小底盘高裙房双塔超高层结构单塔模型选择方法
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摘要
由于各塔楼之间的扭转耦联,小底盘高裙房双塔楼结构表现出复杂的结构特性。根据整体模型计算的自振周期,很难判断具体属于哪个塔楼。为控制周期比,需要建立多个单塔模型来验算周期比,单塔模型的剖分应使其计算的位移、内力与整体模型计算结果尽量一致。以某实际工程为例,提出了小底盘高裙房双塔结构单塔模型的剖分方法,对3个计算模型进行结构静力弹性分析,比较了各模型的自振周期、位移比、剪重比和刚重比,得出一些有益的结论,可为类似工程的设计提供借鉴。
Due to the torsion coupling between towers,the twin-tower structure with small-chassis and high-podium exhibits the complex structural characteristics.The period belongs to which tower can not be evaluated by the overall calculations.The multiple single tower models should be set up to control the period ratio.The results of calculation such as displacement and internal force should be uniform between single tower model and overall model.The separating method for obtaining single tower model was investigated by a practical project,The results of static elastic analysis of three different models,such as the period,the displacement ratio,the shear-weight ratio,and the rigidity-gravity ratio,were compared.The conclusion is expected to provide a useful reference for the analysis and design of similar high-rise building structures.
Due to the torsion coupling between towers,the twin-tower structure with small-chassis and high-podium exhibits the complex structural characteristics.The period belongs to which tower can not be evaluated by the overall calculations.The multiple single tower models should be set up to control the period ratio.The results of calculation such as displacement and internal force should be uniform between single tower model and overall model.The separating method for obtaining single tower model was investigated by a practical project,The results of static elastic analysis of three different models,such as the period,the displacement ratio,the shear-weight ratio,and the rigidity-gravity ratio,were compared.The conclusion is expected to provide a useful reference for the analysis and design of similar high-rise building structures.
引文
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[2]余继兴,张明,沈蒲生.大底盘三塔高层结构地震反应[C]//全国第十届混凝土结构基本理论及工程应用学术会议,2008:146-150.
[3]刘鹏飞,王建,王慧.青岛财富中心超限高层建筑结构概念设计[J].建筑结构,2008,38(5):1-5.
[4]刘鹏飞,孙洪波.青岛财富中心超限高层Pushover分析[J].青岛理工大学学报,2009,30(3):69-74.
[5]徐培福,黄吉锋,韦承基.高层建筑结构扭转反应控制的讨论[J].建筑结构,2006,36(7):1-10.
[6]魏琏,王森.水平地震作用下大底盘多塔结构抗扭设计方法[J].建筑结构,2005,35(8):3-7.
[7]范重,吴学敏.带有双塔高层建筑结构动力分析[J].建筑结构学报,1996,17(6):11-18.
[8]杨学林,意德清.多塔楼高层结构振动特性与抗震设计[J].工程力学,2001,18(2):77-81.
[9]包世华,王建东.大底盘多塔楼结构的振动计算[J].建筑结构,1996,26(6):3-9.
[10]杨星.PKPM结构软件工程应用及实例剖析[M].北京:中国建筑工业出版社,2010.
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