摘要
为研究钢-混凝土组合节点刚度对组合框架抗震性能的影响,首先讨论了组合节点的刚度及其影响因素,然后通过某多层钢结构工程实例,利用Ansys有限元软件建立了纯钢框架与组合框架,分别假定刚接及考虑节点刚度等共4种框架模型,进行了多遇地震反应谱分析及弹性时程分析,并进行了计算对比.计算结果表明,考虑钢框架的组合作用后,结构整体自振周期变短,基本自振周期降低了13.4%,说明结构整体刚度变大.但考虑节点刚度后,地震周期又有所加大,纯钢框架及组合框架基本自振周期均增大了17%,相应地震位移变大,2种模型的反应谱法分析顶层位移分别增大了8%,11%,说明组合节点刚度对结构的抗震性能是不可忽略的因素.
To study the main influence of composite joints rigidity on composite frame seismic properties, this paper at first discusses composite joint rigidity and influence factors, and then through a multi - storied steel project, creates frame composite frame and different joint style four model based with finite element software ANSYS, and contrasts the results of response spectrum analysis to elastic time - history analysis. The results which take the composite effect into account show that the natural vibration period is shorter by 13.4 %, the stiffness of the structure is larger than not. But considering the rigidity of joints, the natural vibration period is larger by 17%, the drifts of earthquake are larger, and the top drifts is larger 8 % and 11%. the rigidity of composite joints can not be ignored in earthquake.
出处
《郑州大学学报（工学版）》
CAS
2006年第2期8-13,共6页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学研究基金资助项目(50578083)
关键词
组合框架
组合节点刚度
自振周期
层位移
底层层剪力
composite frame
composite rigidity of joint
natural vibration period
drift of story
base shear force
作者简介
王元清（1963-），男，安徽霍山人，清华大学副教授，博士，主要从事结构工程方面教学与研究．
