天津国家会展中心中央入口大厅树状结构优化分析

Optimization and analysis of tree structure for central entrance hall of National Convention Center

树状结构造型美观、传力合理,已越来越多地被应用于建筑结构中.天津国家会展中心体量庞大,其中央入口大厅树状结构形象突出,是整个建筑最具代表性的部分.采用MIDAS Gen建立中央入口大厅整体结构模型,经分析,中央入口大厅树状结构部分杆件应力与应力比均较小,具有一定的优化空间.通过减小截面尺寸与壁厚对该树状结构进行优化,经过优化分析,树状结构可以满足安全性的要求,并且节省用钢量超过500t.同时建立中央入口大厅森林结构体系,经过对比分析,森林结构体系较树状结构具有更为优良的力学性能.

Tree structure has been more and more used in building structure because of its attractive appearance and reasonable mechanical behavior.The National Convention Center is huge in size,and the tree structure of its central entrance hall has become highlight and the most representative part of the whole structure.MIDAS Gen has been used to analyze the whole structure model of the central entrance hall.Both the stress and stress ratio of some members of the tree structure of the central entrance hall are small,so it can be optimized.The tree structure has been optimized by reducing the section size and wall thickness.After the optimization,the tree structure can satisfy the request of safety and reduce the steel consumption more than 500 tons.The forest structure system for the central entrance hall has also been set up.Through comparison and analysis,the forest structure system is proved to have better mechanical property than the tree structure.