Open AccessComparison of non-linear dynamic frame response under recorded and numerically generated accelerograms
Author(s) -
Oscar Möller,
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Juan P. Ascheri,
Leandro Emanuel Nardi,
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Publication year - 2021
Language(s) - English
DOI - 10.7764/rdlc.20.3.576
Subject(s) - displacement (psychology) , response spectrum , stiffness , acceleration , curvature , moment (physics) , structural engineering , frame (networking) , spectral acceleration , representation (politics) , earthquake resistance , set (abstract data type) , incremental dynamic analysis , mathematics , seismic analysis , computer science , peak ground acceleration , geometry , engineering , physics , classical mechanics , ground motion , psychology , telecommunications , politics , law , political science , psychotherapist , programming language
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.