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高层建筑的顶部常常有突出的构筑物。在地震时,这些突出部分往往产生剧烈振动,很容易损坏甚至脱落。本文从耦合振子的动力特性出发,阐明了产生这种鞭梢效应的机理,并用数字例题证实了这一理论分析的正确性,文章表明,增大顶部突出部分的刚度不一定有利于减小鞭梢效应。应该在设计阶段通过动力计算来检验结构是否易于产生鞭梢效应,并按计算结果来调整结构的刚度或质量分布。
High-rise buildings often have prominent structures on the top. During an earthquake, these protruding parts tend to produce violent vibrations that are easily damaged or even fall off. This paper starts from the dynamic characteristics of coupled oscillators and clarifies the mechanism of this whiplash effect. The correctness of this theoretical analysis is confirmed by numerical examples. The article shows that increasing the rigidity of the top protruding part is not necessarily conducive to reducing the whip. Tip effect. At the design stage, dynamic calculations should be used to verify that the structure is prone to whiplash effects and to adjust the stiffness or mass distribution of the structure according to the calculations.