斜拉桥箱形主梁底板厚度的参数分析

Parameter Analysis of Bottom Flange Thickness of Main Girder with Box Cross Section Used in Cable-stayed Bridge

对斜拉桥不同底板厚度的箱形主梁建立了五个有限元模型,并对其进行了施工阶段的空间应力分析.通过分析,归纳出斜拉桥中此类双箱单室倒梯形截面在不同底板厚度下的应力变化,并在此基础上提出合理化设计及优化措施,以望对今后斜拉桥主梁的设计和施工提供一定的参考.

Five different finite elementary models are established based on box girder with different thickness of the bottom flange of cable-stayed bridge. Three-dimensional stresses of the models have been analyzed. The stress varies in different thickness of bottom flange of twin-box single cross hammerhead sections of cable-stayed bridge are also indicated. The reasonable design and the optimum measure are proposed. By the result, some references for the future design and construction of girder of cable-stayed bridge are provided.