| With the improvement of the human material level,people's demand become more and more enthusiastic for a broad scale spatial structure.And all kinds of new large-span spatial structure emerges in order to adapt to the building space developed into a span greater direction.How to select the reasonable structure form according to the architectural function requirement,combined with economy and safety principle is an important problem in the process of large span space structure design when faced to the different kinds of spatial structure.So the analysis of the structure selection has important scientific significance and practical demand in the process of the design of building structure.At present,in order to reflect the structural safety,applicability and economical efficiency,the analysis of large span spatial structure selection is main comparison the structure performance indicators and preferential selection the reasonable structure based on the fully grasp all possible selection structural.This paper analyze the model selection b three kinds of large-span spatial grid structure which has been widely applied for the current selection,and research the parametric modeling technology of large-span space structure on the basis of understanding of the arrangement rule of structure bar.Here use the structure calculation example analyzed the geometric parameters of single-layer reticulated shell,double layer reticulated shell and suspend-dome which has the same span,rise of arches,and then respectively obtained the mechanical property under effect of static load and earthquake and the quantitative data of the large span spatial structure comparison,at the same time,reveals the string a dome structure performance is superior to other specific degree of grid structure.This calculation results has strong comparative and typicality which would provide some reference for the later large span space structure scheme selection. |
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