部分包裹混凝土柱-型钢梁顶底角钢连接框架抗震性能研究  

Research on seismic behavior of frame of partially encased concrete( PEC)column and steel beam connected with top-bottom angle

作　　者：赵根田 左延辉 Zhao Gentian, Zuo Yanhui(School of Civil Engineering, Inner Mongolia University of Science ＆ Technology, Baotou 014010, Chin)

机构地区：[1]内蒙古科技大学土木工程学院

出　　处：《建筑结构》2018年第6期76-81,共6页Building Structure

基　　金：国家自然科学基金项目(51268042)

摘　　要：为研究部分包裹混凝土柱-型钢梁顶底角钢连接三维框架的抗震性能,对框架试件进行低周反复水平荷载试验,研究此类框架的破坏模式和承载力、滞回性能、延性等一系列抗震性能指标。研究结果表明：框架梁端屈曲明显,靠近角钢肢处出现塑性铰,顶底角钢变形严重;滞回曲线比较饱满,在各级循环荷载作用下承载力降低系数在0.95-0.99之间,框架强度退化稳定。节点位移延性系数在2.01-2.85之间,等效黏滞阻尼系数在0.35-0.46之间,满足抗震设计要求,框架具有良好的延性和耗能能力。顶底角钢连接节点的初始转动刚度在半刚性节点范围内,是延性较好的节点。In order to study the seismic behavior of three-dimensional frame of PEC column and steel beam jointed by top-bottom angle,the frame specimen was tested under low cycle reversed quasi-static loading. The seismic behavior indicators were analyzed,such as the failure mode,bearing capacity,hysteretic behavior and displacement ductility coefficient. The results show that： the steel beam end buckles significantly,the plastic hinge appears near the limb of the angle and the top-bottom angle steel seriously deforms. Hysteresis curve of the frame is relatively full,and the bearing capacity reduction factor level is between 0. 95 and 0. 99. Strength degradation of frame is stable under cyclic load. The displacement ductility coefficient of joints is ranged from 2. 01 to 2. 85,and the equivalent viscous damping coefficients is between 0. 35 and 0. 46,which meets the seismic design requirements. The three-dimension frame had good ductility and energy dissipation capacity. The initial rotational stiffness of top-bottom angle joint is in the range of semi-rigid joint,which has good ductility.

关 键 词：部分包裹混凝土 角钢连接 框架 拟静力试验 抗震性能 

分 类 号：TU398[建筑科学—结构工程]