Abstract The recent update to the National Seismic Hazard Model has changed the approach to seismic site classification in New Zealand, with the time-averaged shear wave velocity over the top 30 m of the subsurface profile (VS30) at a site now being a key site…
ABSTRACT The accurate knowledge of the geological, geotechnical, geophysical and geometrical characteristics of soil conditions at urban area, usually obtained through microzonation studies, is generally important to the seismic hazard and risk assessment, and consequently for decision-making with respect to the reduction of earthquake-induced losses…
Jacobs Ladder – A Case-History of Debris Flow in a Post-Seismic Environment T.R. Justice NCTIR/ENGEO, Christchurch. ABSTRACT An increase in debris flows, and other slope stability events, over the short to medium term following significant seismic events is well recorded in international literature. The 2018…
1.0 Introduction A revision project for the New Zealand National Seismic Hazard Model (NSHM) has recently commenced. In this project, funded by the Ministry of Business, Innovation and Employment (MBIE) and the Earthquake Commission (EQC), we expect to deliver a revised NSHM by 31 August…
Abstract This paper describes the geotechnical aspects of a collaborative seismic assessment and foundation strengthening design for an existing building in the Tauranga CBD. The reinforced concrete 6 storey high structure is supported on concrete piles founded on potentially liquefiable volcanic soils. Initial assessments concluded…
This article was originally presented at ANCOLD (2017) Conference, Hobart Haldon Dam is a 15 m high zoned earth-fill embankment irrigation dam, located approximately 10 km south-west of Seddon, in the Awatere Valley, New Zealand. The crest and upstream shoulder of the embankment suffered serious…
Abstract In fulfilling its vision and purpose Lyttelton Port of Christchurch (LPC) intends to create new land in Te Awaparahi Bay through a land development programme. The programme involves reclamation of approximately 34ha of new land and the construction of a new 700m wharf, to…
The purpose of this paper is to evaluate the provisions of the New Zealand structural design actions standard (NZS 1170.5 (2004)) with respect to classical elastic soil-structure interaction effects on the earthquake design of shallow foundations supporting multi-storey buildings. Work by earlier researchers had led to the suggestion…
The current practice in New Zealand for seismic design of shallow foundations is to ensure the LRFD inequality is satisfied, meaning not all of the available bearing strength is mobilised. However, the occurrence of bearing failure may be acceptable, provided the resulting permanent displacements are also…