横隔板间距对钢桥面板疲劳应力幅的影响

摘要

根据国内外钢箱梁的设计经验,选取3种不同的横隔板设置形式,通过有限元方法建立钢箱梁的空间有限元模型,计算横隔板与U肋相交的桥面板、U形加劲肋的对接处、横隔板过焊孔处等4种构造细节在车轮荷栽作用下的应力幅,得出横隔板设置形式对桥面板疲劳应力幅的影响.%Based on design experiences for steel box girders at home and abroad, this paper chooses three different setup forms of diaphragms, establishes the spatial finite element model of steel box girder by means of the finite element method, calculates stress amplitudes of four construction details including intersected bridge decks between diaphragms and U-shaped ribs, joints between U-shaped reinforced ribs and places of diaphragms across welding holes, etc. Under effect of wheel load, and obtains influences of setup forms of diaphragms on fatigue stress amplitudes of bridge decks.