联方-凯威特型弦支穹顶结构的地震响应分析

Seismic Performance of Lamella-Kiewitt Suspending-dome Structures

联方-凯威特组合型弦支穹顶结构是一种新型空间网壳形式,目前研究较少。采用时程分析法对联方-凯威特组合型弦支穹顶结构进行地震响应分析,通过分析杆件和节点的内力及位移时程响应曲线,得到结构的内力与位移分布规律;进而考虑结构柱支承不均匀变形的影响,得到结构地震响应的变化规律;在此基础上,对矢跨比、环数比、支座形式等主要参数进行变参数研究,通过分析结构各个构件的动内力响应水平得到主要参数对结构动力响应水平的影响;为同类网壳的工程应用提供理论参考。

The lamella-Kiewitt suspending-dome structure is a new shell style structure and it is not fully stud-ied.Time-history analyses under horizontal seismic actions were performed in this paper.Dynamic internal forces and displacements were obtained and studied.Considering the non-uniform deformation of the column supports,the seismic response features for this type of structure were obtained.Various parameters,including the rise span ratio,ring number ratio and support form were investigated by using the maximum member inter-nal forces as the index.