Keisuke OGURO

Effect of Strength Formulae and Partial Safety Factor on Ultimate Limit State of Plated Girders

Masatugu NAGAI, Eiji IWASAKI

The main purpose of this study is to offer information for establishing limit state design method (LSD) and load and resistance factor design method (LRFD) of plated girders. Assuming various formulae for evaluating bending and shear strengths and partial safety factors, ultimate limit state of the steel-concrete composite plated girder under hogging bending moment was examined. As for the partial safety factor, only the load factor was dealt with and varied. Because, comparing with the other factors, relatively large value has been used. The followings are main results obtained from this study, (1)The difference of strength evaluated from formulae stipulated by Japan Highway Bridge Specifications, Japan Society for Civil Engineers and proposed by Prof. Mikami was minor, (2)Depending on the safety factor, it is easy to imagine, more economical solution is possible, (3)Selection of the partial safety factor plays decisive role on dimension of the plated girder.