基于滑移理论的装配式混凝土框架延性节点研究  

Study of Ductile Joints for Precast RC Frame Based on Slip Theory

作　　者：罗春燕[1] 符鹏鹏[1] 张吾渝[1] 王运达 董可可[1] Luo Chunyan;Fu Pengpeng;Zhang Wuyu;Wang Yunda;Dong Keke(Civil Engineering College of Qinghai University,Xining 810016,China)

机构地区：[1]青海大学土木工程学院,西宁810016

出　　处：《科技通报》2017年第7期187-192,共6页Bulletin of Science and Technology

基　　金：青海大学中青年科研基金项目(2015-QGY-8);青海省科技厅项目(2015-ZJ-720)

摘　　要：依据我国《建筑抗震设计规范》[1]"三水准"的抗震设防目标,以"延性耗能节点,节点区较弱于预制构件"为基本设计原则,设计"滑移理论"为基础的装配式框架"多重耗能机制"延性节点,考虑到装配式框架侧向刚度较薄弱,沿预制框架梁纵向设置预制框架柱横向支撑,形成结构传力途径与控制结构侧向变形截然分开的新型结构体系。最后对节点关键连接部位的力学性能及影响节点延性性能的关键技术问题:节点耗能机制、滑移路径、延性连杆,进行了分析研究。研究表明,滑移路径对延性节点耗能机制的有效发挥、框架竖向荷载的传递、框架稳定性等起关键性作用;通过改变普通连杆两端的约束条件,可有效改善连杆的延性性能使其成为延性连杆,这对增强延性节点在大震作用下的耗能能力起到了重要作用。According to Three Level seismic fortification goal in Code for Seismic Design of Buildings(GB50011-2010)[1],this design of ductile joints for precast RC frame is based on slip theory and thebasic principle that“ductility node energy consumption,the area is weak in precast structure”.Given thefact that the lateral stiffness of precast frame is weak,the writer point out by setting up precast framecolumn horizontal support along longitudinal frame beams of the precast frame can thereby form a newstylestructure system which can completely separate the power transmission route structure and thelateral deformation control structure.Finally,in this thesis,the writer analyzed the mechanical propertiesand the key technical problems that affect the node ductility performance:node energy dissipationmechanism,slide path,ductile link.Studies have shown that glide path plays a critical role in ductilityjoint energy dissipation mechanism,the frame of the vertical load transmission,the overall stability of theframe etc.By changing the constraint conditions of the common connecting rod,the ductility of theconnecting rod can be improved effectively,which is of great importance in enhancing the energydissipation capacity of ductile joints under large earthquakes.

关 键 词：装配式框架 滑移理论 延性节点 多重耗能机制 滑移路径 延性连杆 

分 类 号：TU755[建筑科学—建筑技术科学]