Publications
267 results found
Bommer JJ, 2012, Increasing regulatory assurance in earthquake hazard assessments for nuclear facilities, Pages: 22-31
Papaspiliou M, Kontoe S, Bommer JJ, 2012, An exploration of incorporating site response into PSHA, Part I: Issues related to site response analysis methods, Soil Dynamics and Earthquake Engineering, Vol: 42, Pages: 302-315
This paper presents a series of analyses for the evaluation of the ground response of two NEHRP class D sites, subjected to shaking by a large number of strong ground-motion records. The two investigated sites have very distinct profiles, but they are characterised by almost identical Vs30 values. The site response analyses are performed using various methods of analysis and input parameters in order to explore the sensitivity of the ground response estimates and to identify the dominating parameters. Equivalent linear analysis is performed using different sets of dynamic soil properties curves, while nonlinear analysis is performed using different target dynamic soil curves, viscous damping formulations and fitting procedures for the constitutive model parameters. Particular focus is given to the sensitivity of the response when soil sites are subjected to high-intensity shaking, a subject of particular interest when the prediction of surface ground motions with low annual probabilities of exceedance is the target of probabilistic seismic hazard analyses (PSHA). The site response analysis results of this paper are incorporated into the probabilistic framework of Bazzurro and Cornell [1] in our companion paper in order to assess their impact on the final soil surface hazard calculation.
Papaspiliou M, Kontoe S, Bommer JJ, 2012, An Exploration of Incorporating Site Response into PSHA Part II: Sensitivity of Hazard Estimates to Site Response Approaches, Soil Dynamics and Earthquake Engineering, Vol: 42, Pages: 316-330
This paper examines the sensitivity of seismic hazard analyses to various site response analysis procedures. Site effects are incorporated in the hazard calculations using a probabilistic approach and specifically the methodology of Bazzurro and Cornell [1] for the transformation of a generic ground-motion prediction equation to a site-specific one. The paper explores the sensitivity of the median amplification function, its standard deviation and the resulting surface hazard curve, to different methods of site response analysis and model input parameters. The computed site-specific surface hazard curves are also compared with those obtained from a generic soil ground-motion prediction equation. For the two sites investigated, it is shown that the choice of equivalent linear or nonlinear analysis with different constitutive model parameters has a significant impact on the hazard results. The sandy site was seen to be more sensitive to the site response analysis approach employed than the clayey site.
Akkar S, Kale O, Yenier E, et al., 2011, The high-frequency limit of usable response spectral ordinates from filtered analogue and digital strong-motion accelerograms, EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, Vol: 40, Pages: 1387-1401, ISSN: 0098-8847
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- Citations: 35
Bommer JJ, Akkar S, Kale O, 2011, A Model for Vertical-to-Horizontal Response Spectral Ratios for Europe and the Middle East, BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, Vol: 101, Pages: 1783-1806, ISSN: 0037-1106
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- Citations: 63
Arango MC, Strasser FO, Bommer JJ, et al., 2011, A strong-motion database from the Central American subduction zone, JOURNAL OF SEISMOLOGY, Vol: 15, Pages: 261-294, ISSN: 1383-4649
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- Citations: 3
Bommer JJ, Papaspiliou M, Price W, 2011, Earthquake response spectra for seismic design of nuclear power plants in the UK, Publisher: ELSEVIER SCIENCE SA, Pages: 968-977, ISSN: 0029-5493
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- Citations: 18
Arango MC, Strasser FO, Bommer JJ, et al., 2011, A strong-motion database from the Peru-Chile subduction zone, JOURNAL OF SEISMOLOGY, Vol: 15, Pages: 19-41, ISSN: 1383-4649
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- Citations: 15
Bommer JJ, 2011, Ground-Motion Models for Defining Seismic Actions in Eurocode 8, EARTHQUAKE DATA IN ENGINEERING SEISMOLOGY: PREDICTIVE MODELS, DATA MANAGEMENT AND NETWORKS, Vol: 14, Pages: 17-28, ISSN: 1573-6059
Coppersmith KJ, Bommer JJ, Kammerer AM, et al., 2010, Implementation guidance for SSHAC level 3 and 4 processes, Pages: 3068-3078
Risk analysis for critical facilities requires a probabilistic assessment of the hazards that could affect the installation. The complexity of the processes that generate geological hazards such as seismic ground shaking and volcanic events is such that there is inevitably large uncertainty associated in the hazard assessment. This uncertainty is reflected in the range of legitimate technical interpretations made by informed technical experts based on the available data. Procedures to develop multiple expert assessments for seismic hazards in a structured process have been established in the SSHAC (Senior Seismic Hazard Analysis Committee) guidelines. The objective of the present paper is to capture and clarify the insights gained from performing a number of detailed assessments using the SSHAC approach over the past 10-15 years. Unlike classical expert elicitation, which attempts to extract information from independent experts, the SSHAC process encourages interaction amongst experts and fosters learning by the experts throughout the process, with the ultimate objective of capturing the full community distribution of technical interpretations. The SSHAC guidelines, written largely in abstract, have now been implemented in practice several times. In these studies valuable lessons have been learned, which are now being distilled into a new U.S. Nuclear Regulatory Commission NUREG-series report to provide practical guidance on implementing SSHAC processes for hazard assessments. A key lesson from these studies is that higher level SSHAC processes (Levels 3 and 4) which specify the use of a Participatory Peer Review Panel (PPRP), provide a higher degree of regulatory assurance and stability for the initial development of hazard models for safety-critical installations. Also, significant technically-informed participation by project sponsors and regulators throughout the process enhances the likelihood of regulatory acceptance.
Strasser FO, Arango MC, Bommer JJ, 2010, Scaling of the Source Dimensions of Interface and Intraslab Subduction-zone Earthquakes with Moment Magnitude, SEISMOLOGICAL RESEARCH LETTERS, Vol: 81, Pages: 941-950, ISSN: 0895-0695
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- Citations: 183
Al Atik L, Abrahamson N, Bommer JJ, et al., 2010, The Variability of Ground-Motion Prediction Models and Its Components, SEISMOLOGICAL RESEARCH LETTERS, Vol: 81, Pages: 794-801, ISSN: 0895-0695
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- Citations: 418
Bommer JJ, Douglas J, Scherbaum F, et al., 2010, On the Selection of Ground-Motion Prediction Equations for Seismic Hazard Analysis, SEISMOLOGICAL RESEARCH LETTERS, Vol: 81, Pages: 783-793, ISSN: 0895-0695
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- Citations: 193
Stafford PJ, Bommer JJ, 2010, Theoretical consistency of common record selection strategies in Performance-based Earthquake Engineering, Advances in Performance-Based Earthquake Engineering, Editors: Fardis, Publisher: Springer Verlag, ISBN: 9789048187454
Strasser FO, Bommer JJ, 2010, Reply to "Comment on '<i>Review</i>: Strong Ground Motions-Have We Seen the Worst?' by Fleur O. Strasser and Julian J. Bommer" by Heriberta Castanos and Cinna Lomnitz, BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, Vol: 100, Pages: 1838-1839, ISSN: 0037-1106
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- Citations: 1
Bommer J, 2010, Seismic hazard assessment for nuclear power plant sites in the UK: Challenges and Possibilities, Nuclear Future, Vol: 6, Pages: 164-170, ISSN: 1745-2058
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- Citations: 6
Akkar S, Bommer JJ, 2010, Empirical Equations for the Prediction of PGA, PGV, and Spectral Accelerations in Europe, the Mediterranean Region, and the Middle East, SEISMOLOGICAL RESEARCH LETTERS, Vol: 81, Pages: 195-206, ISSN: 0895-0695
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- Citations: 483
Bal IE, Bommer JJ, Stafford PJ, et al., 2010, The influence of geographicalresolution of urban exposure data in an Earthquake Loss Model, Earthquake Spectra
Buratti N, Stafford PJ, Bommer JJ, 2010, Earthquake accelerogram selection and scalingprocedures for estimating the distribution of structural response, Journal of Structural Engineering - ASCE
Papaspiliou M, Kontoe S, Bommer J, 2010, Site Response Analysis Incorporated in Probabilistic Seismic Hazard Assessments, 9th US National and 10th Canadian Conference on Earthquake Engineering, Publisher: EERI
Bommer JJ, Stafford PJ, Akkar S, 2010, Current empirical ground-motion prediction equations for Europe and their application to Eurocode 8, Bulletin of Earthquake Engineering, Vol: 8, Pages: 5-26
Strasser FO, Bommer JJ, 2009, <i>Review</i>: Strong Ground Motions-Have We Seen the Worst?, BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, Vol: 99, Pages: 2613-2637, ISSN: 0037-1106
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- Citations: 37
Strasser FO, Bommer JJ, 2009, Large-amplitude ground-motion recordings and their interpretations, SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, Vol: 29, Pages: 1305-1329, ISSN: 0267-7261
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- Citations: 17
Tavera H, Bernal I, Strasser FO, et al., 2009, Ground motions observed during the 15 August 2007 Pisco, Peru, earthquake, BULLETIN OF EARTHQUAKE ENGINEERING, Vol: 7, Pages: 71-111, ISSN: 1570-761X
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- Citations: 12
Strasser FO, Abrahamson NA, Bommer JJ, 2009, Sigma: Issues, Insights, and Challenges, SEISMOLOGICAL RESEARCH LETTERS, Vol: 80, Pages: 40-56, ISSN: 0895-0695
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- Citations: 180
Stafford PJ, Bommer JJ, 2009, Theoretical consistency of common record selection strategies in Performance-based Earthquake Engineering, 1st ACES Workshop on Advances in Performance-based Earthquake Engineering
Bommer JJ, Stafford PJ, Alarcón JE, 2009, Empirical equations for the prediction of the Significant, Bracketed and Uniform duration of earthquake ground motion, Bulletin of the Seismological Society of America, Vol: 99, Pages: 3217-3233, ISSN: 0037-1106
Stafford PJ, Bommer JJ, 2009, Empirical equations for the prediction of the equivalent number of cycles of earthquake ground motion, Soil Dynamics and Earthquake Engineering, Vol: 29, Pages: 1425-1436
Aldama-Bustos G, Bommer JJ, Fenton CH, et al., 2009, Probabilistic seismic hazard analysis for rock sites in the cities of Abu Dhabi, Dubai and Ra's Al Khaymah, United Arab Emirates, GEORISK, Vol: 3, Pages: 1-29, ISSN: 1749-9518
Bommer JJ, Scherbaum F, 2008, The Use and Misuse of Logic Trees in Probabilistic Seismic Hazard Analysis, EARTHQUAKE SPECTRA, Vol: 24, Pages: 997-1009, ISSN: 8755-2930
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- Citations: 158
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