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采用金相显微镜、扫描电镜等分析手段,对82MnA钢索断裂原因进行分析。结果表明:钢筋周围存在的腐蚀环境和持久拉应力的共同作用导致的应力腐蚀破坏是钢索断裂的主要原因。
The reason of fracture of 82MnA cable was analyzed by metallographic microscope and scanning electron microscope. The results show that the stress corrosion damage caused by the combined effect of the corrosion environment and the lasting tensile stress around the reinforcement is the main reason for the cable fracture.