Integrals of random fields treated by the model correction factor method

摘要

The model correction factor method (MCFM) is used in conjunction with the first-order reliabilityrnmethod (FORM) to solve structural reliability problems involving integrals of non-Gaussian random fields. Thernapproach replaces the limit-state function with an idealized one, in which the integrals are considered to bernGaussian. Conventional FORM analysis yields the linearization point of the idealized limit-state surface. Arnmodel correction factor is then introduced to push the idealized limit-state surface onto the actual limit-staternsurface. A few iterations yield a good approximation of the reliability index for the original problem. Thisrnmethod has application to many civil engineering problems that involve random fields of material properties orrnloads. An application to reliability analysis of foundation piles illustrates the proposed method.