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工程实践证明,疲劳失效是吊杆破坏的主要形式。应用Palmgren-Miner线性累积损伤理论,阐述了吊杆疲劳所涉及的主要理论和分析方法,研究了拉萨柳梧大桥吊杆疲劳设计寿命,计算了吊杆的疲劳设计寿命,讨论了该桥吊杆服役一定时期后的疲劳剩余寿命预测方法。
Engineering practice shows that fatigue failure is the main form of boom damage. Based on Palmgren-Miner theory of linear cumulative damage, the main theories and analytical methods involved in boom fatigue are expounded. The fatigue design life of boom in Lhasa Liuwu Bridge is studied. The fatigue design life of boom is calculated. Fatigue life expectancy after service for a certain period of time.