大跨度四角锥网架分块安装施工数值模拟分析

用数值模拟的方法显示了网架结构在整个分块安装施工阶段的受力和变形状态,并从中找出了该结构在施工中最危险阶段,指出在施工各阶段中,结构的变形和杆件的内力均随施工过程而变;结构在施工中最危险的阶段通常不是竣工之后,而是在施工过程中,它与施工方法和顺序有关,只有通过数值模拟计算才能确定。

Numerical Simulation and Analysis on the Block Erecting Construction of the Large-span Pyramided Grid

By using the numerical simulation,this paper demonstrates the stressing and deforming states of the grid structure in all stages of the block erecting construction,and finds the most dangerous stage in the construction of the structure,and points out that in each stage of the construction,both the deformation of the structure and the inner force of the member bars are changing with the construction,and the most dangerous stage is commonly in the course of the construction rather than after the construction,and in the course of the construction they are related to the construction method and sequence and only can be determined through the calculation based on the numerical simulation.