Abstract
The ductility and energy dissipation capacity of a seismic resistant frame structure depends upon the assumed Collapse mechanism. And the type of the Collapse mechanism is much influenced by the randomness of yield strengths of members. In this paper, the yield strengths of members are considered as random variables, and the reliability-based minimum weight design method specifying the desirable Collapse mechanism is presented. Then the influence of the randomness of yield strengths upon the frames by the optimum design is studied.
