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混凝土自锚式悬索桥以造型独特、经济性好、适应性强而成为城市中小跨径景观桥梁极具竞争力的桥型之一。文章以某混凝土自锚式悬索桥为工程背景,首先运用等代简支梁法推导出合理成桥线形,而后运用空间非线性有限元程序对该桥进行了空间计算,对其受力性能进行研究,并分析矢跨比、主梁拱度等参数对结构的影响。结果表明,随着主缆矢跨比的减小,主缆拉力增大,主梁压力增加,结构的整体刚度减小;主梁拱度提高了结构的刚度。结论可以为该种桥型结构的设计提供参考。
Concrete self-anchored suspension bridge with unique shape, good economy, adaptability and become the city’s small and medium-span landscape bridge one of the most competitive bridge. In this paper, based on a concrete self-anchored suspension bridge as the engineering background, firstly, the reasonable bridge shape is deduced by using the equivalent simply supported beam method, then the space is calculated by using the nonlinear finite element program and the mechanical performance of the bridge is studied , And analyzed the influence of span-to-span ratio, main beam camber and other parameters on the structure. The results show that with the reduction of the span-to-span ratio of the main cable, the tension of the main cable increases and the pressure of the main girder increases, and the overall stiffness of the structure decreases. The main girder camber improves the structural rigidity. The conclusion can provide reference for the design of the bridge structure.