About the Report
After the 2010–2011 Canterbury earthquakes, much of the Christchurch Central Business District (CBD) was demolished, and a new city has emerged in its place. From a structural engineering perspective, to date, the new "heart" of Christchurch is quite different from the old one. Where reinforced concrete buildings dominated the urban landscape, with almost all multistory buildings relying on RC frames or walls to resist earthquake shaking, the emerging Christchurch has a variety of structural forms, an extensive amount of steel structures, and a number of structural systems introduced to make the new buildings of Christchurch more seismically resilient.
This report describes a study conducted to (a) quantify the extent to which various types of structural system have been used in the new buildings constructed by early 2017, and (b) identify some of the drivers that have influenced decisions about the selection of structural material and specific structural systems used. The study involved a series of interviews with the structural designers of more than 60% of the post-earthquake buildings constructed to date in Christchurch's CBD (i.e., 74 buildings), as well as with engineers from Wellington and Auckland, an architect, a project manager, and a developer. Data was also collected from various sources (including Christchurch's City Council database), and quantitative information on structural forms and decision drivers has been assembled for the 74 buildings considered.
This report is useful in providing insights into some of the mechanisms that can dictate structural engineering decisions during the post-earthquake reconstruction of a modern city.
The Christchurch experience may be unique today, but it could repeat itself in other similarly developed cities worldwide after future devastating earthquakes.
And each time history repeats itself, the price goes up.
Media Coverage
2016 Interviews on Project Objectives (prior to study)
Chinese Translation
14 Years After
The shift in momentum reported in the original study was of significant interest to engineers in other modern cities located in seismic active parts of the world, and we have often been asked if the trends reported in this early work have persisted over time, or if things have evolved differently in new emerging directions. The open source paper "The Christchurch post-earthquake reconstruction – Year 14 update" reports recently conducted work to answer this question, akin to a longitudinal study, but less formally so. This is most timely as Christchurch will soon reach the 15-year mark since the earthquake and reconstruction has progressed significantly.
Read Open Access PaperAbout the Authors
Description from report insert
Related Interesting Media Links
Comm. Canterbury Earthquake Royal Commission