摘要
本文以双层柱面网壳为研究对象 ,系统地研究了网壳屋盖与下部支承结构共同工作问题。针对钢网壳及混凝土支承体系这类组合结构 ,论文首先推导出不同材料组合结构阻尼比的实用计算公式。进而通过对固定铰支座、弹性支座和整体分析模型多个网壳结构计算结果进行对比 ,指出若不考虑支承刚度而按固定铰支承进行分析将使设计极为不安全。
A systematic study on the dynamic interaction between cylindrical lattice shells and the supporting structures was carried out in this paper. In order to analyze the global system of steel lattice shells and concrete supporting structures, the simplified formula of damping ratio of the systems composed of different materials was derived. The thorough comparison of the internal forces in the members for lattice shells by using different calculating models was made. It is concluded that the interaction between lattice shells and the supporting structures can not be neglected. It would not be safe by adopting the separated lattice shell models with the hinged bearings. In result, the practical calculating models with the elastic bearings was given, instead of the global models.
出处
《空间结构》
CSCD
2001年第2期19-26,共8页
Spatial Structures
关键词
双层柱面网壳
整体模型
弹性支座
屋盖
cylindrical lattice shells
global model analysis
elastic bearing
damping ratio
