内隔板式方钢管混凝土柱-钢筋混凝土梁节点试验  

Experimental study on square concrete filled steel tube column-reinforce concrete beam joints strengthened by inner diaphragms

作　　者：吴轶[1] 蔡健[2,3] 杨春[2,3] 朱昌宏[4] 

机构地区：[1]广州大学土木工程学院,广州510006 [2]华南理工大学土木与交通学院,广州510641 [3]亚热带建筑科学国家重点实验室,广州510641 [4]广州市城市规划勘测设计研究院,广州510060

出　　处：《建筑结构》2010年第7期88-91,共4页Building Structure

基　　金：国家自然科学基金(50878087);广东省自然科学基金(8151009101000010);广东省自然科学基金团队项目(8351009101000001);建设部项目(2009-2K-36)资助项目

摘　　要：为了研究内隔板式方钢管混凝土柱-钢筋混凝土梁节点的力学性能,完成了3个1∶2比例的内隔板式方钢管混凝土柱-钢筋混凝土梁节点模型试件低周反复试验。研究表明该节点具有较高的承载力和刚度,钢筋与钢牛腿的焊接连接可靠,并能有效地把应力传递到钢牛腿,钢牛腿能有效地传递梁端弯矩;试件破坏发生在钢牛腿外梁截面处,呈现出延性破坏特点;节点延性系数介于3~5,承载力在达到最大值后缓慢下降,节点具有较好的变形能力,满足＂强柱弱梁,节点更强＂的抗震设计原则。To study the mechanical behavior of square concrete filled steel tube （SCFST） column-reinforced concrete（RC） beam joints strengthened by inner diaphragms,three 1∶2 model specimens were tested under cycling loading.The results show that the SCFST column-RC beam joint can provide much higher bearing capacity and rigidity.The weld connection between reinforcing bars and steel corbel is reliable and the stresses can be effectively transferred to steel corbel.The moments at the end of the RC beam can be transferred by steel corbels effectively and ductile failure was found at the cross section outside the steel corbel.The ductile coefficients of the three specimens were between 3 and 5.The load decreased slowly after it reached the limited bearing capacity and the joints held good deformability.The seismic design requirements,strong column-weak beam and stronger joints,can be met.

关 键 词：方钢管混凝土 高强混凝土 节点 试验研究 延性 

分 类 号：TU375.3[建筑科学—结构工程]