基于概率疲劳累积损伤理论的构件抗力衰减分析

本文首先研究了疲劳载荷作用下你件抗力随损伤发展而衰减的规律，建立了抗力衰减的模型；然后应用概率疲劳累积损伤理论和随机损伤发展模型，在考虑载荷的随机性和损伤发展本身固有的随机性的基础上，得到了构件抗力衰减过程的统计矩，为分析结构在使用期间的服役可靠性提供了初步可用的结果。

Analysis for the Resistance Reduction of Structural Members Based on the Theory of Probabilistic Fatigue Damage Accumulation

In this paper, the reducing discipline of resistance in the structural members relating to the damage accumulation under the fatiguc cyclic load was studied.The reductive model of resistance was also established. Then, on the basis of the theory of the probabilistic filtiguc damage accumulation and a stochastical modcl of damage development, tile formulas for statistical moments of resistance of structural members were derived by taking the randomness of dynamic load and the intrinsic randomness of damage developing process into considcration. Thcrcforc, this paper will provide preliminary basis for the scrvice reliahility analysis of structures.