无背索斜拉桥结构优化分析
首发时间:2020-01-02
摘要:无背索斜拉桥作为新兴的景观类桥梁,倾斜的桥塔依靠柔性的拉索来维持结构的稳定,给人以强劲有力的直观感受。本文以纯钢筋混凝土结构的无背索斜拉桥-迎宾大桥为背景,采用MIDAS /CIVIL有限元软件,考虑主塔横梁数目的变更,建立优化前后的空间分析模型,保证成桥索力不变的前提下,分析优化前后的成桥阶段主梁、主塔的应力,位移变化,确定优化后的结构更加合理,受力更加明确。
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Structural optimization analysis of cable-stayed bridge without back cable
Abstract:The structure of cable-stayed bridge without back rope is a new breakthrough compared with the conventional cable-stayed bridge.The example in this paper is the yingbin bridge,a cable-stayed bridge without back cables under construction,by using the spatial finite element analysis software MIDAS / CIVIL.The stress, displacement and cable force of main girder and main tower in the bridge forming stage before and after optimization are analyzed,in order to determine the optimized model structure is more reasonable and the force is more definite.
Keywords: cable-stayed bridge without back stay optimization finite element analysis
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