动态风压极值分析中峰值因子取值的探讨  

Discussion on the Value of the Peak Factor in the Analysis of Dynamic Pressure Extremum

作　　者：柯世堂[1] 赵林[1] 葛耀君[1] 周玉芬[1] 许林汕[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《武汉理工大学学报》2010年第6期11-15,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金委重大研究计划重点研究项目(90715039);科技部重大科技项目(2008ZX06004-001)

摘　　要：针对传统风压极值估计方法存在的缺陷,提出了适用于单个样本随机过程的极值估计法—全概率逼近法。通过对某多塔组合冷却塔风洞测压试验结果进行分析表明,全概率逼近法避开了对随机过程的高斯分布假定,对于呈现明显非高斯分布的随机过程,相比传统的极值估计方法能得到较好的结果;由于群塔和周边建筑的干扰效应,壳体表面不同区域其脉动风压变化幅度不同,可以通过采用不同的峰值因子来考虑其脉动风效应影响。This text firstly recommends the appropriate method of gauss distribution based on random extreme value theory,then introduces principle and method of probability method of the goal based on reliability theory in detail.The result of pressure test of four towers in ultra large-scale cooling tower through the several methods is discussed.The analysis shows,because of the effection of towers around and peripheral buildings,its extreme value of wind responses in different areas of surface of tower are different,A same value to consider its pulse wind＇s effection should not be taken;The result may be partial to unsafely when adopting our country＇s peak factor to calculate.

关 键 词：峰值因子法 Sadek-Simiu法 全概率逼近法 风压极值 冷却塔 风洞试验 

分 类 号：TU279.7[建筑科学—建筑设计及理论]