摘要
基于拟静力试验,研究基于螺栓连接的新型钢筋混凝土(RC)框架装配式节点的抗震性能,并与装配整体式混凝土结构框架节点进行对比,分析破坏形态、滞回曲线、骨架曲线、位移和延性、刚度与承载力退化及耗能等指标,以及轴压比对新型节点抗震性能的影响。研究表明:新型节点相对于装配整体式节点,承载力降低19%,延性降低16. 7%,承载力与刚度退化加快,但具有更好的耗能能力;新型节点的破坏形式均为梁端受弯破坏;当轴压比小于0. 4时,增大轴压比可提高新型节点的初始刚度与承载力,但会降低延性及耗能能力,并加快刚度和承载力退化。
Through the quasi-static test,seismic behavior of new assembled joints of RC frame based on bolted connection was studied.Compared with the assembled integral RC frame joints,the failure mode,hysteretic curve,skeleton curve,displacement and ductility,stiffness and bearing capacity degradation and energy dissipation were analyzed,as well as the influence of axial compression ratio on the seismic behavior of the new joints.The results showed that the bearing capacity and ductility of the new type joints in the experiment were reduced by 19%and16.7%,the degradation of bearing capacity and stiffness was accelerated,but the energy dissipation ability was better.The failure mode of the new type joints was bending failure at the end of beam.When the axial compression ratio was less than 0.4,the initial stiffness and bearing capacity of the new joints could be improved by increasing the axial compression ratio,but the ductility and energy dissipation capacity would be reduced,and the degradation of stiffness and bearing capacity would be accelerated.
作者
杨曌
吕伟
包亮
YANG Zhao;LYU Wei;BAO Liang(Institute of Urban Construction,Wuhan University of Science and Technology,Wuhan 430065,China)
出处
《工业建筑》
CSCD
北大核心
2019年第8期93-99,共7页
Industrial Construction
基金
国家自然科学基金项目(51678457)
湖北省教育厅重点项目(D20171106)
武汉市城建委科技计划项目(201820)
关键词
装配整体式
螺栓连接
节点
滞回曲线
抗震性能
assembly integral
bolted connection
joint
hysteresis curve
seismic behavior
