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经济跨长确定之后,就可以对桥梁上、下部结构和基础进行详细设计。这时,考虑作用于桥梁上荷载和作用力的方式,将影响结构的最终造价和安全。如果设计荷载或设计荷载组合比以往桥梁上的荷载重很多,要得到节省只好通过其他方法来弥补。另一方面,如果实际荷载超过了容许量,结构的安全就要受到影响。
Once the economy has been established, detailed design of the upper and lower structures and foundations of the bridge can be carried out. At this time, considering the way acting on the loads and forces on the bridge will affect the final cost and safety of the structure. If the design load or design load combination is much heavier than the load on the bridge in the past, the savings will have to be made up by other means. On the other hand, if the actual load exceeds the allowable amount, the safety of the structure will be affected.