摘要
铁路提速会较大程度地降低小跨度旧钢梁的疲劳承载力。在华东５条铁路干线中，解放前建造的中、小跨度旧钢梁约占钢梁的三分之一。提供了这五条干线的历年运量资料及其中两座桥梁钢材的力学性能试验资料；收集了欧美和日本有关旧铆接结构疲劳的试验成果；推荐了三种疲劳检算公式用以估算旧铆接钢梁的疲劳寿命。
Railway velocity-upgrading will reduce the fatigue strength of the old short-span steel girders. About one-third of the steel girders in five railway lines of East China are short or medium span steel girders erected before 1949. The historical transportation of the railway lines is summarized, and the tested mechanical properties of steels from two bridges are also given. The relevant experimental results for the fatigue strength of the existing riveted structures of Europe, the United states and Japan are reviewed. Three fatigue equations are recommended to evaluate the fatigue strength of the existing riveted steel girders.
基金
铁道部科技研究开发计划项目
关键词
铆接梁
疲劳强度
疲劳寿命
铁路桥
旧钢梁
riveted girders, fatigue strength, estimation of fatigue life
