摘要
介绍了验证荷载法的基本原理,讨论了验证荷载法有效性的判别原则.通过在标准正态随机空间中对验证荷载效应的考察,分析了验证荷载法对结构可靠度产生影响的实质.根据数值计算结果,结合理论分析,探讨了影响验证荷载效应的因素及其变化规律,从而得出了验证荷载法的适用范围,并给出了一般情况下能够对结构可靠度评估结果产生有效影响的验证荷载水平下限值.根据得到的结论,指出了在验证荷载法与统计推断法等其它既有结构可靠度评定方法间的内在联系,以及与这些方法联合应用时的局限性.
In this paper, the basic principle of the proof load method is introduced and the ultimate principle of distinguishing the validity of proof load method is discussed. Through the survey of proof toad＇s validity in the space of standard normal distribution, the essential proof load method which can produse effects on structure reliability is analysed. Based on the results of numerical calculation and theoretical analysis, the factors that affect the validity of proof load and the rules of the validity＇s changing are discussed. Accordingly, the scope of application of the proof load method is obtained and the lower limit of a proof load that can have an effective influence on structures reliability in common states is also given. In the conclusion, the inherent contacts between the proof load method and other existing methods structure assessments are given, and the limitation of the proof load method is pointed out.
出处
《水利水运工程学报》
CSCD
北大核心
2009年第2期82-87,共6页
Hydro-Science and Engineering
关键词
验证荷载
有效性
结构可靠度
抗力
proof load
validity
structure reliability
resistance
