结构风振失舒率的模糊评价模型研究  

STUDY ON A FUZZY PROBABILITY EVALUATION METHOD OF ESTIMATING WIND-INDUCED VIBRATION DISCOMFORT OF BUILDINGS

作　　者：汪大洋[1] 

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《低温建筑技术》2013年第6期143-146,共4页Low Temperature Architecture Technology

基　　金：广东省自然科学基金项目(S2012040007215);中国博士后科学基金第52批项目(2012M521604);广东省教育厅科研项目(2012LYM0104)

摘　　要：高层结构风振舒适度是结构抗风设计的重要参数,为量化结构风振加速度与舒适度之间的关系,本文提出结构风振失舒率概念,并引入模糊概率理论建立了高层结构风振失舒率模糊预测评价方法,建立了采用升半正态形、升岭形、升半梯形和升半Γ形四种隶属度函数计算高层结构风振失舒率模糊概率评价模型,实现了高层结构风振作用下产生失舒感人数及失舒率的量化计算问题。结果表明所提出的模型对风振作用下结构产生失舒感人数的预测是可行的,尤以升半正态形和升岭形隶属度函数建立的预测模型的计算结果最佳。Wind-induced vibration comfort is an important parameter in structural wind resistant de- sign of high-rise building. This paper focused on studies of how to establish the quantitative relationship between structural acceleration response and vibration comfort. To achieve this, concept of discomfort ra- tio of wind-induced vibration was proposed and fuzzy probability theory was introduced. Four kinds of as- cending membership functions, normal-, ,ridge-, trapezoidal- and F-shaped membership functions, were adopted to establish the fuzzy probability model. The prediction effect of the fuzzy probability model was compared firstly with the existing results by other researchers to verify the reliability of the model. Re- suits show that the discomfort ratio of wind-induced vibration can be predicted rationally using the fuzzy probability model. Relationship between the annoyance ratio and structural vibration acceleration can be well calculated and solved, especially for the models with the normal and ridge-shaped membership func- tions.

关 键 词：建筑结构 模糊概率 风振 失舒率 评价模型 

分 类 号：TU973.213[建筑科学—结构工程]