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独塔对称斜拉桥是工程中常见的桥型,其结构形式多样。作者以金州滨海桥为例,从无索区长度、高跨比设计参数着手,针对非协作体系,利用MidasCivil大型桥梁分析软件进行参数分析。分析上述参数变化对此类斜拉桥受力变形及经济性能的影响,得出几点结论,可对此类桥型在拟定结构尺寸、判断结构受力合理性时作为依据:无索区长度的合理取值宜控制在主跨L的0.05～0.1倍;塔高与主跨比合理取值应为1/2.2～1/2.7。
Single-tower symmetrical cable-stayed bridge is a common type of bridge, its structure and diverse. Taking Jinzhou Binhai Bridge as an example, the author starts with the design parameters of length and span ratio of no-load zone, and analyzes the parameters of the non-cooperation system by using MidasCivil large-scale bridge analysis software. The influence of the above parameters on the mechanical deformation and economic performance of such cable-stayed bridges is analyzed. Some conclusions are drawn, and the conclusions can be drawn as follows: Reasonable value should be controlled in the main span L of 0.05 to 0.1 times; tower height and the main span rationally value should be 1 / 2.2 ~ 1 / 2.7.