型钢混凝土异形柱中节点受力性能试验及有限元分析  

Experimental research and FEA on mechanical behavior of interior joint between SRC special shaped column and steel beam

作　　者：王妮[1] 陈宗平[1,2] 张士前[3] 陈宇良[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004 [3]同济大学建筑工程系,上海200092

出　　处：《建筑结构学报》2013年第S1期102-109,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(50908057;51268004);广西自然科学基金项目(2013GXNSFDA019025);广西研究生创新计划项目(YCBZ2012011;YCBZ2012005)

摘　　要：为了研究型钢混凝土(SRC)异形柱中节点的受力性能,设计5个SRC十形柱-钢梁中节点试件进行低周反复荷载试验,通过试验揭示其破坏机理,获取了荷载-位移滞回曲线、骨架曲线和主要特征点数据。试验结果表明:双向荷载作用下SRC异形柱中节点呈现正背面弯曲、侧面斜压粘结破坏的特点,滞回曲线对称饱满,综合受力性能较好。基于试验利用有限元软件ABAQUS对其进行了静力弹塑性分析,研究了轴压比和加载角度对SRC异形柱空间节点的抗震性能的影响。研究结果表明:数值分析结果与试验结果基本吻合,轴压比在0.2~0.4范围内增大轴压比可以提高试件的峰值荷载。加载角在0°~45°范围内随着加载角的增加试件的峰值荷载降低,加载角45°方向为最薄弱方向。In order to study the mechanical behavior of interior joint between steel reinforced concrete(SRC) special shaped columns and I shaped steel beam,five specimens were designed and tested under low cyclic loading.According to the test results,failure mechanism was revealed,and important data including the load-displacement hysteretic curves,skeleton curves and main characteristic data were obtained.The experimental results show that the joint specimens exhibit front and back flexural failure and diagonal compression bonding failure under bidirectional loading.The hysteretic curves are symmetrical and plump,indicating good mechanical behavior.Based on the test,static elasto-plastic analysis of specimen was completed making use of finite element software ABAQUS.The influences of axial compression ratio and load angle on seismic performance of interior joint with SRC special shaped column and Ishaped steel beam were studied.Research results show that numerical analysis results and experimental results are almost the same.Increasing axial compression ratio can improve the ultimate strength of specimens within the range of 0.2 to 0.4.The ultimate strength of the specimens is reduced with the increase of load angle within the range of 0° to 45°,and 45° load angle is the most unfavorable direction.

关 键 词：SRC异形柱框架结构 中节点 拟静力试验 有限元分析 受力性能 

分 类 号：TU398.9[建筑科学—结构工程]