重庆大学学报2017，Vol.40Issue(11)：72-82,11.DOI:10.11835/j.issn.1000-582X.2017.11.009
考虑变形影响的钢筋混凝土圆柱受剪承载力计算模型
Shear strength model including the effects of deformation for the circular reinforced concrete columns
摘要
Abstract
Accurate calculation of shear strength of reinforced concrete (RC) circular columns plays a key role in the ductile seismic design,which can effectively prevent the occurrence of brittle shear and flexureshear failure.Based on the existing quasi-static test results of RC circular columns,the seismic failure modes and the method for determining the shear strength capacity of RC circular columns are analyzed.On the basis of theoretical analysis,a shear strength model of RC circular column considering the effects of inelastic deformation (displacement ductility) is proposed and compared with the existing model.The results show that the shear strength capacity of RC circular columns decreases with the increase of deformation in the plastic hinge region under seismic loading.The shear strength capacity of flexural-shear failure columns depends on the lateral load corresponding to the shear failure point of the plastic hinge region rather than peak lateral load of the skeleton curve.The proposed model is able to effectively reflect the effects of deformation on the shear strength capacity of RC circular columns.And the results are in good agreement with the experimental data and can be used to predict the shear strength capacity of RC circular columns with different failure modes under seismic excitations.关键词
钢筋混凝土圆柱/弯剪破坏/受剪承载力/位移延性Key words
reinforced concrete circular column/flexure-shear failure/shear capacity/displacement ductility分类
建筑与水利引用本文复制引用
张勤,邴鹏,韦宗延,贡金鑫..考虑变形影响的钢筋混凝土圆柱受剪承载力计算模型[J].重庆大学学报,2017,40(11):72-82,11.基金项目
国家自然科学基金资助项目(51678104,51508154) （51678104,51508154）
江苏省自然科学基金资助项目(BK20150803) （BK20150803）
中国博士后科学基金面上项目(2015M581711) （2015M581711）
国家重点实验室开放基金项目(LP1515).Supported by National Natural Science Foundation of China (51678104,51508154),the Natural Science Foundation of Jiangsu Province (BK20150803),the China Postdoctoral Science Foundation (2015M581711),and the State Key Laboratory Open Fund (LP1515). （LP1515）
