核筒悬挂建筑减振体系主结构的抗侧性能
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摘要
对核筒悬挂建筑减振体系主结构的抗侧性能进行了分析,结果表明:在倾覆力矩没有明显增加的前提下,考虑与箱基础倾斜耦合作用的主结构侧向位移比不考虑耦合作用的可能大1倍以上;当悬挂建筑结构的基准频率ω1不变时,其侧向振动幅值受上部结构阻尼比ξ1和激励频率比β的影响显著;推导出了正六边形核筒悬挂建筑主结构在不同抗震设防烈度时的名义高宽比限值,其中,在9度区高宽比限值比较小,因此不适合建造单核筒式悬挂建筑,但可以选择巨型框架式等其他形式。
The lateral performance of the main structure of core-tube suspended vibration absorption system is analyzed. The results show that the lateral displacement when considering coupling effect will possibly be twice as that without coupling effect consideration while the overturning moment almost keeps the constant value. When the first order frequency ω1 of the suspended system is invariant,the displacement amplitude of the structure is affected remarkably by the damping ratio ξ1 of the superstructure and the stimulation frequency ratio β. The nominal height-to-width ratios of the main structure of hexagonal core-tube suspended vibration absorption system under different seismic fortification intensities are derived. In the 9-degree seismic zone the height-to-width ratio is small,so the single-core-tube suspended building is not preferred,but other types of suspended system,for example,the mega-frame suspended system,can be slected.
The lateral performance of the main structure of core-tube suspended vibration absorption system is analyzed. The results show that the lateral displacement when considering coupling effect will possibly be twice as that without coupling effect consideration while the overturning moment almost keeps the constant value. When the first order frequency ω1 of the suspended system is invariant,the displacement amplitude of the structure is affected remarkably by the damping ratio ξ1 of the superstructure and the stimulation frequency ratio β. The nominal height-to-width ratios of the main structure of hexagonal core-tube suspended vibration absorption system under different seismic fortification intensities are derived. In the 9-degree seismic zone the height-to-width ratio is small,so the single-core-tube suspended building is not preferred,but other types of suspended system,for example,the mega-frame suspended system,can be slected.
引文
1涂永明.CFRP索悬挂建筑结构静力和动力分析及研究:[博士学位论文].南京:东南大学,2005
2Peter Dunican.The Art of Structural Engineering.The Structural Engineer,1966,44(3):97-108
3Anon.Germans Hang Floors on Prestressed Members.Engineering News-record,1965:50-51
4涂永明,吕志涛,张继文,等.正六边形核筒悬挂结构中筒体受水平力作用的连续化分析.工业建筑,2008,38(增刊):152-158
5邓志恒,秦荣.巨型框筒部分悬挂结构控制体系地震反应特性及阻尼控制研究.地震工程与工程振动,2002,22(4):133-138
6Zhang Y H,Liang Q Z.Asynchronous Driving Principle and Its Applicationto Vibration Control.Earthquake Engineering and Structural Dynamics,2000,29(2):259-270
7王肇民,邓洪洲,董军.高层巨型框架悬挂结构体系抗震性能研究.建筑结构学报,1999,20(1):23-30
8Feng M Q,Mita A.Vibration Control of Tall Building Using Mega Subconfiguration.Journal of Engineering Mechanics,1995,121(10):1082-1088
9GB50010-2002混凝土结构设计规范
10JGJ3-2002高层建筑混凝土结构技术规程
2Peter Dunican.The Art of Structural Engineering.The Structural Engineer,1966,44(3):97-108
3Anon.Germans Hang Floors on Prestressed Members.Engineering News-record,1965:50-51
4涂永明,吕志涛,张继文,等.正六边形核筒悬挂结构中筒体受水平力作用的连续化分析.工业建筑,2008,38(增刊):152-158
5邓志恒,秦荣.巨型框筒部分悬挂结构控制体系地震反应特性及阻尼控制研究.地震工程与工程振动,2002,22(4):133-138
6Zhang Y H,Liang Q Z.Asynchronous Driving Principle and Its Applicationto Vibration Control.Earthquake Engineering and Structural Dynamics,2000,29(2):259-270
7王肇民,邓洪洲,董军.高层巨型框架悬挂结构体系抗震性能研究.建筑结构学报,1999,20(1):23-30
8Feng M Q,Mita A.Vibration Control of Tall Building Using Mega Subconfiguration.Journal of Engineering Mechanics,1995,121(10):1082-1088
9GB50010-2002混凝土结构设计规范
10JGJ3-2002高层建筑混凝土结构技术规程
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