Response of instrumented buildings under the 2016 Kaikoura earthquake

  • Reagan Chandramohan University of Canterbury, Christchurch, New Zealand https://orcid.org/0000-0003-1307-6197
  • Quincy Ma University of Auckland, Auckland, New Zealand
  • Liam M. Wotherspoon University of Auckland, Auckland, New Zealand
  • Brendon A. Bradley University of Canterbury, Christchurch, New Zealand https://orcid.org/0000-0002-4450-314X
  • Mostafa Nayyerloo GNS Science, Lower Hutt, New Zealand
  • S. R. Uma GNS Science, Lower Hutt, New Zealand
  • Max T. Stephens University of Auckland, Auckland, New Zealand

Abstract

Six buildings in the Wellington region and the upper South Island, instrumented as part of the GeoNet Building Instrumentation Programme, recorded strong motion data during the 2016 Kaikoura earthquake. The response of two of these buildings: the Bank of New Zealand (BNZ) Harbour Quays, and Ministry of Business, Innovation, and Employment (MBIE) buildings, are examined in detail. Their acceleration and displacement response was reconstructed from the recorded data, and their vibrational characteristics were examined by computing their frequency response functions. The location of the BNZ building in the CentrePort region on the Wellington waterfront, which experienced significant ground motion amplification in the 1–2 s period range due to site effects, resulted in the imposition of especially large demands on the building. The computed response of the two buildings are compared to the intensity of ground motions they experienced and the structural and nonstructural damage they suffered, in an effort to motivate the use of structural response data in the validation of performance objectives of building codes, structural modelling techniques, and fragility functions. Finally, the nature of challenges typically encountered in the interpretation of structural response data are highlighted.

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Published
2017-06-30
How to Cite
Chandramohan, R., Ma, Q., Wotherspoon, L. M., Bradley, B. A., Nayyerloo, M., Uma, S. R., & Stephens, M. T. (2017). Response of instrumented buildings under the 2016 Kaikoura earthquake. Bulletin of the New Zealand Society for Earthquake Engineering, 50(2), 237-252. https://doi.org/10.5459/bnzsee.50.2.237-252
Section
Articles

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