Abstract
This paper presents a proposal of an extended slope-deflection method to analyse elasto-plastic rigid frame systems in consideration of the shear deformation of joints. The authors deal with the analysis in the region of small deformation, assuming that the joint panel behaves as an idealized elasto-plastic system for the shearing force and that the member for the bending moment. The yield process is classified into two types as follows : (i) The joint panel yields for the shear in the first place. (ii) The column or beam yields for the bending moment first. For the both of the types, formulae are derived, and examples of portal frames are illustrated.
