抄録
Many studies have been made of optimum reliability design of structural systems. However, they are limited to simple types of structures. This main reason is no efficient methods are available for calculating failure probability of structures. Another reason is due to the fact that, in spite of the high development of structures for making structural analysis by using digital computers, they make their effectiveness decrease for complex structures.
In the present paper, a design method of calculation to solve these problems have been proposed and incorporated into the optimum reliability design. The optimum reliability design problem was treated to determine a structure having a minimum weight or cost under the constraint on the allowable probability of each structural elements.
In this approach, a stochastic finite element method is applied to structural analysis and a reliability analysis of composite materials accounts for statistical variation of material strengths. In addition, numerical examples are presented to demonstrate the validity of the proposed method.
