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Bias assessment in Incremental Dynamic Analysis due to record scaling

Zacharenaki, Athanasia and Fragiadakis, Michalis and Assimaki, Dominic and Papadrakakis, Manolis (2014) Bias assessment in Incremental Dynamic Analysis due to record scaling. Soil Dynamics and Earthquake Engineering, 67 . pp. 158-168. ISSN 0267-7261.

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Incremental Dynamic Analysis (IDA) involves a series of nonlinear response history analyses with a suite of incrementally scaled ground motion records. Although IDA is perhaps the most comprehensive seismic performance assessment method, it receives criticism because several ground motion records are scaled up until the structure collapses. The scaling practice often results to unrealistic multipliers, thus modifying the amplitude of the ground motion and introducing bias on the structural performance estimation. Record scaling is a common practice in earthquake engineering due to the lack of natural records corresponding to large magnitudes and/or small distances from the fault rupture location. In this work we use a large number of ground motion records to compare the predictions of IDA with that of unscaled ground motions and we propose a new methodology in order to quantify the bias introduced in IDA. Apart from natural records, we have conducted broadband ground motion simulations for rupture scenarios of weak, medium and large magnitude events in order to expand our record database. The investigation is performed on a series of inelastic single-degree-of-freedom systems and on two multistory steel moment frame buildings. The results pinpoint both qualitatively and quantitatively, for the full range of limit-states, the bias that IDA introduces on the structural performance estimation.

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Assimaki, Dominic0000-0002-3008-8088
Additional Information:© 2014 Elsevier Ltd. Received 11 February 2014, Revised 16 September 2014, Accepted 20 September 2014, Available online 10 October 2014.
Subject Keywords:Record scaling; Incremental Dynamic Analysis; Bias; Bootstrap; Synthetic records; Nonlinear response history analysis
Record Number:CaltechAUTHORS:20150212-100529768
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Official Citation:Athanasia Zacharenaki, Michalis Fragiadakis, Dominic Assimaki, Manolis Papadrakakis, Bias assessment in Incremental Dynamic Analysis due to record scaling, Soil Dynamics and Earthquake Engineering, Volume 67, December 2014, Pages 158-168, ISSN 0267-7261, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54774
Deposited By: Ruth Sustaita
Deposited On:13 Feb 2015 04:58
Last Modified:03 Oct 2019 08:00

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