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Influence of Ground Motion Duration on the Peak Drift Demands of Reinforced Concrete Buildings

H. A. D. Samith Buddika

Abstract


Previous studies regarding the effect of strong-motion duration on the behavior of reinforced concrete buildings indicate that the findings regarding the influence of strong-motion duration on peak damage indicators are not consistent. Most of the previous studies available are based on two dimensional structural models. The objective of the present study is to further investigate the influence of earthquake strong-motion duration on structural behavior with three-dimensional building models. In this study 4-story and 8-story reinforced concrete frame buildings designed according to 2009 IBC and ACI-318-08 for site class D, are subjected to 30 strong-motions with different durations. The influence of the spectral amplitude of the ground motions were homogenized by spectral matching to the 5%-damped design response spectrum in the time domain. The results showed that there is no correlation between strong-motion duration and displacement based damage measures such as peak inter-story drift and peak roof drift which are currently used in most of the seismic design codes. However, results showed that earthquakes having the same strong-motion duration can result in significantly different inter-story drifts even though they are matched to the same target design spectrum.

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References


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DOI: https://doi.org/10.37628/jsea.v3i2.242

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