Assessing the Effect of Damping in Estimating the Engineering Parameters in Steel Frames

Abstract

In investigating seismic response of the structures through time history analyses in linear and nonlinear state, estimating the damping of the structure is of a high significance. Rayleigh damping is mostly used by the users among software which are used for dynamic analyses of structures. Rayleigh Damping involves the combination of two terms: the appropriateness of the structure as well as its stiffness. Stiffness of the structures also includes elastic stiffness and stiffness of the structure in a non-linear state. This article has tried to investigate the effect of different damping matrixes in the seismic analyses of the bending frames. The findings show that the use of Rayleigh damping in estimating different seismic responses such as relative changes in position, basic cut and ceiling acceleration will lead to inappropriate responses.