新型预制装配框架混凝土梁柱节点抗震性能研究  

Research on Seismic Behavior of a New Style Precast Concrete Beam-to Column Connection

作　　者：于建兵[1] 郭正兴[1] 管东芝[1] 袁晨迪 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《湖南大学学报（自然科学版）》2015年第7期42-47,共6页Journal of Hunan University:Natural Sciences

基　　金：'十二五'国家科技支撑计划资助项目(2011BAJ10B03)

摘　　要：采用足尺模型对比试验方法,对现浇混凝土梁柱组合件、4个新型预制混凝土装配整体式框架结构梁柱节点进行低周反复荷载试验,研究新型预制装配框架节点的破坏形态、滞回特性、骨架曲线、耗能能力等抗震性能指标.试验结果表明:通过在节点核心区设置附加钢筋,可以实现梁端塑性铰的外移.装配框架节点的滞回曲线较丰满,在加载前期等效黏滞阻尼系数较现浇节点小,但是在加载到极限荷载时,装配节点的等效黏滞阻尼系数与现浇节点基本相当乃至超过现浇节点,说明新型节点具有较好的耗能能力,能够满足抗震规范要求的'强柱弱梁,强节点弱构件'的要求.Full-scale model test method was used to investigate the seismic behavior of cast in place beam-column assembly and four new precast concrete beam-to-column connections under low-cycle reversed loading. The estimation was given for the seismic performance of new precast connection on the basis of the failure mechanism on the beam-column connections, as well as hysteretic loops, ductility, energy dissi- pation, etc. The results indicate that, by setting additional reinforcement in the core area of the node, it can achieve the relocation of the plastic hinge at the end of beam. The hysteresis curve of the new precast connection is plumpy, and in the pre-load, the equivalent viscous damping coefficient was smaller than the cast in place connection. However, when loaded into the ultimate load, the equivalent viscous damping co- efficient of precast connections was roughly equal and even exceeded cast in place connection. It has been shown that the new connection has a better energy dissipation capacity, and can meet the requirements of ＂strong column weak beam, stronger joint＂.

关 键 词：抗震性能 预制混凝土 低周反复荷载试验 滞回性能 

分 类 号：TU317.1[建筑科学—结构工程] TU398.2