Abstract
Probabilistic structural design is a degree of difficulty greater than deterministic design and effectively is only tractable using a computer. This paper outlines one approach to the design of framed structures subject to random loading. In particular stochastic approximation is used iteratively to improve the value of the optimality criterion, leading to a guaranteed optimal solution in the limit. Two framed structures are used to illustrate the computations which are performed in conjunction with a random number generator to simulate the probabilistic aspects of the loading. The approach is independent of the probability model assumed for the loading. It is straightforward to implement and has good solution convergence characteristics.
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