Mainshock‐consistent ground motion record selection for aftershock sequences

2020 ◽  
Vol 49 (8) ◽  
pp. 754-771 ◽  
Author(s):  
Athanasios N. Papadopoulos ◽  
Mohsen Kohrangi ◽  
Paolo Bazzurro
Keyword(s):  
Ground Motion ◽  
Aftershock Sequences ◽  
Selection For ◽  
Record Selection ◽  
Ground Motion Record Selection

Ground Motion Record Selection Based on Broadband Spectral Compatibility

2014 ◽  
Vol 30 (4) ◽  
pp. 1427-1448 ◽  
Author(s):  
Chiara Smerzini ◽  
Carmine Galasso ◽  
Iunio Iervolino ◽  
Roberto Paolucci
Keyword(s):  
Ground Motion ◽  
Earthquake Engineering ◽  
Time History ◽  
Strong Motion ◽  
Software Tool ◽  
Engineering Practice ◽  
Ongoing Research ◽  
Research Activities ◽  
Record Selection ◽  
Ground Motion Record Selection

The increasing interest in performance-based earthquake engineering has promoted research on the improvement of hazard-consistent seismic input definition and on advanced criteria for strong motion record selection to perform nonlinear time history analyses. Within the ongoing research activities to improve the representation of seismic actions and to develop tools as a support for engineering practice, this study addresses the selection of displacement-spectrum-compatible real ground motions, with special reference to Italy. This involved (1) the definition of specific target displacement spectra for Italian sites, constrained—both at long and short periods—by results of probabilistic seismic hazard analyses; (2) the compilation of a high-quality strong ground motion database; and (3) the development of a software tool for computer-aided displacement-based record selection. Application examples show that sets of unscaled, or lightly scaled, accelerograms with limited record-to-record spectral variability can also easily be obtained when a broadband spectral compatibility is required.

Conditional spectrum-based ground motion record selection using average spectral acceleration

2017 ◽  
Vol 46 (10) ◽  
pp. 1667-1685 ◽  
Author(s):  
Mohsen Kohrangi ◽  
Paolo Bazzurro ◽  
Dimitrios Vamvatsikos ◽  
Andrea Spillatura
Keyword(s):  
Ground Motion ◽  
Spectral Acceleration ◽  
Record Selection ◽  
Ground Motion Record Selection

Correlation of Spectral Acceleration Values of Mainshock-Aftershock Ground Motion Pairs

2019 ◽  
Vol 35 (1) ◽  
pp. 39-60 ◽  
Author(s):  
Athanasios N. Papadopoulos ◽  
Mohsen Kohrangi ◽  
Paolo Bazzurro
Keyword(s):  
Ground Motion ◽  
Seismic Hazard Assessment ◽  
Statistical Correlation ◽  
Spectral Acceleration ◽  
Substantial Evidence ◽  
Period Range ◽  
Selection For ◽  
Spectral Accelerations ◽  
Record Selection ◽  
The Impact

This study examines the statistical correlation between the spectral accelerations of mainshock-aftershock ground motion pairs in the NGA-West2 ground motion database. Aftershock spectral accelerations are found mildly correlated with their mainshock counterparts for closely spaced periods of vibration and are weakly correlated over the rest of the period range. We further investigate for potential differences between the interperiod correlations of mainshock and aftershock spectral accelerations, finding no substantial evidence to support the use of different models for the two cases. Furthermore, the impact of different rupture scenario parameters on correlation is examined and discussed. The derived correlation estimates are expected to aid in aftershock seismic hazard assessment and/or in record selection for risk assessment applications by using the mainshock spectral ordinates to obtain better predictions for the aftershock ground motion.

Engineering ground motion record selection in the ITalian ACcelerometric Archive

2011 ◽  
Vol 9 (6) ◽  
pp. 1761-1778 ◽  
Author(s):  
Iunio Iervolino ◽  
Carmine Galasso ◽  
Roberto Paolucci ◽  
Francesca Pacor
Keyword(s):  
Ground Motion ◽  
Record Selection ◽  
Ground Motion Record Selection

scholarly journals Ground Motion Record Selection using Multi-objective Optimization Algorithms: A Comparative Study

2019 ◽  
Author(s):  
Ali Kaveh ◽  
Roya Mahdipou Moghanni ◽  
Seyed Mohammad Javadi
Keyword(s):  
Ground Motion ◽  
Earthquake Engineering ◽  
Optimization Algorithms ◽  
Time History ◽  
Multi Objective Optimization ◽  
Nsga Ii ◽  
Site Specific ◽  
Multi Objective ◽  
Record Selection ◽  
Ground Motion Record Selection

Performing time history dynamic analysis using site-specific ground motion records according to the increasing interest in the performance-based earthquake engineering has encouraged studies related to site-specific Ground Motion Record (GMR) selection methods. This study addresses a ground motion record selection approach based on three different multi-objective optimization algorithms including Multi-Objective Particle Swarm Optimization (MOPSO), Non-dominated Sorting Genetic Algorithm II (NSGA-II) and Pareto Envelope-based Selection Algorithm II (PESA-II). The method proposed in this paper selects records efficiently by matching dispersion and mean spectrum of the selected record set and target spectrums in a predefined period. Comparison between the results shows that NSGA II performs better than the other algorithms in the case of GMR selection.

Impact of partially non-ergodic site-specific probabilistic seismic hazard on risk assessment of single buildings

2020 ◽  
pp. 875529302093881
Author(s):  
Mohsen Kohrangi ◽  
Sreeram Reddy Kotha ◽  
Paolo Bazzurro
Keyword(s):  
Risk Assessment ◽  
Ground Motion ◽  
A Priori ◽  
Real Life ◽  
Site Specific ◽  
Risk Estimates ◽  
The Difference ◽  
Record Selection ◽  
Ground Motion Record Selection ◽  
The Impact

The growth of global ground-motion databases has allowed generation of non-ergodic ground-motion prediction equations (GMPEs) based on specific on-site recordings. Several studies have investigated the differences between the hazard estimates from ergodic versus non-ergodic GMPEs. Here instead we focus on the impact of non-ergodic PSHA estimates on the seismic risk of nonlinear single-degree-of-freedom systems representing ductile structures and compare it with the traditional risk estimates obtained using ergodic GMPEs. The structure-and-site-specific risk estimates depend not only on the difference in the hazard estimates but also on the different hazard-consistent ground-motion record selection that informs the response calculation. The more accurate structure-and-site-specific non-ergodic risk estimates show that traditional ones may be biased in a way impossible to predict a priori. Hence, the use of the non-ergodic approach is recommended, whenever possible. However, further advancements of non-ergodic GMPEs are necessary before being routinely utilized in real-life risk assessment applications.

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