摘要
车辐式大跨度张拉索膜结构由于质量轻、刚度相对较弱,对地震作用具有良好的适用性,但对脉动风作用却比较敏感.国内外由动风荷载引起的大跨度索膜结构的破坏也屡见不鲜.本文运用非线性有限元动力时程方法对该类结构进行了参数化分析,其中主要讨论了不同预应力度和膜材张拉刚度对车辐式大跨度张拉索膜结构风振响应的影响,并对动风等效进行了初步分析,得到了可供工程实际参考的动风等效系数.
Rung-shape tensile cable membrane structure can cross long span because of its light mass and rational mechanical behavior.Due to these characters,this kind of structure has good seismic behavior,but it is very sensitive to wind load.Some long span cable membrane structures had been destroyed by strong wind in the world.In this paper non-linear transient analysis method was used to analyze this kind of structure with different factors.The influence of prestressing degree and tensile rigidity of membrane on wind-induced response analysis of rung-shape tensile cable membrane structure is discussed.Dynamic wind equivalent coefficient which can be used in structural design was also given in the paper.
出处
《空间结构》
CSCD
北大核心
2010年第2期67-71,共5页
Spatial Structures
关键词
车辐式索膜结构
预应力度
张拉刚度
风振响应分析
动风等效系数
rung-shape tensile cable-membrane structure
prestressing degree
tensile rigidity
wind-induced response analysis
dynamic wind equivalent coefficient
