This paper deals with the optimum design of beams in multi-storey steel frames using the recently proposed LRFD criteria. The results are compared with those obtained using the conventional plastic design criteria. The optimization problems which are nonlinear in nature are either solved using an appropriate nonlinear optimization technique or linearized and solved by the simplex method. Numerical examples presented consider the design of three-bay 9 storey, 17 storey and 26 storey frames.
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Thevendran et al. (1985) studied this question.
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