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Optimization of cable-stayed bridges with box-girder decks

机译:箱梁桥斜拉桥的优化设计

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摘要

Box-girder decks are very effective solutions for long span cable-stayed bridges, due to their high torsional stiffness and streamlined profile, which usually lead to a good aerodynamic behaviour. A study on the optimization of such structural system is presented in this paper. The deck is modelled through the assembly of planes of plate-membrane elements. A multicriteria approach is considered for the optimization itself, with constraints on maximum stresses, minimum stresses in stays and deflections under dead load condition. Two illustrative examples are shown.
机译:箱形梁桥架具有很高的抗扭刚度和流线型轮廓,是大跨度斜拉桥的非常有效的解决方案,通常可带来良好的空气动力学性能。本文对这种结构系统的优化进行了研究。甲板是通过板膜单元平面的装配来建模的。对于优化本身,考虑了多准则方法,其中限制了在恒载条件下的最大应力,最小的撑杆应力和挠度。显示了两个说明性示例。

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