降伏曲面を考慮した構造物の捩れ応答

Abstract

Response of an asymmetrical structure due to a ground motion contains some componentfo torsional vibration and a section of frame member of such a structure, is subjected to severalkinds of force such as two components of bending moment, torsional moment and axial force.In this paper, nonlinear torsional vibration of an asymmetric, one-story building structurewith elasto-plastic local joints has been analyzed considering an yield surface of these joints andrelationship between force increments and displacement increments during yielding. And theelasto-plastic behaviour with interaction is compared with the elastic behaviour or elasto-plasticbehaviour without interaction. Maximum responses of translation and of torsion of the structureduring vibration are affected by interaction corresponding to frequency characteristics of excitingforce, especially by interaction of axial force.