世博会中国馆国家馆抗震性能分析
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摘要
2010年上海世博会中国馆的国家馆底部架空,展区部分层叠出挑,呈四棱台斗冠状,屋面高度处从混凝土筒体出挑34.75m,由于转动惯量大,导致结构的扭转周期成为第一周期。本文介绍针对该结构的特点与抗震性能目标所进行的概念设计、有限元分析和振动台试验结果。概念设计、有限元分析和振动台试验表明:结构扭转反应较小,设计中采用通过合理的结构布置控制结构的扭转反应而不控制结构周期比的方法是可行的;结构的整体抗震性能较好,所采取的在各混凝土筒体的转角部位设置方钢管、控制剪力墙的剪应力水平、控制剪力墙的轴压比、连梁内增设型钢梁等措施是有效的。研究成果可为今后同类结构的抗震设计提供参考。
The National Pavilion of China Pavilion at the World Expo 2010 is overhead,like a inverse quadrangular frustum pyramid crown,with spreading layer upon layer at the exhibition hall.It extends 34.75m from tube at the roof.For larger inertia moment,the first period of the structure is torsional period.This paper introduced conceptual design for seismic characteristic and objective,results of FEA and earthquake simulation shaking table test.The results show that the torsional response of the structure is small.It is feasible to control torsional response by reasonable structural arrangement but not the period ratio.Seismic behavior of the structure is good,the measures of strengthening seismic behavior are effective that setting square steel tube at corner of concrete tubes,controlling shear stress level of shear wall,controlling axial compression ratio of shear wall,adding shaped steel in coupling beam.
The National Pavilion of China Pavilion at the World Expo 2010 is overhead,like a inverse quadrangular frustum pyramid crown,with spreading layer upon layer at the exhibition hall.It extends 34.75m from tube at the roof.For larger inertia moment,the first period of the structure is torsional period.This paper introduced conceptual design for seismic characteristic and objective,results of FEA and earthquake simulation shaking table test.The results show that the torsional response of the structure is small.It is feasible to control torsional response by reasonable structural arrangement but not the period ratio.Seismic behavior of the structure is good,the measures of strengthening seismic behavior are effective that setting square steel tube at corner of concrete tubes,controlling shear stress level of shear wall,controlling axial compression ratio of shear wall,adding shaped steel in coupling beam.
引文
[1]方小丹,韦宏,陈福熙,等.中国2010年上海世博会中国馆国家馆超限高层建筑抗震设计可行性报告[R].广州:华南理工大学建筑设计研究院,2008.(FANG Xiaodan,WEI Hong,CHEN Fuxi,et al.Feasibility study on the structural design exceeding thecode limits of the National Pavilion of China Pavilion atExpo Shanghai 2010[R].Guangzhou:ArchitecturalDesign and Research Institute,South China Universityof Technology,2008.(in Chinese))
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[5]同济大学土木工程防灾国家重点实验室.中国2010年上海世博会中国馆国家馆结构模型模拟地震振动台试验研究报告[R].上海:同济大学土木工程防灾国家重点实验室,2008.(State Key Laboratory ofDisaster Reduction in Civil Engineering,TongjiUniversity.Report on shaking table test of ChinaPavilion National Pavilion at the World Expo 2010Shanghai[R].Shanghai:State Key Laboratory ofDisaster Reduction in Civil Engineering,TongjiUniversity,2008.(in Chinese))
[6]吴晓涵,孙方涛,吕西林,等.上海世博会中国馆结构弹塑性时程分析[J].建筑结构学报,2009,30(5):112-118.(WU Xiaohan,SUN Fangtao,LU Xilin,et al.Elasto-plastic time history analysis of the structure ofChina Pavilion at the 2010 World EXPO[J].Journal ofBuilding Structures,2009,30(5):112-118.(inChinese))
[2]方小丹,韦宏,江毅,等.广州西塔结构抗震设计[J].建筑结构学报,2010,31(1):47-55.(FANG Xiaodan,WEI Hong,JIANG Yi,et al.Seismic design of theGuangzhou West Tower[J].Journal of BuildingStructures,2010,31(1):47-55.(in Chinese))
[3]DGJ 08-9—2003建筑抗震设计规程[S].(DGJ 08-9—2003 Specifications for seismic design of buildings[S].(in Chinese))
[4]李云贵,邵弘,田志昌,等.多层、高层建筑结构弹塑性动力、静力分析[J].建筑结构学报,2002,23(5):56-62.(LI,Yungui,SHAO Hong,TIAN Zhichang,etal.Elastic-plastic dynamic and static analysis ofbuilding structures[J].Journal of Building Structures,2002,23(5):56-62.(in Chinese))
[5]同济大学土木工程防灾国家重点实验室.中国2010年上海世博会中国馆国家馆结构模型模拟地震振动台试验研究报告[R].上海:同济大学土木工程防灾国家重点实验室,2008.(State Key Laboratory ofDisaster Reduction in Civil Engineering,TongjiUniversity.Report on shaking table test of ChinaPavilion National Pavilion at the World Expo 2010Shanghai[R].Shanghai:State Key Laboratory ofDisaster Reduction in Civil Engineering,TongjiUniversity,2008.(in Chinese))
[6]吴晓涵,孙方涛,吕西林,等.上海世博会中国馆结构弹塑性时程分析[J].建筑结构学报,2009,30(5):112-118.(WU Xiaohan,SUN Fangtao,LU Xilin,et al.Elasto-plastic time history analysis of the structure ofChina Pavilion at the 2010 World EXPO[J].Journal ofBuilding Structures,2009,30(5):112-118.(inChinese))
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