Preliminary observations of the effects of the 2010 Darfield earthquake on the base-isolated Christchurch Women's Hospital
DOI:
https://doi.org/10.5459/bnzsee.43.4.360-367Abstract
The Christchurch Women's Hospital, completed in March 2005, is the only base-isolated building in the South Island of New Zealand. The displacement capacity of the base-isolation system and the super-structure ductility capacity are designed to meet 2000-year return-period demands. Detailed structural evaluations after the 2010 Darfield Earthquake revealed damage only to sacrificial non-structural components at the seismic gaps. Because the structure is not instrumented, basic design information and ground motion records from nearby sites are used to estimate the responses to the main shock and a large after-shock. Results from this modelling effort are used to corroborate reports of structural response from staff present at the time of the main shock and aftershocks. Issues meriting further investigation are related to the local site conditions, soil-structure interaction, super-structure dynamics, interaction with the adjacent structures, and large-deformation effects.
References
Skinner, R.I., and McVerry, G.H. (1975), “Base Isolation for Increased Earthquake Resistance of Buildings,” Bulletin of the New Zealand National Society for Earthquake Engineering, 8(2): 93-101.
Robinson, W.H., (1977), “A Lead-Rubber Shear Damper,” Bulletin of the New Zealand National Society for Earthquake Engineering, 10(3): 151-153.
Robinson, W.H., (1982), “Lead-Rubber Hysteretic Bearings Suitable for Protecting Structures During Earthquakes,” Earthquake Engineering and Structural Dynamics, 10:593-604. DOI: https://doi.org/10.1002/eqe.4290100408
Skinner, R.I, Robinson, W.H. and McVerry, G.H., (1996), An Introduction to Seismic Isolation, Wiley.
Naeim, F., and Kelly, J.M., (1999), “Design of Seismic Isolated Structures – From theory to practice,” John Wiley. Figure 12: Dependence of sloshing frequency of birthing tubs on water depth. Figure 13: Dependence of sloshing amplitude on water depth and lateral floor displacement, D. Floor motion period = 2.1 s DOI: https://doi.org/10.1002/9780470172742
Fujita, T. (2005), “State of the art on application of seismic isolation to civil and industrial structures in Japan”, 9th World Seminar on Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures, Japan Association for Vibration Technologies, Kobe, Japan, June 13-16.
Chang, K-C. and Hwang, J-S. (2005), “State of the art on application, R&D and design rules for seismic isolation and energy dissipation for civil structures in Taiwan”, 9th World Seminar on Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures, Japan Association for Vibration Technologies, Kobe, Japan, June 13-16.
Megget, L.M., (1978), “Analysis and Design of a Base-Isolated Reinforced Concrete Frame Building,” Bulletin of the New Zealand National Society for Earthquake Engineering, 11(12): 245-254.
Alquist, A.E., (1994), State of California Senate Bill 1953, http://www.leginfo.ca.gov/pub/93-94/bill/sen/sb_1951-2000/sb_1953_bill_940922_chaptered_22_September_1994. Accessed 30 Oct. 2010.
Asher, J.W., Young, R.P. and Ewing, R.D., (1996), “Seismic Isolation Design of the San Bernardino County Medical Center Replacement Project,” The Structural Design of Tall Buildings, 5: 265-279. DOI: https://doi.org/10.1002/(SICI)1099-1794(199612)5:4<265::AID-TAL77>3.0.CO;2-X
Celebi, M., (1996), “Successful Performance of a Base-Isolated Building During the 17 January 1994 Northridge Earthquake,” The Structural Design of Tall Buildings, 5: 95-109. DOI: https://doi.org/10.1002/(SICI)1099-1794(199606)5:2<95::AID-TAL71>3.0.CO;2-7
Nagarajaiah, S. and Sun, X., (2000), “Response of Base-Isolated USC Hospital in Northridge Earthquake,” J. of Structural Engineering, 126 (10): 1177-1186. DOI: https://doi.org/10.1061/(ASCE)0733-9445(2000)126:10(1177)
Earthquake Engineering Research Institute (1994), Northridge Earthquake, January 17, 1994, Preliminary Reconnaissance Report, John Hall, ed., Publication Number 94-01, Oakland California, 1994.
Oiles (2010), http://www.oiles.co.jp/en/menshin/data/001.html accessed 30 Oct. 2010.
Clark, P.W., Aiken, I.D., Nakashima, M., Miyazaki, M. and Midorikawa, M. (2000), “The 1995 Kobe (Hyoko-Ken Nanbu) earthquake as a trigger for implementing new seismic design technologies in Japan”, Lessons Learned Over Time, Learning from Earthquakes Series: III. Earthquake Engineering Research Institute, Oakland, CA.
Turner, F.M. (2008), “Observations of the M7.9 Wenchuan China Earthquake of May 12, 2008 in Gansu Province and parts of Northern Sichuan Province,” private communication 10 Nov. 2010.
MacKenzie, A. (2006), ``Christchurch Women's Hospital: A Study In Resilience,” e.nz magazine, March/April 2006, 3-9.
Haverland, G. (2005), “Christchurch Women's Hospital,” J. Structural Engineering Society of New Zealand, 18(1): 66-71.
Park, Y.J., Wen, Y.K. and Ang, A.H-S., (1986), “Random Vibration of Hysteretic Systems under Biaxial Ground Motion,” Earthquake Engineering and Structural Dynamics, 14: 543-557. DOI: https://doi.org/10.1002/eqe.4290140405
GNS Science (2010), ftp://ftp.geonet.org.nz/strong/processed/Proc/2010/ accessed 30 October 2010.
Fuller, K.N.G, Gough, J., Pond, T.J. and Ahmadi H.R., (1997), “High Damping Natural Rubber Seismic Isolators,” J. Structural Control, 4(2): 19-40. DOI: https://doi.org/10.1002/stc.4300040202
Song, J-K. and Gavin, H.P., (2010), “Effect of hysteretic smoothness on inelastic response spectra with constant ductility,” Earthquake Engineering and Structural Dynamics, DOI: 10.1002/eqe.1058 DOI: https://doi.org/10.1002/eqe.1058
Housner, G.W., (1963), “The dynamic behavior of water tanks,” Bulletin of the Seismological Society of America, 53(2): 381-387.
Patkas, L.A. and Karamanous, S.A., (2007), “Variational Solutions for Externally Induced Sloshing in Horizontal-Cylindrical and Spherical Vessels,” J. Engineering Mechanics, 133(6): 641-655. DOI: https://doi.org/10.1061/(ASCE)0733-9399(2007)133:6(641)
Irwin, A.W. (1981), “Perception, Comfort, and Performance Criteria for Humans Exposed to Whole Body Pure Yaw Vibration and Vibration Containing Yaw and Translational Components,” J. Sound and Vibration, 76(1): 481-497. DOI: https://doi.org/10.1016/0022-460X(81)90265-0
Kwok, K.C.S., Hitchcock P.A. and Burton, M.A., (2009), “Perception of vibration and occupant comfort in wind-excited tall buildings,” J. Wind and Ind. Aerodynamics, 97: 368-380. DOI: https://doi.org/10.1016/j.jweia.2009.05.006
Pozos-Estreda, A., Hong, H.P, and Galsworthy, J.K, (2010), “Serviceability Design Factors for Wind Sensitive Structures,” Can. J. Civil Engineering, 37: 728-738. DOI: https://doi.org/10.1139/L10-013
Spyrakos, C.C., Koutromanous, I.A. and Maniatakis, Ch.A. (2009), “Seismic response of base-isolated buildings including soil-structure interaction,” Soil Dynamics and Earthquake Engineering, 29: 658-668. DOI: https://doi.org/10.1016/j.soildyn.2008.07.002
Stehmeyer, E.H. (III) and Rizos, D.C., (2008), “Considering dynamic soil structure interaction (SSI) effects on seismic retrofit efficiency and the importance of natural frequency ratio,” Soil Dynamics and Earthquake Engineering, 28: 468-479. DOI: https://doi.org/10.1016/j.soildyn.2007.07.008
