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反复应力是由重复荷载所引起的,它能够引起钢材的疲劳问题,疲劳问题是当材料在传力途径有疵点处或局部内部缺陷时,材料内部逐步形成裂纹扩展到最后断裂的一种现象。由于桥梁的施工方法、施工技术、施工质量、材料本身的缺陷以及车辆超载等原因,国内外许多桥梁都会发生疲劳破坏。文章主要通过相关知识,谈了作者对钢桥疲劳这一问题的认识和理解。
Repetitive stress is caused by repeated load, which can cause the fatigue of steel. The fatigue problem is a phenomenon that the material gradually expands to the final rupture when the material is defective in the transmission force or local internal defects. Due to the construction methods of bridge, construction technology, construction quality, the defect of material itself and the overload of vehicles, many bridges at home and abroad will cause fatigue damage. The article mainly through the relevant knowledge, talked about the author of steel bridge fatigue awareness and understanding of this issue.