风速风向联合分布对结构风致疲劳寿命可靠性的影响

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (12) : 167-171.

论文

风速风向联合分布对结构风致疲劳寿命可靠性的影响

王钦华;顾明

作者信息 +

Influence of joint distribution of wind speed and direction on wind-induced fatigue life reliability

WANG Qin-hua; GU Ming

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文章历史 +

摘要

在进行结构风振疲劳寿命可靠性分析时，需要先求得建筑结构所在位置处的风速风向联合分布函数。本文首先对建筑结构附近两个气象站的气象资料进行统计分析，得到建筑结构位置处两个不同的风速风向联合分布函数，然后分析了不同的风速风向联合分布函数对一实际结构系统风振疲劳主要失效模式以及结构系统风振疲劳失效概率的影响。本文分析表明：用不同的风速风向联合分布函数计算风振疲劳寿命时会得到不同数目的主要失效模式，并且对结构系统的风振疲劳失效概率影响较大。

Abstract

The joint distribution function of wind speed and direction at the site of investigated structures should be obtained before the analysis of wind-induced fatigue life of structures is performed. In this paper, joint probability distribution functions of wind speed and direction is first derived on the basis of wind datum of two weather stations near a real structure. Then effects of the different distribution functions of wind speed and direction on the wind-induced failure modes and system failure probability of the structure are studied. The analysis results show that different distribution functions of wind speed and direction could result in different failure modes for the calculation of wind-induced structural fatigue life, and furthermore have great influences on structural fatigue failure probability.

导出引用

王钦华;顾明. 风速风向联合分布对结构风致疲劳寿命可靠性的影响[J]. 振动与冲击, 2009, 28(12): 167-171

WANG Qin-hua;GU Ming. Influence of joint distribution of wind speed and direction on wind-induced fatigue life reliability [J]. Journal of Vibration and Shock, 2009, 28(12): 167-171