OPTIMUM DESIGN OF CABLE-STAYED BRIDGES CONSIDERING CABLE FAILURE

Noel Soto, C. Cid, A. Baldomir, S. Hernández
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引用次数: 0

Abstract

A methodology to obtain the minimum weight of cables in cable-stayed bridges when a cable fails has been developed. To this end, a multi-model strategy is proposed that takes into account design constraints in both the intact and damaged models. The dynamic effect of the cable breakage is considered by the application of impact loads at the tower and deck anchorages. The methodology is applied to the Queensferry Crossing Bridge, a multi-span cable-stayed bridge with cross stay cables in the central section of each main span. The number of cables, anchorage position on the deck, cable areas and prestressing forces are considered as design variables into the optimization process simultaneously. The fail-safe optimum design results in a different cable layout than the optimized design of the intact structure, with minimum volume increase.
考虑缆索破坏的斜拉桥优化设计
本文提出了斜拉桥中斜拉桥索失效时的最小索重计算方法。为此,提出了一种同时考虑完好模型和损坏模型设计约束的多模型策略。通过在塔身锚固处和甲板锚固处施加冲击荷载,考虑了索断裂的动力效应。该方法应用于皇后渡口大桥,这是一座多跨斜拉桥,每个主跨的中央部分都有交叉斜拉索。同时将索数、桥面锚固位置、索面积和预应力作为设计变量纳入优化过程。与完整结构的优化设计相比,故障安全优化设计的电缆布局不同,但体积增加最少。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
1.20
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