AN EXTENDED CALCULATION METHOD OF THE ULTIMATE STRENGTH OF GIRDERS UNDER PATCH LOADING

A large number of studies have been carried out for predicting and calculating the ultimate strength of plate girders under patch loading. In 1983, a modified theory of Roberts and Rockey's one was proposed by Moriwaki et al. with taking account of the web buckling strength. That theory is enable us to predict the most accurate values of the ultimate strength, but is applicable under limited conditions. In this paper, an accurate calculation method based on new mechanism models is developed with taking account of coexisting bending stress and shearing one, which is existing under more usual conditions.