在时变结构可靠度领域中有必要澄清一个错误概念  

CLARIFICATION OF A WRONG CONCEPT IN THE FIELD OF TIME-VARYING STRUCTURAL RELIABILITY

作　　者：秦权[1,2] 贺瑞[1] 杨小刚 

机构地区：[1]清华大学土木系,北京100084 [2]中国交通建设集团桥梁技术公司

出　　处：《工程力学》2009年第8期201-204,共4页Engineering Mechanics

基　　金：国家重点基础研究发展规划(973)项目"灾害环境下重大工程安全性的基础研究"(2002CB4127009)

摘　　要：根据严格的随机过程理论,该文证明:国内沿用的所谓的‘动态可靠指标’并非我国结构设计规范所考虑的结构可靠指标,这个概念即忽视了国外更早开始、也一直在进行的相关研究,也违背了随机过程理论的基本概念。鉴于国内旧桥安全性问题日益严重,这个错误概念误导了很多研究者,使他们对旧桥安全性评定做出错误结论,直接影响了我国旧桥的安全,指出及早澄清这个错误概念的必要性。Strictly following the theory of stochastic processes, it is indicated that the so-called dynamic reliability index used domestically is not the reliability index in the codes for the structural design. The former, an ambiguous concept, came from ignorance of abundant references of international pioneer studies and ignorance of the theory of stochastic processes. For the recent situation of safety problems induced by more and more aged bridges in China, the wrong concept misleads quite few researchers in their works on safety evaluation of aged bridges and leads to wrong conclusions of safety. Now is the time to clarify the wrong concert for avoiding its negative effects on aged bridge maintenance works.

关 键 词：时变可靠度 随机过程 可靠指标 首次超越 退化桥梁 

分 类 号：TB114.3[理学—概率论与数理统计]