某大桥扣索钢铰线断丝失效分析  

Failure Analysis on the Fractured Cable of a Bridge in Work

作　　者：杨世柏[1] 廖红卫[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430063

出　　处：《机械工程材料》2003年第8期51-54,共4页Materials For Mechanical Engineering

摘　　要：对大桥施工中发生的扣索钢绞线断丝进行了成分、显微组织、断口及裂纹分析,找出了断裂原因,采取了措施。分析结果表明,扣索钢绞线断丝的断裂性质为疲劳断裂,其裂纹源的产生是由于扣索在索鞍轮处弯曲过大,内侧受到较大交变接触应力所致。风振及反复张拉调整,使裂纹不断扩展。The composition of the fractured cable was measured, the microstructure, fractures and cracks were observed. The results show that it was a fatigue fracture. The cracks originated from inside of curved cable at the wheel because of contact fatigue at the curve where larger stress existed. The crack propagated under windy vibration and adjustment of the cable.

关 键 词：失效 钢绞线 接触疲劳 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]