摘要
中交国际中心结构总高度213.1m,为超B级框架-核心筒结构,其顶部塔冠为观光平台,高度42.8m,采用钢框架支撑结构,并通过底部转换桁架与下部钢筋混凝土主体结构相连。由于上部结构形式与下部主体结构差异较大,鞭梢效应较明显。采用反应谱分析法、时程分析法以及楼面谱法3种方法对塔冠地震作用放大系数进行估算,得到单独分析塔冠时的地震力放大系数为2.0。此外采用MIDAS,3D3S两种软件对塔冠结构进行了弹性对比分析,并对重要节点进行了实体有限元分析,保证了结构在大震下的传力安全,所采用的分析方法可为同类结构的设计提供参考。
The total structural height of CCCC International Center is 213.1 m and it is a frame-corewall structure which exceeds B-level height requirement in code,and the top tower crown is used for sightseeing which is 42.8 m high.The steel frame bracing structure is applied to the tower crown and it is connected to the lower reinforced concrete main structure by the bottom transfer truss.The upper structural form is largely different from lower main structure,so the whipping effect is obvious.The seismic action amplification coefficient was estimated by response spectrum analysis method,time-history analysis method and floor spectrum method,and the seismic force amplification coefficient was 2.0 when the crown tower was analyzed separately.In addition,MIDAS and 3 D3 S softwares were used to carry out elastic analysis on crown structure respectively,and nodal finite element analysis was applied to analyze some important nodes,the safety of force transmission under rare earthquake was ensured.The analytical method can be used to provide reference for similar structure design.
出处
《建筑结构》
CSCD
北大核心
2017年第23期16-21,共6页
Building Structure
关键词
框架-核心筒结构
塔冠
鞭梢效应
节点有限元
frame-corewall structure
tower crown
whipping effect
nodal finite element
