论文部分内容阅读
一、结构可靠性理论的发展结构设计所用到的许多基本数据(荷载,抗力,尺寸,……)都是随机变量。对于它们的变异性,人们早就给予注意,既已积累了若干数据(例如,钢材屈服点,早就知其保证率95%的值),也已有一些在设计中综合考虑的经验。可是,怎样将所涉及的基本数据综合起来,借能将结构失效概率(保证率等于1.0减这失效率)算出来,这却是近20年的事(C.A.Cornell在1967年提出二次矩算式,A.M.Hasofer和N.C.Lind在1974年给予改进)。能推算
First, the development of structural reliability theory Many of the basic data (load, resistance, size, ...) used in structural design are random variables. It has long been noted for their variability that a number of data have been accumulated (for example, yield point of steel, which has long been known to have a 95% guaranteed value) and some experience in design. However, how to combine the basic data involved to calculate the probability of structural failure (guarantee rate equal to 1.0 minus the failure rate) is almost 20 years (CACornell proposed the second moment formula in 1967 AM Haasofer and NC Lind improved in 1974). Can calculate