Comparison of non-linear dynamic frame response under recorded and numerically generated accelerograms
- Autores: Oscar Möller, Juan Pablo Ascheri, Leandro Emanuel Nardi
- Localización: Revista de la Construcción, ISSN-e 0718-915X, ISSN 0717-7925, Vol. 20, Nº. 3, 2021, págs. 576-590
- Idioma: inglés
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Resumen
The time history analysis of the linear and non-linear response of earthquake resistant structures is a tool increasingly used in practice and required by codes. In this paper, a set of 12 accelerograms was generated numerically with the spectral representation methodology. Another set of 15 accelerograms were selected from a database of earthquake records and scaled with a uniform factor so that the mean spectrum fits the design one. The non-linear dynamic response of two frames of different stiffness and resistance was obtained under the action of the two sets of accelerograms. The global force - displacement results showed a higher coefficient of variation for the set of recorded accelerograms, especially for the structure of lower resistance that has a strong non-linear incursion. The same tendency was obtained for the moment - curvature relationships of beam and column sections, with higher dispersions compared to the global results. In addition, the influence of the vertical acceleration component was analyzed, resulting in a higher incidence in the interior columns of the frames.
