on the shear strength of columns before and after fire is small.With an increase of axial load ratio,the shear strength of short column after fire firstly is increased and then decreasing.The critical value of the influence of axial load ratio on the shear strength of columns after fire is less than that at ambient temperature.The proposed formula for the residual shear capacity of RC columns after fire has certain safety margin ratio,and can be used to assess the shear performance of that member after fire.关键词
钢筋混凝土短柱/高温试验/拟静力试验/抗震性能/高温后受剪承载力Key words
reinforced concrete short column/ fire test/ quasi-static test/ seismic behavior/ shear strength after fire分类
建筑与水利引用本文复制引用
徐玉野,杨清文,吴波,徐明..高温后钢筋混凝土短柱抗震性能试验研究[J].建筑结构学报,2013,34(8):12-19,8.基金项目
国家自然科学基金项目(50908091),国家重点基础研究发展计划(973计划)项目(2011CB013800),福建省自然科学基金项目(2012J01221),福建省高等学校杰出青年科研人才培育计划项目(JA10005). （50908091）
