DESIGN FORMULAE OF POSITIVE FLEXURAL STRENGTH OF COMPOSITE I-SECTIONS CONSIDERING VARIATION OF MATERIAL PROPERTIES

Abstract

Japanese design code for highway bridges has adopted the allowable stress design concept which requires the structures to have elastic behavior under the given design conditions. On the other hand some design codes in foreign countries include the plastic design concept, which can contribute to the cost reduction of steel bridges. In this study, considering strength and some other parameters in stress-strain relation of materials as random variables, Monte Carlo simulation is carried out in order to examine their influence on the probability distribution of positive flexural strength of composite compact sections, and the design formulae of positive flexural strength considering variation of material strength are proposed.