T形钢管混凝土柱-混凝土梁外加强环板式节点抗震性能正交试验研究  

EXPERIMENTAL RESEARCH ON SEISMIC BEHAVIOR OF OUTER STIFFENING RING PLATE JOINTS OF T-SHAPED CONCRETE-FILLED STEEL TUBE COLUMN WITH REINFORCED CONCRETE BEAM BY ORTHOGONAL TEST METHOD

作　　者：戴绍斌[1] 谢军[1] 黄俊[1] 彭忠[1] 戎泽龙 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]浙江绿筑集成科技有限公司,上海201100

出　　处：《工业建筑》2017年第7期141-148,共8页Industrial Construction

基　　金：武汉市"黄鹤英才(专项)计划"

摘　　要：对18个T形钢管混凝土柱-混凝土梁外加强环板式节点采用有限元与正交试验法相结合的方式进行抗震性能研究。结果表明,节点的裂缝发展经历初裂、通裂、极限、破坏四个过程;牛腿在梁端荷载的传递过程中起到桥梁作用;最终以牛腿与梁交界处形成塑性铰而破坏,符合"强节点弱构件"的抗震设计思想。对节点极限承载力、位移延性系数以及能量耗散系数三个性能指标影响最为显著的因素均为框架梁配筋率。框架梁混凝土强度等级的提高可以提高节点极限承载力,但是增幅过大不利于节点抗震性能,所以工程设计时应合理地选择框架梁混凝土强度等级。The research on the seismic behavior of 18 outer stiffening ring plate joints of T-shaped concrete-filled steel tube column with reinforced concrete beam was conducted by the combination of finite element method and orthogonal test method. The results indicated that there were 4 stages of crack development of joint,which could be divided into the initial crack,the crack,the limit and the damage. In the process of load transferring on beam,the corbel played the role of bridge. The failure of joints was finally derived from the development of plastic hinges formed at the connection of corbel and beam,which accorded with the seismic design concept of ＂ strong-joint and weak-member＂.For the 3 performance index which were the bearing capacity,the displacement ductility factors and the energy dissipation factors of joints,the reinforcement ratio of frame beams played a significant role. Increasing concrete strength grade of frame beams could improve the bearing capacity,but might against the seismic behavior of joints when the concrete strength grade increased so much. Hence,the concrete strength grade of frame beams should be reasonably selected in engineering design.

关 键 词：T形钢管混凝土柱-混凝土梁外加强环板式节点 抗震性能 工作机理 正交试验 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9