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.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2010年第5期61-69,共9页
Journal of Building Structures
关键词
混凝土筒体-组合楼盖结构体系
概念设计
振动台试验
扭转周期
侧移刚度
抗震性能
concrete tube-composite slab structural system
concept design
shaking table test
torsional period
lateral stiffness
seismic behavior
