摘要
风速风向联合分布是风荷载基本的特征之一,在进行结构风振疲劳寿命或者风振可靠性分析时,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。本文在已有研究的基础上对风速风向联合分布函数进行进一步研究。根据气象站位置和建筑物位置处梯度风速相同,并假设以上两个位置处风向相同,提出了由气象站位置处的风速风向联合分布函数得到建筑物位置处联合分布函数的方法。本文以广州气象站测得的气象资料作为分析实例,所得的结果可为结构风振疲劳寿命或者可靠性分析提供参考。
The joint distribution of wind speed and direction is one of prime characters of wind load, the distribution function at the location of building have to be acquired before wind-induced fatigue life or reliability of the building is studied. In this paper, the joint probability distribution function was uheriorly studied on the foundation of previous references. The joint probability of wind speed and direction near a civil structure was derived on the basis of datum sampled from weather station on the assumption that the wind direction and gradient wind speed of the weather station is same as that at location of the civil building. The data of wind speed and corresponding direction from Guangzhou observatory were analyzed as a case according to the method discussed in this paper. The conclusions in this paper is useful for analysis of wind-induced fatigue life or reliability.
出处
《结构工程师》
2009年第6期98-103,共6页
Structural Engineers
基金
国家自然科学基金创新研究群体科学基金(50621062)
国家自然科学基金重大研究计划重点项目(90715040)
国家科技支撑计划课题(2006BAJ06B05
2006BAJ03B04)资助
关键词
风速风向联合分布
风振疲劳
joint distribution of wind direction and speed, wind-induced fatigue
