国家游泳中心子结构模型抗震能力分析  

Seismic-resisting capacity analysis of a sub-structure model of the National Swimming Center

作　　者：胡晓斌[1] 钱稼茹[1] 傅学怡 顾磊 

机构地区：[1]清华大学土木工程系结构工程与振动教育部重点实验室,北京100084 [2]中建国际设计顾问有限公司,北京100029

出　　处：《空间结构》2007年第2期3-10,共8页Spatial Structures

基　　金：国家科技攻关计划课题(2004BA904B02);北京市科技计划项目(Z0004028040221)

摘　　要：国家游泳中心子结构模型分析结果与试验对比表明,焊接空心球(半球)节点对子结构模型整体刚度有较大贡献,用带刚域的集中塑性铰杆单元建立的分析模型能较好地模拟子结构模型的弹塑性性能.采用该分析模型,分别用能力谱法和弹塑性时程分析法对子结构模型进行罕遇地震反应分析.结果表明,两种方法的计算结果很接近;罕遇地震作用下子结构模型仅少量杆件屈服,整体上处于弹性,具有很强的抗震能力.Comparison of analytical results and experimental results of a sub-structure model of the National Swimming Center shows that the welded hollow spherical （semi-spherical） joints have significant contribution to the overall stiffness of the model. The elasto-plastic characteristics of the model can be well simulated by a beam element model with lumped plastic hinge and rigid zone at the two ends of the element. The beam element model is employed to perform seismic response of the test model under the rare earthquake by using capacity spectrum method and elasto-plastic time history analysis method respectively. The analytical results of the two methods are very close. Under the rare earthquake ground excitation, the sub-structure model works elastically as a whole and only few elements yield, which shows the sub-structure model has large seismic-resisting capacity.

关 键 词：国家游泳中心 子结构模型 焊接空心球(半球)节点 能力谱法 弹塑性时程分析法 抗震能力 

分 类 号：TU393.3[建筑科学—结构工程] TU311.3