Author(s)

P. Papadopoulos, P. Lazaridis & A. Tassopoulos

Abstract

Numerical experiment on influence of resonance on seismic response of buildings with low damping P. Papadopoulos, P. Lazaridis, A. Tassopoulos Department of Civil Engineering, Aristotle University of ~hessaionih, Greece. Abstract A numerical experiment is performed on an eight-story shear building model subjected to a horizontal triangular pulse of ground. For dynamic analysis, the step-by-step algorithm of constant average acceleration of Newmark is used. With the help of simple approximations of the two extreme eigenfrequencies, we can give to the model any value of Rayleigh damping which does not vary largely from one mode to another. First, a low relative damping < = 0.02 is tried. The ground pulse, in about 0.2sec, is transmitted up to the top. After about 2.0sec, it seems that the structure becomes quiet. However, small vibrations remain with amplitudes less than l.Omm. These waves propagate over the height of cantilever beam, reflect at its two ends and then interfere to each other. Gr

Keywords