海峡会展中心展馆结构动力特性分析

Analysis on Dynamic Characteristics of Hall structure for Strait International Conference Exhibition Center

为了更好地了解海峡会展中心结构的动力特性,为大型复杂结构的设计与施工提供技术支持,文章根据展馆结构布局的差异性,建立了含地下室的整体结构和非地下室结构两个空间有限元计算模型,通过大型有限元软件计算其自振周期和振型等特征值,深入系统地研究了展馆结构的动力特性以及考虑和不考虑地下室结构对展馆结构动力特性的影响,并研究比较了展馆结构基本周期与场地卓越周期之间的关系。研究发现,两种有限元模型都能有效反映展馆结构低阶模态的动力特征,在后期的施工与设计中应重点考虑上部钢结构部分的内力与位移变化;场地卓越周期与结构基本周期关系良好,地震对展馆结构的动力响应不会产生加剧的趋势。

The aim is to provide technique supports for the design and construction of complex structures by analyzing the dynamic characteristics of Strait International Conference Exhibition Center （SICEX）. On the basis of the differences of structure layout and structure materials, two finite element models of the integral structure and the large--span structure without basement are built to study the dynamic performances of structural properties, such as natural period and mode shapes, in details. Moreover, the effect of two models on dynamic characteristics is conducted and a comparison is made between predominant period of construction site and the natural period of the SICE. The results show that both the models can not only perfectly analyze the dynamic characteristics in the lower modes, but indicate that it should be focused on the variation of internal forces and displacements in the upper steel section in the posteriority design and construction. Furthermore, the good relationship between the predominant period of site and the natural period of the SICE, implies that the dynamic response of the SICE will not be amplified induced by earthquake.