大底盘多塔楼结构地震反应

Earthquake Responses of Multi-Tower Structure with a Large Podium at Bottom

本文采用多串集中质量模型对大底盘单塔楼及多塔楼结构进行了弹性和弹塑性时程分析。在单塔楼结构中，考虑了底盘刚度、高度及承载力对结构地震反应的影响。在多塔结构中，研究了多塔的相互影响，比较了单塔及多塔的地震反应。在大量分析及比较的基础上，对大底盘结构的地震反应有进一步认识，并作了一些概念设计建议。

Elastic and elastoplastic earthquake responses of single-tower and multi-tower structures with a large podium at bottom are analysed in this paper.In which a model of multistring lumped masses and the method of time history analysis are employed.For the structure of single-tower with large podium,the effects of stiffness,height and load bearing capacity of the podium on earthquake responses of the tower above are calculaed and compared.For structures of multi-tower with a common large podium,the mutual influences between towers and the differences of responses between single-tower and multi-tower structures are investigated.As the results of a large number of analyses and comparisons of such structures,some design concepts are suggested in this paper.