NZGS and the Module 1 authors ran a live webinar on Module 1, Version 1 on 7 July 2022. The webinar included: Overview of the Module by Prof. Misko Cubrinovski, University of Canterbury. Overview of how the NZSEE, SESOC and NZGS advisory “Designing for Uncertainty…
Introduction The document, “The Seismic Assessment of Existing Buildings” July 2017 (The Guidelines) provides a technical basis for engineers to carry out seismic assessments of existing buildings in New Zealand. The Guidelines support seismic assessments for a range of purposes, including whether or not a…
Abstract Wellington’s waterfront is in demand for new developments due to its proximity to the central business district, infrastructure, and harbour. This area can be impacted on by several hazards like earthquake shaking, liquefaction and lateral spread, see level rise and tsunami (tsunami not considered…
Clause B1/VM4 of the New Zealand Building Code allows a concession on strength reduction factors applied to foundation design for load cases involving earthquake load combinations with overstrength factors. It allows strength reduction factors of 0.8 to 0.9 compared to 0.45 to 0.60 typically specified for other load…
Liquefaction induced lateral spreading associated with the Canterbury earthquakes of 2010 and 2011 has resulted in significant damage to numerous riverside properties in Christchurch. A number of methods for mitigating lateral spreading risk exist; these often involve ground improvement adjacent to the free face. Preliminary design using a…
Gravelly soil (i.e. gravelly sands, sandy gravels, and uniform gravels) is generally recognized to have no or very low liquefaction potential. However, historically few case histories exist where observations of liquefied gravelly soils have been made, e.g. 1983 Borah Peak, Idaho earthquake (Youd et al….
The sliding block model proposed by Newmark (1965) is an accepted methodology for assessing the accumulated displacement of a soil slope during an earthquake. For slopes restrained by elastic structural elements, such as geotextile reinforcement or ground anchors, the assumptions behind the Newmark block model may…
