COLUMN INTERACTION EFFECT ON PUSH OVER 3D ANALYSIS OFIRREGULAR STRUCTURES

摘要

This work presents results of push over analyses to assess the effect of interaction of bending momentsand axial loads in columns of low-rise frame buildings with torsion. Translation and rotation push overcurves, as well as frame relative displacements, were computed with two type of 3D push over analyses.The first type (complete analysis) considers nonlinear interaction between bending moments and axialloads in columns, while the second (simple analysis) neglects this interaction and assumes columns ofintersecting frames as two independent elements. Results indicate that simple analyses can significantlyunderestimate building lateral displacements at ultimate base shears.