结构风振的概率疲劳累积损伤

Probabilistic Fatigue Cumulative Damage of Wind-Resistance Structures

本文通过考虑脉动风压的随机过程性,利用风荷载的规范标定方法和结构疲劳试验结果,从结构风振随机反应分析着手,提出了基于疲劳累积损伤机制的抗风结构疲劳可靠性和寿命估计的分析方法,并通过一典型单自由度结构说明了此方法的应用。

In this paper,by simulating the gust force as a stationary random process,using the wind load speci-fied in the code and fatigue experimental results and starting from the random response analysis,an ana-lytieal method is respectively presented for the analysis of factigue reliability and estimation of fatigue lifeof a structure to the wind based on the fatigue cumulative damage mechanisms.Then the method presentedin this paper is applied to the analysis of a typical single-degree-of-freedom steel structure to the wind.