小半径大曲率连续弯钢箱梁桥受力性能研究

采用空间有限元方法,结合具体工程对立交工程中常见的小半径大曲率钢箱梁桥进行了研究分析,对其在不同荷载作用下的受力特性做了分析和比较,并对曲线钢箱梁桥的受力特点、剪力滞效应和实用计算方法进行了探讨,并提出了简化计算模式。结构分析表明:对于薄腹箱梁,增设横隔板是减小截面畸变变形的最优方案。可供同类桥梁的设计分析参考。

Study on Bearing Performance of Continuous Steel Box Girder Bridge with Small Radius and Large Curvature

Continuous steel box girder bridge with small radius and large curvature which is common in overpass project was analyzed,with space finite element model based on a case study project and the bridge structure performance under different loads was analyzed and compared,with the loading characters of the curved steel box girder bridge,the shear lag effect and practical calculation method discussed.A simplified calculation method was proposed.The structure analysis showed that for thin-webbed girder,adding cross baffle is the optimal scheme to minimize the cross section deformation.