铁路桥梁的维护、修缮和改造,取决于对桥梁载荷环境和剩余疲劳寿命的有效评估。在铁路运输网络中,桥梁是一个至关重要的环节,其维修改造的费用,即指修缮和更新改造的直接费用以及运输受到影响所造成的间接费用,每年达数百万美元。 The maintenance, repair and alteration of railway bridges depend on the effective assessment of bridge loading environment and residual fatigue life. Bridges are a crucial link in the rail transport network. The cost of repairs and improvements, which means the direct costs of repairs and upgrades, and the indirect costs of transporting them, affect millions of dollars each year.