Simplified finite element modelling of non uniform tall building structures comprising wall and frame assemblies including P-

The current investigation has been conducted to examine the effect of gravity loads on the seismic responses of the doubly asymmetric, three-dimensional structures comprising walls and frames. The proposed model includes the P- effects induced by the building weight. Based on the variational approach, a 3D finite element with two nodes and six DOF per node including P- effects is formulated. Dynamic and static governing equations are derived for dynamic and buckling analyzes of buildings braced by wall-frame systems. The influences of P- effects and height of the building on tip displacements under Hachinohe earthquake record are investigated through many structural examples.