Performance Evaluation of CWH Base Isolated Building During Two Major Earthquakes in Christchurch

Type of content
Journal Article
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Publisher
University of Canterbury. Mechanical Engineering
Journal Title
Journal ISSN
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Date
2015
Authors
Zhou, Cong
Chase, Geoff
Rodgers, G.W.
Kuang, A.
Gutschmidt, S.
Xu, C.
Abstract

The seismic performance and parameter identification of the base isolated Christchurch Women’s Hospital (CWH) building are investigated using the recorded seismic accelerations during the two large earthquakes in Christchurch. A four degrees of freedom shear model is applied to characterize the dynamic behaviour of the CWH building during these earthquakes. A modified Gauss-Newton method is employed to identify the equivalent stiffness and Rayleigh damping coefficients of the building. The identification method is first validated using a simulated example structure and finally applied to the CWH building using recorded measurements from the Mw 6.0 and Mw 5.8 Christchurch earthquakes on December 23, 2011. The estimated response and recorded response for both earthquakes are compared with the cross correlation coefficients and the mean absolute percentage errors reported. The results indicate that the dynamic behaviour of the superstructure and base isolator was essentially within elastic range and the proposed shear linear model is sufficient for the prediction of the structural response of the CWH Hospital during these events.

Description
Citation
Zhou, C., Chase, J.G., Rodgers, G.W., Kuang, A, Gutschmidt, S., Xu, C. (2015) Performance Evaluation of CWH Base Isolated Building During Two Major Earthquakes in Christchurch. Bulletin of the New Zealand Society for Earthquake Engineering, 48(4), pp. 264-273.
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Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
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