Proceedings of the 2024 New Zealand Society for Earthquake Engineering Annual Technical Conference: Recent submissions
Now showing items 41-60 of 103
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Performance-based Assessment and Seismic Strengthening of the Christ Church Cathedral
(2024-04-09)The Christ Church Cathedral is a significant landmark for New Zealand. It was severely damaged in the 2011 Canterbury earthquakes – the Tower and Rose Window/western façade of the Cathedral suffered partial collapses while ... -
Experimental Testing of Brittle RC frames Strengthened by RSFJ-toggle bracing system
(2024-04-09)This paper investigates the performance of the new retrofitting system, consisting of self-centering damper resilient slip friction joint (RSFJ)-toggle bracing system, as a global retrofitting method for deficient RC frame ... -
Improving structural performance of an existing EBF and moment frame structure using fluid viscous dampers
(2024-04-09)Improving the performance of existing buildings is a critical function for engineers and one of the most impactful ways we can improve the sustainability of buildings. By re-using and upgrading existing building stock, we ... -
Application of Low Damage Tension Braces in Top Extensions of Existing Buildings: A Case Study for Seismic Upgrade
(2024-04-09)Tension-only braces are generally used as diagonal cross members (rods, flat bars or similar) to resist lateral loads. The application of these braces has been limited to low-rise buildings (generally up to two stories) ... -
Shallow Shear Wave Reflection Surveys in the Wellington CBD
(2024-04-09)Seismic reflection profiles using shear waves provide constraints on the thickness of sediments beneath the Wellington CBD. New shear wave source and acquisition methods were trialled for use in urban environments to ... -
Comparing alternative methods to account for shallow site effects in hybrid broadband ground-motion simulations
(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 ... -
Earthquake scaling relations, and testing and evaluation of the New Zealand National Seismic Hazard Model 2022.
(2024-04-09)We summarise two projects that contributed to the development of the New Zealand National Seismic Hazard Model 2022 (NZ NSHM 2022). First, we summarise the development of new magnitude-source area scaling relations for ... -
Impacts of ground motion and scaling method selection on the performance of rocking wall systems with friction connections
(2024-04-09)Dynamic time-history analysis has long been regarded as an acceptable and reliable method for seismic design of structures not covered by codal guidelines and often referred to as "alternative" design. Resilient rocking ... -
Urban Geophysics and Seismic Hazard Assessment in the Wellington CBD
(2024-04-09)Many of our cities are built on sedimentary basins. Both the depth and shape of the basin will influence, and generally enhance the level of shaking. Our focus is the Wellington CBD, where we use seismic reflection and ... -
Testing the cyclic strain softening behaviour of an ageing puddled clay core dam
(2024-04-09)Seismic resilience of the 150-year-old Ross Creek puddled clay core water supply dam in Dunedin has recently been enhanced through a programme of refurbishment. The very low permeability moderately plastic soils comprising ... -
Analysis of Site-Response Residuals from Empirical Ground-Motion Models to Account for Observed Sedimentary Basin Effects in Wellington, New Zealand
(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 ... -
Highbank Power Station Redevelopment – Design Process for a Concrete Encased Turbine and Generator Plinth Replacement
(2024-04-09)Manawa Energy, a renewable energy provider in New Zealand, operates a network of 26 power schemes from the Bay of Plenty in the North to Otago in the South. The Highbank Power Station stands as one of Manawa’s highest ... -
Dynamic Shaking Layer models for large New Zealand earthquakes (M6.5+): from rapid source characterization to landslide and impact forecasting
(2024-04-09)GNS Science has developed a new Shaking Layers tool to rapidly deliver near-real time ground shaking maps for New Zealand, available directly through GeoNet. Shaking Layers combines observed strong motion data with ground ... -
Multi-scenario approach for the assessment of liquefaction exposure and impact across New Zealand State Highways
(2024-04-09)Events such as the 2010-2011 Canterbury Earthquake Sequence or the 2016 Kaikōura earthquake demonstrated the impacts of liquefaction and lateral spreading across New Zealand infrastructure networks. Statistical liquefaction ... -
Non-contact Structural Damage Detection by Natural Frequency Measurement using Microphone
(2024-04-09)Structural Damage Detection methods are crucial for infrastructure maintenance. The general principle involves the identification of changes in natural frequencies induced by stiffness reductions. This paper introduces an ... -
Estimation of electricity supply restoration time with interdependencies under cascading hazard risk approach
(2024-04-09)The electricity infrastructure network functions as a system with several components interconnected and distributed over a region. When subjected to earthquake and its related cascading hazards, the vulnerable components ... -
Omāroro Reservoir: A Case Study. It’s Cheaper to Work with Nature
(2024-04-09)By all accounts, Wellington, New Zealand is a challenging seismic environment for the design and construction of infrastructure. In recent years, this challenge has increased with our deeper understanding of Aotearoa’s ... -
Applicability of existing CPT-Vs correlations to direct-push crosshole and cone penetration test data for shallow Holocene-aged New Zealand soil deposits
(2024-04-09)A number of empirical correlations have been proposed to estimate shear wave velocity (Vs) using cone penetration test (CPT) data as a result of the growing availability of global databases. The performance of four existing ... -
Resin Injection ground improvement for liquefaction mitigation at Poverty Bay Rugby Club, Gisborne
(2024-04-09)Gisborne is located near the Hikurangi Subduction Zone which contributes to a significant amount of the seismic activity in New Zealand. This coupled with Gisborne’s soil profile consisting of liquefiable sands has resulted ... -
Geotechnical design for severe liquefiable ground improvement with SCRR technique: Waikato case study
(2024-04-09)This paper introduces an innovative earthquake geotechnical design approach for severe liquefiable ground, adopting ground improvement using the patented Subsurface Compacted Rubble Raft (SCRR) technology in a Waikato ...