钢筋混凝土圆柱考虑位移延性的受剪承载力研究

英文篇名：Seismic shear strength of RC circular columns considering the influence of flexural ductility
中文刊名：土木工程学报
英文刊名：China Civil Engineering Journal
作者：顾冬生 ; 吴刚 ; 吴智深 ; 魏洋
英文作者：Gu Dongsheng1 ; 2 Wu Gang3 Wu Zhishen3 Wei Yang3 (1.Jiangsu Province Key Laboratory of Structure Engineering ; Suzhou 215011 ; China ; 2.Jiangnan University ; Wuxi 214122 ; China ; 3.Key Laboratory of Concrete and Pre-stressed Concrete Structures of the Ministry of Education Southeast University ; Nanjing 210096 ; China)
中文关键词：RC圆柱 ; 受剪承载力 ; 侧向位移 ; 延性
英文关键词：RC circular columns ; shear strength ; lateral displacement ; ductility
出版日期：2010-11-15
机构：苏州科技学院省结构工程重点实验室;江南大学;东南大学混凝土及预应力混凝土结构教育部重点实验室;
年：2010
期：S1
出版单位：土木工程学报

摘要

现有的试验结果表明,钢筋混凝土(RC)柱受剪承载力在位移延性系数大于2后随着侧向位移的增加会逐渐下降。为了确保RC柱发生延性较好的弯曲破坏,在地震作用下柱子承受的侧向荷载要小于柱子受剪承载力的最终值。通过31个在模拟地震作用下发生剪切破坏的大比例圆柱试验结果对现有受剪承载力计算模型精度进行讨论,发现规范公式的计算结果普遍偏于保守,Priestly提出的公式考虑了位移延性系数的影响,具有较高的精度。计算结果还发现,我国规范公式计算结果和Priestly公式计算的受剪承载力最终值比较接近,可以用来计算受剪承载力最终值。
The experimental results indicate that the shear strength of reinforced concrete(RC) columns reduced with the increase of flexural ductility for displacement ductility factors in excess of 2.In order to have good ductility,the shear force generated during earthquakes should be less than the final shear strength of RC columns.Exiting design expressions for shear strength of circular columns are discussed and compared with the results of 31 circular columns tested under simulated seismic loading.It is shown that existing code design equations are very conservative for shear strength,however,the model proposed by Priestly,which can consider the influence of the flexural ductility on shear strength,has good precision.It is also found that the calculated results from China design code equations compares well with the final shear strength from Priestly model,and both can be used to calculate the final shear strength of RC columns.

引文

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