SECOND-ORDER RELIABILITY METHOD IN PARALLEL STRUCTURAL SYSTEMS

The first-order second-moment method is fundamental in structural reliability analysis, its accuracy depends upon the nonlinear extent of performance functions around checking point. To improve the accuracy, the influence of second order of performance hations should be considered. Many relevant studies centralized in element reliability and few deal with system reliability because its complexity. For this reason, the second-order algorithms of structural systemreliability is eded and computing formula is presented.