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国内外已建的铁路悬索桥都是公铁两用,并且都是轻型列车,原因就在于悬索桥属柔性体系,刚度太小。根据铁路悬索桥的已有设计研究情况,本文对铁路悬索桥较为合理实用的刚度指标体系做了调研分析。按照建议的刚度指标,对悬索桥的边中跨比、垂跨比、高跨比,宽跨比等参数做了对比分析,和公路悬索桥对比,总结提出了适合铁路悬索桥的一些设计参数。最后简单介绍了不同结构体系悬索桥对结构刚度的贡献及存在的问题。可供设计者参考借鉴和进一步研究。
The railway suspension bridges built at home and abroad are both dual-purpose railroads and light trains. The reason is that the suspension bridge is a flexible system and its rigidity is too small. According to the existing design and research of railway suspension bridge, this paper makes a research and analysis on the more reasonable and practical stiffness index system of railway suspension bridge. According to the proposed stiffness index, the parameters such as span ratio between sides to span, span ratio, span ratio, span ratio and so on are comparatively analyzed. Compared with the suspension bridge of the highway, some design parameters suitable for the railway suspension bridge are proposed. Finally, the contribution and existing problems of the suspension bridge with different structural systems to structural rigidity are briefly introduced. For designers reference and further study.