中介状态时风荷载作用下输油气管桥结构的可靠性分析  

On Reliability Analysis of the Pipeline Bridge Structure under the Function of Wind Load in Intermediate State

作　　者：孙鸿玲[1] 周勇[1] 张鹏蒲 万丽[1] 沈小伟[1] 

机构地区：[1]西南石油大学建筑工程学院,四川成都610500

出　　处：《石油工业技术监督》2007年第10期33-36,共4页Technology Supervision in Petroleum Industry

基　　金：国家自然科学基金(50678154);高等学校博士学科点专项科研基金(20060615003);油气藏地质及开发工程国家重点实验室开放基金(PLN0113);四川省教育厅自然科学基金重点项目(2006A121)

摘　　要：在实际工程中,结构通常应具有"安全-中介-失效"三级工作模式,这里的"中介"即为"故障"。依据具有中介状态的结构可靠性分析原理,以及风荷载的概率服从极值Ⅰ型这一条件,建立了风荷载作用下管桥结构的可靠性分析方法。应用此方法对一管桥结构进行了分析,求出了该结构在风的静力作用下的安全概率(可靠度)PR、中介概率PM和失效概率PF,它们联合起来构成可靠性向量[PR,PM,PF]。该可靠性向量全面描述了结构的可靠性状态。In actual engineering, structures commonly work with 3-level working mode of ＂safety, intermediate also called ‘fault＇, and failure＂. According to the reliability analysis principle of structures with intermediate state and the condition of the probability distribution of wind load being subordinated to the extreme value No.1, the method has been found on the probability analysis of pipeline bridge structure under the function of wind load. By the use of this method, the analysis has been made about the pipeline bridge structure, thus getting the safety probability （reliability）PR, intermediate probability PM and failure probability PF of the structure under the static function of wind. The combination of these factors has formed the reliability vector [PR, PM, PF], which completely describes the reliability state of the pipeline bridge structure.

关 键 词：中介状态 管桥 可靠性向量 概率分布 风荷载 

分 类 号：TE973[石油与天然气工程—石油机械设备]