Abstract

LUEVANOS, A. A comparative study of two models for the seismic analysis of buildings. Ing. Investig. [online]. 2012, vol.32, n.3, pp.37-41. ISSN 0120-5609.

This paper presents a model for the seismic analysis of buildings, taking two lumped masses at each level in a structure's free nodes and comparing them to the traditional model which considers lumped masses per level, i.e., a mass for each floor of the entire building. This is usually done in the seismic analysis of buildings; not all values are conservative in the latter, as can be seen in the table of results. Both models took shear deformations into account. Therefore, the usual practice of considering a lumped mass per each level would not be a recommended solution; using two lumped masses per level is thus proposed and is also more related to real conditions.

Keywords : modal analysis; spectral analysis; eigenvalues and eigenvectors; modal participation factor; spectral acceleration; maximum normal coordinate vector.

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