反复荷载下混凝土框架柱塑性铰区基于延性的抗剪承载力机理分析  

Research on mechanism of seismic shear capacity of rehlforced concrete frame columns within yield hinge regions under cyclic shear

作　　者：管品武[1] 王建强[1] 刘立新[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002

出　　处：《世界地震工程》2005年第3期75-81,共7页World Earthquake Engineering

摘　　要：在试验研究的基础上,以框架结构延性设计为目的采用桁架+拱模型研究了框架柱塑性铰区域抗剪受力机理,分析了位移延性系数、加载循环次数等因素对框架柱构件塑性铰区域剪切受力性能的影响,并结合试验结果提出了混凝土框架柱塑性铰区域剪切承载力抗震延性设计实用公式,可有效实现结构的延性破坏机制。主要为配合GBJ10-89的修订,该成果已被《混凝土结构设计规范》(GBS0010-2003)吸收。The seismic investigation shows the unavoidable shear failure of columns. For more reliable design method of ductility reinforced concrete columns the shear tests of 10 columns and analysis under cyclic load have been made. In the paper based on all of the experiment achievement the truss-arch model is adopted up to analyze the shear capacity and shear failure mechanism of columns within yield hinge region. The shear contribution of concrete and transverse reinforcement, the mechanic response of various displacement ductility factors under the cyclic load, and so on are studied by truss-arch model. A seismic shear capacity equation for ductility and non-ductility columns is proposed to account for the reduced shear contribution of concrete corresponding to the large displacement ductility levels. The columns＇limited transverse displacement within the yielding hinge region is also discussed. The seismic shear capacity equation for the columns with various ductility levels is suggested by using statistical method on the basis of test data collected from Japan and China.

关 键 词：框架柱 塑性铰区域 地震剪切抗力 箍筋抗剪贡献 混凝土抗剪贡献 位移延性系数 

分 类 号：P315[天文地球—地震学]