具有中间弹性支承的网架桥

在结构工程中,空间网架已广泛地用于大跨屋盖结构．本文在阐述空间网架结构的优点及现有桥梁结构平面受力机理的基础上,分析了网架用于桥梁工程的可能性及合理结构形式（如具有中间弹性支承的网架系杆拱桥和网架斜拉桥）．计算和分析表明,网架用作桥梁结构具有整体性好、刚度大、受力均匀、抗震性好和用钢量少的特点．

Space Grid Bridges with Middle Elastic Supports

Space grid structures, one kind of space structures, have been widely and successfully used as long roof structures in structural engineering. In this paper, an investigation on the possible application of space grid structures to bridge engineering is discussed. Several reasonable forms of space grid bridges, such as "cable stayed bridge with space grid" and "space grid bridge with flexible arches",are presented. The conclusions of calculation and analysis express that the application of space grid structures in bridge engineering is of some characteristics, such as good integrity, large monolithic rigidity, uniform forces, anti seismic property and less amount of steel consumption.