SHAPE FACTOR OF MULTI-STORY MOMENT-RESISTING STEEL FRAMES WITH UNIAXIAL ECCENTRICITY, IN WHICH THE TYPE OF ECCENTRICITY IS MODELLED WITH UNBALANCED STIFFNESS AND SHEAR STRENGTH, CONSIDERING THE ELASTIC-PLASTIC RESPONSE

Abstract

This paper proposes an evaluation method for the eccentricity shape factor (F_e) of moment-resisting steel frames. The model used is a multi-story building with uniaxial eccentricity, for the unbalanced stiffness and shear strength characteristics are simulated. The evaluation is performed by individual calculations for the deformation of every story as the deformation angle is increased to its limit. The results of elastic-plastic 3D analysis show that the evaluation method for F_e provides an appropriate representation of the influence of eccentricity.