A5101790332- Seismic Performance and Analysis
- Seismic Waves and Analysis
- Structural Health Monitoring Techniques
- earthquake and tectonic studies
- Geotechnical Engineering and Underground Structures
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Tunneling and Rock Mechanics
- Geotechnical Engineering and Analysis
- Landslides and related hazards
- Geological Modeling and Analysis
- Structural Engineering and Vibration Analysis
- Railway Engineering and Dynamics
- Hydraulic and Pneumatic Systems
- Infrastructure Maintenance and Monitoring
- Geotechnical Engineering and Soil Mechanics
- Masonry and Concrete Structural Analysis
- Earthquake and Tsunami Effects
- Wind and Air Flow Studies
- Risk and Safety Analysis
- Structural Response to Dynamic Loads
- demographic modeling and climate adaptation
- Carbon Dioxide Capture Technologies
- Geotechnical Engineering and Soil Stabilization
- Geological formations and processes
University of Canterbury
2017-2025
National Center for Injury Prevention and Control
2022
Centers for Disease Control and Prevention
2022
Abstract The 2022 revision of Aotearoa New Zealand National Seismic Hazard Model (NZ NSHM 2022) has involved significant all datasets and model components. In this article, we present a subset many results from the as well an overview governance, scientific, review processes followed by NZ team. calculated hazard increased for most when compared with previous models. models are available online.
ABSTRACT This article summarizes the development of 2023 New Zealand ground-motion database (NZGMDB). A preceding version was formally used as central in characterization modeling for 2022 (NZ) National Seismic Hazard Model (NSHM) revision. The contains ground motions events with a moment magnitude greater than ∼3.0 from years 2000 to end 2022. Several challenges associated NZ earthquake source metadata are explained, including determination location, magnitude, tectonic classification, and...
The Technical Specification (TS) 1170.5 has been developed to incorporate the output of 2022 New Zealand National Seismic Hazard Model revision (NSHM2022) [1] and update Clause B1 Verification Method 1 (B1/VM1) Building Code. In this paper, we discuss proposed site classification methodology based on Vs(30) (i.e., time-averaged shear-wave velocity from ground surface 30 m depth) which is used effects in TS design spectra. reasoning for use classification, a significant departure Standards...
ABSTRACT This article summarizes the ground-motion characterization (GMC) model component of 2022 New Zealand National Seismic Hazard Model (2022 NZ NSHM). The development process included establishing a NZ-specific context through creation new database, and consideration alternative models (GMMs) that have been historically used in or recently developed for global application with without regionalizations. Explicit attention was given to employing state-of-the-art approaches terms their...
Ground motion simulation validation is an important and necessary task toward establishing the efficacy of physics-based ground simulations for seismic hazard analysis earthquake engineering applications. This article presents a comprehensive commonly used Graves Pitarka hybrid broadband methodology with recently developed three-dimensional (3D) Canterbury Velocity Model. done through 148 small magnitude events in Canterbury, New Zealand, region order to supplement prior efforts directed at...
ABSTRACT This article presents an evaluation of empirical ground-motion models (GMMs) for active shallow crustal, subduction interface, and slab earthquakes using a recently developed New Zealand (NZ) database the 2022 National Seismic Hazard Model revision. study considers both NZ-specific global models, which require to inform their applicability in NZ context. A quantitative comparison between is conducted based on intensity measure residuals mixed-effects regression framework. The...
This paper discusses simulated ground motion intensity, and its underlying modelling assumptions, for great earthquakes on the Alpine Fault. The simulations utilise latest understanding of wave propagation physics, kinematic earthquake rupture descriptions three-dimensional nature Earth's crust in South Island New Zealand. effect hypocentre location is explicitly examined, which found to lead significant differences intensities (quantified form peak velocity, PGV) over northern half...
Shallow site effects are indirectly considered in conventional hybrid broadband ground-motion simulations, and their proper incorporation may be key to improving predictions at soil sites. This article presents examines five methods adjust simulations account for these effects. These use different approaches modeling response require amounts of site-characterization data: Methods 1 2 only proxy parameters (e.g. [Formula: see text], text]) describe the conditions, with Method relying solely...
This study examines the performance of nonlinear total stress one-dimensional (1D) wave propagation site response analysis for modeling effects in physics-based ground motion simulations 2010–2011 Canterbury, New Zealand earthquake sequence. approach explicitly models three-dimensional (3D) phenomena at regional scale, and detailed local scale. The is compared with a more commonly used empirical V S 30 -based method computing amplification simulated motions, as well prediction via an model....
This article presents a comprehensive validation of the hybrid broadband ground-motion simulation approach (via commonly used Graves and Pitarka method) in New Zealand context with small magnitude point source ruptures using an extensive set 5218 ground motions recorded at 212 sites from 479 active shallow crustal earthquakes across country. Modifications to method inferred previous are implemented, improvements explicitly quantified. Empirical models also considered provide benchmark for...
High-quality earthquake ground-motion records are required for various applications in engineering and seismology; however, quality assessment of is time-consuming if done manually poorly handled by automation with conventional mathematical functions. Machine learning well suited to this problem, a supervised deep-learning-based model was developed estimate the all types through training on 1096 example from earthquakes New Zealand, which an active tectonic environment crustal subduction...
ABSTRACT We provide an overview of the treatment site effects in New Zealand National Seismic Hazard Model (NZ NSHM), including a case study basin central Wellington. The NZ NSHM 2022 includes change parameter from subsoil class (NZS class) to VS30. Poor VS30 characterization is major source uncertainty NSHM; however, advanced Wellington allows for in-depth study. First, we construct regional 3D shear-wave velocity model and maps parameters (T0, NZS class, VS30) At city soil sites, find...
The ambitious scopes of recent earthquake ground motion studies are generating a need for more high-quality records. As the number deployed sensors is rapidly growing through improved accessibility and cost (e.g., stations, low-cost accelerometers, smart phones), an exponentially increasing amount data being generated. Previously, quality-assured sets engineering applications were generated using both manual automated quality screening methodologies. More recently, new techniques have...
ABSTRACT This article summarizes hazard sensitivities associated with the updated ground-motion characterization modeling (GMCM) scheme adopted in recent revision of New Zealand National Seismic Hazard Model (NZ NSHM 2022). In terms impact on hazard, current GMCM (GMCM 2022) results an overall, at times significant, increase calculated mean respect to NZ 2010. With regard relative impact, update accounts for dominant change high-hazard regions, whereas low-hazard regions source model...
The magnitude Mw7.8 ‘Kaikōura’ earthquake occurred shortly after midnight on 14 November 2016. This paper presents an overview of the geotechnical impacts South Island New Zealand recorded during post-event reconnaissance.
 Despite large moment this earthquake, relatively little liquefaction was observed across Island, with only severe manifestation occurring in young, loose alluvial deposits floodplains Wairau and Opaoa Rivers near Blenheim. spatial extent volume ejecta is...
This paper presents a generalised velocity model construction methodology, its computational implementation, and application in the of New Zealand Velocity Model (NZVM2.0) for use physics-based broadband ground motion simulation. The methodology utilises multiple datasets spanning different length scales, which is enabled via modular subregions, geologic surfaces, parametric representations crustal velocity. A number efficiency-related workflows to decrease overall time are employed, while...
This study develops a method for estimating site amplification that combines instrumentally observed site-specific factors with adjustment from nonlinear site-response analyses. approach provides estimates of response large-strain motions based on observations and sophisticated modeling. A database weak-to-moderate intensity ground recorded in three basins Wellington, New Zealand is used to the amplification. subset nine strong-motion stations was selected perform analyses scaled strong...
A 3D high-resolution model of the Quaternary geological stratigraphic sequence in Canterbury, New Zealand region is developed utilising datasets over 500 high-quality water well logs from a database 29,985, and 370 near-surface cone penetration test (CPT) records 13,670. The model, using geostatistical Kriging, represents complex interbedded regional geology by characterising boundaries between significant formations as surfaces. examined form both surface contour maps vertical cross...
The utilization of end-to-end simulation for ground motion and consequent geohazard prediction in New Zealand (NZ) is presented. Validation recent damaging earthquakes, as well a large number small-to-moderate magnitude illustrates that physics-based methods can presently provide accuracy precision comparable to, often exceeding, those from conventional empirical models. This predictive confidence enables the possibility simulation-based probabilistic seismic hazard analyses, which...