Browsing New Zealand Society for Earthquake Engineering by Author "d4b981a0-e097-4e6f-9f96-c5d19a8cd6a9"
Now showing items 1-12 of 12
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Analysis of Site-Response Residuals from Empirical Ground-Motion Models to Account for Observed Sedimentary Basin Effects in Wellington, New Zealand
de la Torre, Chris; Bradley, Brendon; Lee, Robin; Tiwari, Ayushi; Wotherspoon, Liam; Kaiser, Anna (2024-04-09)Analysis of prediction-observation residuals from the empirical ground motion models (GMMs) used in the 2022 New Zealand National Seismic Hazard Model (NZ NSHM) update indicates a general underprediction of ground motions ... -
Comparing alternative methods to account for shallow site effects in hybrid broadband ground-motion simulations
Kuncar, Felipe; Bradley, Brendon; de la Torre, Christopher; Rodriguez-Marek, Adrian; Zhu, Chuanbin; Lee, Robin (2024-04-09)Shallow site effects are usually not explicitly modelled in hybrid broadband ground-motion simulations, and their proper incorporation may be key to improving prediction at soil sites. This paper examines five methods to ... -
Development and implications of an expanded national earthquake catalogue for New Zealand
Hutchinson, Jesse; Lee, Robin; Bradley, Brendon; Van Houtte, Chris; Kaiser, Anna; Wotherspoon, Liam (2021-04-14)In the last two decades, New Zealand (NZ) has experienced significant earthquakes, including the 2010 M 7.2 Darfield, 2011 M 6.2 Christchurch, and 2016 M 7.8 Kaikōura events. Amongst these large events, tens of thousands ... -
Full Waveform Tomography for the upper South Island region, New Zealand
Nguyen, Trung Dung; Bradley, Brendon; Lee, Robin; Graves, Robert (2021-04-14)In this paper, we apply Full Waveform Tomography (FWT) based on the Adjoint-Wavefield (AW) method to iteratively invert an existing 3-D geophysical velocity model for the upper South Island region, New Zealand. Through the ... -
Ground motion simulation validation with explicit uncertainty incorporation for small magnitude earthquakes in New Zealand
Neill, Sarah; Lee, Robin; Bradley, Brendon (2021-04-14)This study investigates the uncertainty of simulated earthquake ground motions for small-magnitude events (Mw 3.5 – 5) in Canterbury, New Zealand. 148 events were simulated with specified uncertainties in: event magnitude, ... -
Interim Results from empirical ground motion model evaluation for the NZ National Seismic Hazard Model Update
Lee, Robin; Bradley, Brendon; Manea, Elena; Hutchinson, Jesse (2022-04-27)As a part of the ongoing 2022 NZ National Seismic Hazard Model (NSHM) Update, the predictive capabilities of candidate empirical ground motion models are evaluated to ascertain models which provide good prediction for NZ ... -
Nationwide investigation of systematic site effects in New Zealand: Residual analysis of physics-based ground motion simulations
Tiwari, Ayushi; Bradley, Brendon; de la Torre, Christopher; Lee, Robin (2024-04-09)This study examines systematic site effects from the prediction residuals of physics-based ground motion simulations using a dataset of small magnitude (3.5 ≤ Mw ≤ 5.0) active shallow crustal earthquakes recorded in New ... -
Source modelling insights from ground motion simulation validation of moderate magnitude active shallow crustal earthquakes in New Zealand
Lee, Robin; Bradley, Brendon; Graves, Robert; Paterson, James; Motha, Jason (2021-04-14)Hybrid broadband ground motion simulation validation has been an ongoing effort in NZ with recent studies focussed on active shallow crustal earthquakes of large magnitude (Mw>7.0) and small magnitude (3.5<Mw≤5.0). Lessons ... -
Towards 3D ground motion simulation-based site amplification: a Wellington case study considering multiple basin geometries
Lee, Robin; Bradley, Brendon; Hill, Matthew; de la Torre, Christopher; Kaiser, Anna; Wotherspoon, Liam (2024-04-09)This paper presents a study on 3D ground motion simulation-based site amplification using the Wellington region of New Zealand as a case study. Several recent models of the Wellington sedimentary basin have been developed ... -
Trends in systematic site residuals with geomorphic categories for New Zealand ground-motion instrument sites
Tiwari, Ayushi; de la Torre, Christopher; Bradley, Brendon; Kuncar, Felipe; Lee, Robin (2023-04-19)This study investigates systematic site-effects from prediction residuals of physics-based ground-motion simulations for a database of small magnitude (i.e., 3.5 ≤ MW ≤ 5) shallow crustal earthquakes in New Zealand. The ... -
Validation of NZ small-magnitude ground-motion simulations using complex structural systems
Loghman, Vahid; Bradley, Brendon; Chandramohan, Reagan; Lee, Robin; McGann, Christopher (2021-04-14)This study assesses the need to consider complex structural models in ground-motion simulation validation. It develops a novel statistical framework to quantify the proportion of the differences in structural responses ... -
Wellington basin amplification: research goals and update from the National Seismic Hazard Model Programme
Kaiser, Anna; Hill, Matt; Wotherspoon, Liam; Bradley, Brendon; Lee, Robin; Roten, Daniel; Bourguignon, Sandra; Pancha, Aasha; Gerstenberger, Matt (2021-04-14)In Wellington, 3D basin amplification effects observed at 1 – 2 second spectral periods were identified as one factor likely to have exacerbated damage to mid-rise structures during the 2016 Mw 7.8 Kaikōura earthquake ...