Abstract

ALVA, Rodrigo E.; PINZON, Luis A.  and  PUJADES, Luis G.. Arias intensity and significant duration on structural dynamic analysis. Ingeniería [online]. 2022, vol.32, n.2, pp.1-14. ISSN 2215-2652.  http://dx.doi.org/10.15517/ri.v32i2.49580.

The use of standard procedures and methodologies for nonlinear dynamic analysis (NLDA) is increasing. In NLDA guidelines, many aspects are open to expert judgement and alternative interpretations can be adopted, such is the case of the selection of the input ground motions. Inappropriate selection of seismic actions can lead to unrealistic results. This study aims to analyse the influence of the Arias intensity and the significant duration of spectral matched records on NLDA. Particularly, variations in the damage of a building were studied using four different accelerograms adjusted to a specific design spectrum. Results have shown significant differences in the expected structural damage. Records with larger Arias intensity and significant durations resulted in a greater structural damage, even though they all share an equivalent response spectrum. It is concluded that these parameters should be also taken into account in the selection of design ground motions for NLDA.

Keywords : Accelerograms; dynamic analysis; structural damage; significant duration; response spectrum; Arias intensity.

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