Bulletin of the New Zealand Society for Earthquake Engineering https://bull.nzsee.org.nz/index.php/bnzsee <p>Bulletin of the New Zealand Society for Earthquake Engineering</p> en-US <ol> <li>You warrant that you have the authority to act as the agent of all the authors of this article for the purpose of entering into this agreement.</li> <li>You hereby grant a <a href="https://creativecommons.org/licenses/by/4.0" target="_blank" rel="noopener">Creative Commons Attribution (CC-BY) license</a> in the article to the general public.</li> <li>You agree to require that a citation to the original publication of the article in the Bulletin of the New Zealand Society for Earthquake Engineering be included in any attribution statement satisfying the attribution requirement of the Creative Commons license of paragraph 2.</li> <li>You retain ownership of all rights under copyright in all versions of the article, and all rights not expressly granted in this agreement.</li> <li>To the extent that any edits made by the publisher to make the article suitable for publication in the journal amount to copyrightable works of authorship, the publisher hereby assigns all right, title, and interest in such edits to you. The publisher agrees to verify with you any such edits that are substantive. You agree that the license of paragraph 2 covers such edits.</li> <li>You further warrant that: <ol type="a"> <li>The article is original, has not been formally published in any other peer-reviewed journal or in a book or edited collection, and is not under consideration for any such publication.</li> <li>You are the sole author(s) of the article, and that you have a complete and unencumbered right to make the grants you make.</li> <li>The article does not libel anyone, invade anyone’s copyright or otherwise violate any statutory or common law right of anyone, and that you have made all reasonable efforts to ensure the accuracy of any factual information contained in the article. You agree to indemnify the publisher against any claim or action alleging facts which, if true, constitute a breach of any of the foregoing warranties or other provisions of this agreement, as well as against any related damages, losses, liabilities, and expenses incurred by the publisher.</li> </ol> </li> <li>This is the entire agreement between you and the publisher, and it may be modified only in writing. It will be governed by the laws of New Zealand. It will bind and benefit our respective assigns and successors in interest, including your heirs.</li> </ol> rajesh.dhakal@canterbury.ac.nz (Rajesh Dhakal) reagan.c@canterbury.ac.nz (Reagan Chandramohan) Tue, 31 Dec 2019 00:00:00 +1300 OJS http://blogs.law.harvard.edu/tech/rss 60 Ground motion simulations of Hope fault earthquakes https://bull.nzsee.org.nz/index.php/bnzsee/article/view/458 <p>This paper examines ground motions for a major potential Mw7.51 rupture of the Hope Fault using a physics based simulation methodology and a 3D crustal velocity model of New Zealand. The simulation methodology was validated for use in the region through comparison with observations for a suite of historic small magnitude earthquakes located proximal to the Hope Fault. Simulations are compared with conventionally utilised empirical ground motion models, with simulated peak ground velocities being notably higher in regions with modelled sedimentary basins. A sensitivity analysis was undertaken where the source characteristics of magnitude, stress parameter, hypocentre location and kinematic slip distribution were varied and an analysis of their effect on ground motion intensities is presented. It was found that the magnitude and stress parameter strongly influenced long and short period ground motion amplitudes, respectively. Ground motion intensities for the Hope Fault scenario are compared with the 2016 Kaik¯oura Mw7.8 earthquake, it was found that the Kaikoura earthquake produced stronger motions along the eastern South Island, while the Hope Fault scenario resulted in stronger motions immediately West of the near-fault region and similar levels of ground motion in Canterbury. The simulated ground motions for this scenario complement prior empirically-based estimates and are informative for mitigation and emergency planning purposes.</p> Ethan M. Thomson, Robin L. Lee, Brendon A. Bradley Copyright (c) https://bull.nzsee.org.nz/index.php/bnzsee/article/view/458 Sun, 01 Dec 2019 00:00:00 +1300 A detailed inventory of medium to high-rise buildings in Wellington's central business district https://bull.nzsee.org.nz/index.php/bnzsee/article/view/459 <p>Recent earthquakes in New Zealand not only highlighted the vulnerabilities of the existing building stock but also the need for: (i) a better understanding of the building inventory, and (ii) easy access to information for quicker response after an event. In the case of Wellington, efforts over the years by the City Council and other stakeholders have produced a number of useful datasets about the building inventory. These available datasets when put together are critical in understanding the composition and characteristics of the building inventory in Wellington. This paper describes the available information, and the process to combine the different strands of data possessed by multiple stakeholders into an effective and usable multi-disciplinary building inventory database for Wellington’s CBD. The uses and future directions for this collated database are also discussed.</p> Aishwarya Puranam, Olga Filippova, Jacob Pastor-Paz, Max Stephens, Kenneth J. Elwood, Najif Ismail, Ilan Noy, Eyitayo Opabula Copyright (c) https://bull.nzsee.org.nz/index.php/bnzsee/article/view/459 Sun, 01 Dec 2019 00:00:00 +1300 Ground motion models for Arias intensity, cumulative absolute velocity, peak incremental ground velocity, and significant duration in New Zealand https://bull.nzsee.org.nz/index.php/bnzsee/article/view/460 <p>This study proposes empirical ground motion models for a variety of non-spectral intensity measures and significant durations in New Zealand. Equations are presented for the prediction of the median and maximum rotated components of Arias intensity, cumulative absolute velocity, cumulative absolute velocity above a 5 cm/s<sup>2</sup> acceleration threshold, peak incremental ground velocity, and the 5% to 75% and 5% to 95% significant durations. Recent research has highlighted the usefulness of these parameters in both structural and geotechnical engineering. The New Zealand Strong Motion Database provides the database for regression and includes many earthquakes from all regions of New Zealand with the exceptions of Auckland and Northland, Otago and Southland, and Taranaki. The functional forms for the proposed models are selected using cross validation. The possible influence of effects not typically included in ground motion models for these intensity measures is considered, such as hanging wall effects and basin depth effects, as well as altered attenuation in the Taupo Volcanic Zone. The selected functional forms include magnitude and rupture depth scaling, attenuation with distance, and shallow site effects. Finally, the spatial autocorrelation of the models’ within-event residuals is considered and recommendations are made for developing correlated maps of intensity predictions stochastically.</p> Zach Bullock Copyright (c) https://bull.nzsee.org.nz/index.php/bnzsee/article/view/460 Sun, 01 Dec 2019 00:00:00 +1300