（西安建筑科技大学土木工程学院, 西安 710055）

［摘要］以梁柱组合件为研究对象，分析了由于梁纵筋屈服应变向节点区扩展而引起的节点附加应变，计算了节点区混凝土的主拉应变，并依据主拉应变确定了节点区混凝土抗压强度折减系数。在此基础上，采用斜压杆-桁架模型，建立了考虑节点变形的梁柱节点受剪承载力计算模型，模型计算结果与试验结果较为吻合。

［关键词］RC梁柱节点; 节点变形; 受剪承载力; 应变扩展

中图分类号：TU375.4      文献标识码：A      文章编号：1002-848X(2014)11-0086-04

A calculation model for shear bearing capacity of beam-column joints considering joint deformation

Wang Hai, Liang Xingwen, Wang Yingjun

 (School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)

Abstract: Taking the beam-column composite member as the research object, the joint additional strain, which is induced by the yield strain of longitudinal reinforcement of the beam expanding to the joint region, was analyzed. The primary tensile strain of the concrete in the joint region was calculated and the reduction coefficient of concrete compression strength in the joint region based on this calculation was determined. On this basis, the model of arch-truss was used to establish the calculation model for the shear bearing capacity of the beam-column joint considering the joint shear deformation. The calculation results agree well with the experimental results.

Keywords: reinforced concrete beam-column joint; joint deformation; shear bearing capacity; strain extension

*国家自然科学基金项目（51278402，51078305）。

作者简介：王海，硕士研究生，Email:ronwanghai@gmail.com。

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