Damage ratios for low-rise non-domestic brick buildings in the magnitude 7.1 Wairarapa, New Zealand, earthquake of 24 June 1942

  • D.J. Dowrick GNS Science, Lower Hutt, New Zealand
  • D.A. Rhoades GNS Science, Lower Hutt, New Zealand

Abstract

An analysis of damage costs to low-rise non-domestic brick buildings in the MM8 intensity zone of the Mw 7.1 Wairarapa earthquake of 24 June 1942 has evaluated the vulnerability of such buildings in New Zealand for the first time. The buildings studied were mostly of unreinforced brick of average workmanship and material quality, i.e. the second most vulnerable class of New Zealand buildings. Approximate vulnerabilities were also determined for partly reinforced and partly retrofitted buildings, and for one and two-storey buildings. The costs of damage were derived from insurance claims and local government records. The indicators of vulnerability that were determined were the statistical distributions and mean values of damage ratios, and the percentage of buildings damaged. Comparisons have also been made with results from studies of other earthquakes.

References

Downes G.L, Dowrick D.J., van Dissen R.J., Taber J.J., Hancox G.T. and Smith E.G.C. (2001), "The 1942 Wairarapa, New Zealand, earthquakes: analysis of observational and instrumental data". Bulletin NZ Society of Earthquake Engineering, 34(2), 125-127. DOI: https://doi.org/10.5459/bnzsee.34.2.125-157

Dowrick D.J. and Rhoades D.A. (1998), "Magnitudes of New Zealand earthquakes, 1901 - 1993", Bulletin NZ National Society for Earthquake Engineering, 31(4), 260- 280. DOI: https://doi.org/10.5459/bnzsee.31.4.260-280

Doser D.I. and Webb T.H., "Source parameters of large historic (1917-1961) earthquakes, North Island, New Zealand", (in prep).

Dowrick D.J. (1991), "Damage costs for houses and farms as a function of intensity in the 1987 Edgecumbe earthquake". Earthquake Engineering and Structural Dynamics, 20: 455-469. DOI: https://doi.org/10.1002/eqe.4290200506

Dowrick D.J., Rhoades D.A., Babor J. and Beetham R.D. (1995), "Damage ratios and microzoning effects for houses in Napier at the centre of the magnitude 7.8 Hawke's Bay, New Zealand, earthquake of 1931". Bulletin New Zealand National Society for Earthquake Engineering, 28(2): 134-145. DOI: https://doi.org/10.5459/bnzsee.28.2.134-145

Dowrick D.J. and Rhoades D.A. (1997), "Vulnerability of different classes of low-rise buildings in the 1987 Edgecumbe, New Zealand, earthquake". Bulletin New Zealand National Society for Earthquake Engineering, 30(3): 227-241. DOI: https://doi.org/10.5459/bnzsee.30.3.227-241

Dowrick D.J. and Rhoades D.A. (1997), "Inferences for design, insurance and planning from damage evaluation in past New Zealand earthquakes". Journal of Earthquake Engineering, 1(1): 77-91. DOI: https://doi.org/10.1080/13632469708962362

Rhoades D.A. and Dowrick D.J. (1999), "Variability of damage ratios for property in earthquakes". Earthquake Spectra, 15(2): 297-316. DOI: https://doi.org/10.1193/1.1586042

Dowrick DJ., Rhoades D.A. and Davenport P.N. (2001), "Damage ratios for domestic property in the magnitude 7.2 1968 lnangahua, New Zealand, earthquake". Bulletin NZ Society for Earthquake Engineering, 34(3): 191-213. DOI: https://doi.org/10.5459/bnzsee.34.3.191-213

Dowrick D.J. (1996), "The Modified Mercalli earthquake intensity scale - Revisions arising from recent studies of New Zealand earthquakes". Bulletin New Zealand Society for Earthquake Engineering, 29(2): 92-106. DOI: https://doi.org/10.5459/bnzsee.29.2.92-106

Downes G., Dowrick D.J., Smith E. and Berryman K. (1999), "The 1934 Pahiatua earthquake sequence: Analysis of observational and instrumental data". Bulletin NZ Society for Earthquake Engineering, 32(4): 221-245. DOI: https://doi.org/10.5459/bnzsee.32.4.221-245

Harris A.G. and Bums D.J. (1942), "Earthquake Damage". Unpublished Reports by Borough Surveyors, prepared for C.R. Mabson, Borough Engineer, on non- domestic buildings in the Borough of Masterton, 2nd July and 17th July, plus addenda dated 2211d August 1942.

McVerry G.H., Zhao J.X., Abrahamson N.A. and Somerville P.O. (2000), "Crustal and subduction zone attenuation relations for New Zealand". Proceedings 12th World Conference on Earthquake Engineering, Auckland, Paper No. 1834.

Dowrick D.J. and Rhoades D.A. (1993), "Damage costs for commercial and industrial property as a function of intensity in the 1987 Edgecumbe earthquake". Earthquake Engineering and Structural Dynamics, 22: 869-884. DOI: https://doi.org/10.1002/eqe.4290221004

MathSoft (1998), S-Plus 5 for Unix Guide to Statistics. Data Analysis Products Division, MathSoft, Seattle, 1014 pp.

Dowrick D.J. and Rhoades D.A. (1995), "Damage ratios for plant, equipment and stock in the 1987 Edgecumbe, New Zealand earthquake". Bulletin NZ National Society for Earthquake Engineering, 28(4): 265-278. DOI: https://doi.org/10.5459/bnzsee.28.4.265-278

Rutherford & Chekene (Lizundia, et al.) (1991), "Damage to unreinforced masonry buildings in the October 17, 1989 Loma Prieta earthquake". Report for the National Science Foundation and California Seismic Safety Commission.

Published
2002-09-30
How to Cite
Dowrick, D., & Rhoades, D. (2002). Damage ratios for low-rise non-domestic brick buildings in the magnitude 7.1 Wairarapa, New Zealand, earthquake of 24 June 1942 . Bulletin of the New Zealand Society for Earthquake Engineering, 35(3), 135-148. https://doi.org/10.5459/bnzsee.35.3.135-148
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Articles