Major structural systems are composed of many members and connections, each with individual properties. When the member properties and the loadings applied to the structure are specified in statistical terms, the determination of structural system reliability becomes a problem of multi-fold integration. Since direct integration is feasible only for extremely simple structures, several alternative approaches to the problem have been suggested; either through simplifying the integration process itself or through simplified reliability theory. These approaches are discussed in the context of use of computer programs and computer usage.
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