【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。更多还原

【Abstract】 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.更多还原