考虑土壤-结构共同作用影响的双曲冷却塔可靠度  

EFFECT OF SOIL-STRUCTURE INTERACTION ON RELIABILITY OF HYPERBOLIC COOLING TOWERS

作　　者：廖汶[1] 卢文达[1] 刘人怀[1] 陈忠延[1] 

机构地区：[1]同济大学

出　　处：《土木工程学报》1998年第1期52-59,共8页China Civil Engineering Journal

基　　金：国家自然科学基金资助项目

摘　　要：本文建立了对风荷载、自重和温度荷载组合作用下的双曲冷却塔结构进行可靠度分析的半随机过程模型,研究了考虑土壤-结构共同作用、塔底用连续弹性支承和离散支柱所造成的可靠度评估差异.运用等效静态的方法,考虑湍流动态风荷载响应.将动态随机过程模型转化为静态随机变量模型.TR荷载组合规则被用来考虑各荷载效应之间的关系.以广东茂名90米双曲冷却塔作为算例,数值结果表明不考虑共同作用的设计是保守的.A semi-stochastic process model of reliability was established for hyperbolic cooling towers subjected to combined loadings of wind force, deadweight and temperature action. The effect of soilstructure interaction and the difference in reliability evaluation between tower base supported on continuous plastic supports and on discrete columns were studied. In consideration of the gust factor, an equivalent static process was employed to convert the dynamic model to static model. The TR load combination rule was used to consider the relations between load responses. A numerical example was made on a 90m in height cooling tower in Maoming of Guangdong province. The calculated results show that the design turns to be conservative in case the interaction effect is not taken into account.

关 键 词：冷却塔 土壤-结构 可靠度 共同作用 火力发电厂 

分 类 号：TM621.7[电气工程—电力系统及自动化] TU279.741[建筑科学—建筑设计及理论]