抗风结构疲劳损伤分析

本文对风荷载作用下结构的疲劳损伤进行了分析,对风荷载作用下广义单自由度体系顺风向反应谱进行了计算比较,提出了基于等效窄带过程法的抗风结构疲劳损伤计算方法,并用数值模拟法进行了计算比较,结果表明本文的方法是可行的。

Fatigue Danmge Analysis of Wind--Resistance Structure

The fatigue damage of structures under the wind action is investigated in thispaper. Based on Davenport spectrum of wind load, the response spectrum of generalized sin-gle-degree of freedom system along the wind action is studied, some quantitive and quatitiveconclusions are obtained. The most important one of them is that the response-spectrum ofgeneralized single-degree of freedom system can be simplified as a wide band unimodal spec-trum. A simplified method is proposed, and the results of the present method is comparedwith that of the Monte-Carlo method. The satisfactory agreement between the methods isobserved. This method can also be used to deal with the fatigue damage prediction of multi-degrees of freedom system.