Assessment and Restoration of An Earthquake-Damaged Sports Stadium in New Zealand


Abstract eng:
The Lancaster Park (formerly AMI) stadium spectator stands in Christchurch, New Zealand were of modern reinforced concrete design and construction, with the two larger stands supported on stone-column foundations. This paper summarises the damage that occurred as a result of the Canterbury earthquake sequence (CES) of 2010-2011 and the engineering assessments that were carried out. The Canterbury earthquake sequence included several strong and damaging ground motions, with the most severe shaking being from the 22 February 2011 magnitude Mw6.3 event at an epicentral distance of only 6km from the stadium. That event resulted in peak ground accelerations at the stadium site of approximately 0.5g horizontally and 0.75g vertically. Damage to the stands included bulging, loosening and contamination of the stone column foundations, global and differential settlement of the structures, and structural damage including extensive cracking of concrete, yielding and strain damage (and in some cases fracture) of reinforcement. Engineering assessments included mapping of observed damage, material testing and analytical damage predictions. The earthquake damage was assessed to have left the structures and foundations with a loss of capacity, reduced performance and uncertain future. One of the smaller stands was considered to be unsafe and the authorities required it to be demolished. The likely scope of repairs for the three remaining stadium structures and their foundations is conceptually described, but the cost and viability of such repairs have not yet been established.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 914.:
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