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Optimum Span Ratio of Cable Stayed-Suspension Bridges

机译:斜拉桥的最佳跨度比

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A development for the new structural system having a superior wind resistance performance may bernthe alternative way for ensuring wind stability. The cable stayed-suspension bridge is one ofrnalternative structural types. In this study, a parametric analysis was performed to examine static andrndynamic behaviour of the cable stayed-suspension bridge according to variation of girder lengthrnsupported by stay cable. The analytical result shows that the reasonable span ratio of stayed spanrnover main span (stayed + suspended span) is between the range of 0.25~0.30. Also, structuralrnperformance of the cable stayed-suspension bridge with the span ratio of 0.25~0.30 is improved byrnmore than 50% in comparison with a conventional suspension bridge. This improvement can lead tornthe reduction for the steel quantity of cable and stiffening girder and the size of anchorage.
机译:具有优异抗风性能的新结构系统的开发可能是确保风稳的另一种方法。斜拉桥是另一种结构类型。在这项研究中,根据斜拉索支撑梁的长度变化,进行了参数分析,以检查斜拉索悬索桥的静态和动力特性。分析结果表明,斜跨距主跨的合理跨距比(斜跨+斜跨)在0.25〜0.30之间。而且,与传统的悬索桥相比,跨度比为0.25〜0.30的斜拉桥的结构性能提高了50%以上。这种改进可导致减少电缆和加劲梁的钢数量以及锚固尺寸的减少。

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