Abstract
The purpose of this paper is to determine quantitatively the statistical characteristics of ultimate strength and rotation capacity of steel members, according to experimental data. The resistances are given in the usual evaluation of ultimate strength and in the equivalent ultimate strength to the energy absorption determined by rotation capacity for anti-seismic design. This paper presents the design processes based on the second moment method by these two evaluations of resistances. The distributions of resistances are shown by the mean values and the standard deviations which are calculated from the statistical management of experimental data. In the case of columns and beams, the mean values are given by regression analysis and the standard deviations are obtained from the relations of experimental data and regression curve. In the case of beam-columns, the resistances are statistically given by means of using some kinds of experiential correlative formulae. The mean values and the standard deviations are obtained from the correlative formulae that is the most conformable to experimental data.
