波形钢腹板箱梁横隔板间距的研究

Research on Diaphragm Distance of Box Girder with Corrugated Steel Webs

与传统的混凝土腹板的箱梁相比,波形钢腹板箱梁在偏心荷载作用下畸变效应有所增强,因而需要在跨内设置横隔板来减小畸变翘曲正应力。通过空间有限元分析,验证了横隔板对减小偏载作用下箱梁的翘曲正应力的作用,并分别针对不同高跨比条件下横隔板间距进行了计算分析,回归出了相应的经验公式,而且考虑了钢腹板竖向倾斜角度的影响,为波形钢腹板箱梁的合理设计提供参考。

Distortion effect in box girders with corrugated steel webs under eccentric loading is more evident than that in conventional box girders with concrete webs.Thus diaphragms are very essential for box girders with corrugated steel webs to decrease warping normal stress under eccentric loading. The finite element method has proved that diaphragms are effective to decrease warping normal stress under eccentric loading. With different ratios of height and span of box girder, different distance of diaphragm is considered in the analysis, and corresponding experiential equations are obtained. Also effect of vertically inclined angle of steel web on diaphragm distance has taken into account. The conclusion has provided reference for reasonable design of box girder with corrugated steel webs.