Abstract
In Japan, Allowable Stress Design (ASD) method has been used for more than 30 years. However, Limit State Design (LSD) method is now global standard design procedure. Since the ultimate flexure strength of composite girder can attain to the plastic moment, which is considerably higher than the yield moment, benefit from introducing LSD is apparent. On developing LSD, correct evaluation of ultimate strength is one of the important issues. In this paper, experimental results on ultimate coupled flexure and shear strength are given. Furthermore, citing our previous analytical results on the ultimate flexure strength, we proposed a method for evaluating flexure, shear and coupled strength of composite girders.