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采用空间有限元方法,结合具体工程对小曲率半径钢箱梁桥进行研究,对比分析其不同截面形式下的受力特性,并对曲线钢箱梁桥的受力特点、剪力滞效应和最优截面方案进行探讨。分析表明:对于大跨度薄腹钢箱梁桥,增设横隔板和必要的纵肋是减小截面畸变变形的最优方案。同时,对于此类曲线桥应重视必要的抗扭支座设置。
The spatial finite element method and the concrete engineering are used to study the small curvature radius steel box girder bridge. The stress characteristics under different cross-section forms are compared and analyzed. The stress characteristics, shear lag effect, Excellent cross-section program to explore. The analysis shows that for the long-span thin-web steel-reinforced concrete box girder bridge, the addition of the diaphragm and the necessary longitudinal ribs is the best solution to reduce the distortion of the section. At the same time, the bridge should pay attention to the necessary settings for torsion bearing.