施工缺陷对RC框架梁柱节点受力性能的影响  

Influence of construction defect on stress performance of RC framed beam-column joint

作　　者：王亚楠[1] 李志扬 胡新煜 杨若庸[1] 杜永峰[3] WANG Ya-nan;LI Zhi-yang;HU Xin-yu;YANG Ruo-yong;DU Yong-feng(School of Civil Engineering,Xi’an Technological University,Xi’an 710021,China;Xi’an Engineering University,Office of Academic Affairs,710021,China;Western Engineering Research Center of Disaster and Protection Mitigation in Civil Engineering,the Ministry of Education,Lanzhou Univ. of Tech.,Lanzhou 730050,China)

机构地区：[1]西安工业大学建筑工程学院,陕西西安710021 [2]西安工程大学教务处,陕西西安710021 [3]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2019年第1期145-148,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51578274)

摘　　要：通过建立带有箍筋缺失的施工缺陷的RC框架梁柱节点的数值分析模型,对比研究箍筋缺失对梁柱节点力学性能的影响.结果表明,在荷载作用下,无缺陷节点的应力主要集中于梁端部,而箍筋缺失节点的应力则向节点核心区集中;与无缺陷节点相比,箍筋缺失节点的横向变形显著增大,节点核心区的约束能力明显降低;通过对比力-位移关系曲线可知,箍筋缺失节点的承载能力有所减小.The effect of stirrup missing on mechanical performance of beam-column joint was compared and investigated by means of building up a numerical analysis model for the joint of a RC framed beam-column with construction defect of stirrup missing.The result shows that the stress of the beam-column joint without construction defect will concentrate on the end of the beam,but the stress of beam-column joint with construction defect will concentrate on the joint core area under external loading in both foregoing cases.Compared with the joint without construction defects,the transversal deformation of the joint with stirrup missing will significantly increase,and the restrictive ability of the joint core area will reduce greatly.It can be known by contrasting force vs displacement curves that the bearing capacity of the stirrup missing joint will decrease to some extent.

关 键 词：施工缺陷 箍筋缺失 梁柱节点 力学性能 

分 类 号：TU312[建筑科学—结构工程] TU375