拟建结构和现有结构的抗力概率模型  

Probabilistic Models for Resistance of Structures in Design and in Service

作　　者：姚继涛[1] 赵国藩[2] 浦聿修[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]大连理工大学土木系,大连116023

出　　处：《建筑科学》2005年第3期13-15,7,共4页Building Science

基　　金：国家自然科学基金资助课题(59908009)

摘　　要：完善了结构抗力的随机过程概率模型,对独立增量过程概率模型作了更深入的阐述,并论述了抗力概率模型应满足的基本条件。针对拟建结构和现有结构之间的差别,文中还建立了不同结构具体的抗力概率模型,在现有结构抗力的概率模型中引入了未确知量,以反映人们在认识现有结构当前抗力时的未确知性。文中的抗力概率模型不仅解决了自相关系数难以统计的困难,而且在结构可靠性的分析中可以得到偏于保守的结果。This paper advances the probabilistic models for the structural resistance, and expoundes the probabilistic models of independent increment process and the basic conditions the models should accord with. The specified probabilistic models for structural resistances were put forward in connecting with the differences between both structures in deign and in service, which introduce the uncertainty variables into probabilistic models for the in-service structural resistance to reflect the uncertainty of cognition on the in-service structural resistance at present. The probabilistic models of structural resistance in this paper surmount the difficulties due to in getting the coefficient of self-correlation, statistics and lead conservative results in the analysis of structural reliability.

关 键 词：概率模型 独立增量过程 结构抗力 自相关系数 结构可靠性 随机过程 基本条件 未确知性 

分 类 号：O211.62[理学—概率论与数理统计] TP391.41[理学—数学]