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根据锚固度,斜拉桥可分为:自锚式、全锚式及部分锚固式等三种;而悬索桥则可分为自锚式及全锚式两种。以简化了的结构图式作为解析的模型,推导出缆索用钢以及水平结构用钢的计费公式。对各类桥梁的结构效率进行了比较。自重的影响、不同的力学性能的影响以及所用材料的单价差别均予以考虑。从而发现辐射型“缆索、部分锚固式斜拉桥的最有效跨度可达6,000ft(1846m)。
According to the degree of anchorage, cable-stayed bridges can be divided into three types: self-anchored, all-anchored and partially anchored; and suspension bridges can be divided into self-anchored and fully anchored. Taking the simplified structural scheme as the analytical model, the formulas of steel for cable and steel for horizontal structure are deduced. The structural efficiency of various types of bridges were compared. The influence of self-weight, the influence of different mechanical properties and the unit price difference of the materials used are all taken into consideration. As a result, it was discovered that radiated "cables, some anchored cable-stayed bridges have a maximum effective span of up to 6,000 ft (1,846 m).