Abstract
This paper presents a method to determine both every value of various partial safety factors and the range of a variety of concrete structures designed by applying these values, in order to establish a design code based on the Partial Safety Factor Design, taking account of both safety and economy. The method consists of two parts. The first part shows how to define partial safety factors satisfying safety on the condition that the values of the same partial safety factor for the same design variable don't have much disparity in different designs. Another part shows how to estimate a waste of economy caused by applying the same set of values of various partial safety factors to the designs of different concrete structures. In this estimation, we use “Fuzzy Set”.
