Seismological, Soil and Valley Effects in Kirovakan, 1988 Armenia Earthquake
Publication: Journal of Geotechnical Engineering
Volume 120, Issue 2
Abstract
There is substantial evidence that the city of Kirovakan, Armenia, despite its proximity (10 km) to the fault, experienced in general very small intensity of shaking during the 1988 earthquake. Moreover, the distribution of damage in the city was very nonuniform. In this paper, first, arguments are presented to show that seismological and geologic factors, relating to the generation and transmission of the seismic waves, could explain the unusually weak base excitation in Kirovakan. Then, the results of one‐dimensional (1D) wave‐propagation analysis, using soil profiles with field and laboratory measured parameters, are presented to explain the damage statistics in five zones into which the city was divided. 1D analyses of wave amplification in soil are found to provide adequate answers for zones where the underlying soils consist of less than 30 m dense gravelly sands and stiff clays. However, such analyses fail to explain the disproportionately large degree of damage observed only in one region, where soil profile constitutes a triangular sedimentary basin with maximum soil depth of about 150 m and width‐to‐depth ratio of about 5. A simplified three‐dimensional wave‐propagation analysis of the “valley” effects on ground‐surface motions, provides a better explanation of the observed damage.
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References
1.
Aki, K., and Richards, P. G. (1980). Quantitative seismology. W. H. Freeman, New York, N.Y.
2.
Brune, J. N. (1976). “The physics of earthquake strong motions.” Seismic Risk and Engrg. Decisions, C. Lomnitz and E. Rosenblueth, eds., Elsevier Science Publishers, Amsterdam, The Netherlands, 141–177.
3.
Gazetas, G., Tazoh, T., Shimizu, K., and Fan, K. (1993). “Seismic response of the pile foundation of Ohbo‐Ohashi bridge.” Proc. 3rd Int. Conf. on Case Histories in Geotech. Engrg., 3, 1703–1709.
4.
Joyner, W. B., and Boore, D. M. (1988). “Measurement, characterization, and prediction of strong ground motion.” Proc. Earthq. Engrg. and Soil Dyn., J. L. Von Thun, ed., ASCE, New York, N.Y., 43–102.
5.
Lee, V. W. (1984). “Three‐dimensional diffraction of plane P, SV and SH waves by a hemispherical alluvial valley.” Soil Dyn. and Earthquake Engrg., 3, 133–144.
6.
Papageorgiou, A. S., and Kim, J. (1991). “Study of propagation and amplification of seismic waves in Caracas valley with reference to the 29 July 1967 earthquake: SH waves.” Bull. Seism. Soc. Am., 81(6), 2214–2233.
7.
Roesset, J. M. (1977). “Soil amplification in earthquakes.” Num. Meth. in Geotech. Engrg., Desai and Christian, eds., McGraw‐Hill, New York, N.Y., 639–682.
8.
Sanchez‐Sesma, F. J., Campillo, M., Bard, P. Y., Gariel, J. C., and Aki, K. (1989). “The great 1985 Michoacan earthquake: a unified approach considering source, path, and site effects.” Engineering Seismic and Site Response, Computational Mechanics Publishers, Southampton, U.K., 43–75.
9.
Sanchez‐Sesma, F. J., Chavez‐Garcia, F. J., and Bravo, M. A. (1988).“Seismic response of a class of alluvial valleys for incident SH waves.” Bull. Seism. Soc. Am., 78(1), 83–95.
10.
Schnabel, P. B., Lysmer, J., and Seed, H. B. (1972). “SHAKE: a computer program for earthquake response analysis of horizontally layered sites,” Rep. No. EERC 72‐12, Earthquake Engineering Research Center, University of California, Berkeley, Berkeley, Calif.
11.
Seed, H. B., and Idriss, I. M. (1982). “Ground motions and soil liquefaction during earthquakes.” Monograph Series, Earthquake Engineering Research Institute, Palo Alto, Calif.
12.
Seed, H. B., and Idriss, I. M. (1970). “Soil moduli and damping factors for dynamic response analysis,” Rep. No. EERC 70‐10, Earthquake Engineering Research Center, University of California, Berkeley, Berkeley, Calif.
13.
Seed, H. B., Idriss, I. M., and Dezfulian, H. (1970). “Relationships between soil conditions and building damage in the Caracas earthquake of July 29, 1967,” Rep. No. EERC 70‐2, Earthquake Engineering Research Center, University of California, Berkeley, Berkeley, Calif.
14.
Trifunac, M. D. (1971). “Surface motion of a semicylindrical alluvial valley for incident plane SH waves.” Bull. Seism. Soc. Am., 61(6), 1755–1770.
15.
Vucetic, M., and Dobry, R. (1991). “Effect of soil plasticity on cyclic response.” J. Geotech. Engrg., ASCE, 117(1), 89–107.
16.
Yegian, M. K., Ghahraman, V. G., and Gazetas, G. (1994a). “1988 Armenia earthquake, I: seismological, geotechnical and structural overview.” J. Geotech. Engrg., ASCE 120(1), 1–20.
17.
Yegian, M. K., Ghahraman, V. G., and Gazetas, G. (1994b). “1988 Armenia earthquake, II: damage statistics versus geologic and soil profiles.” J. Geotech. Engrg., ASCE, 120(1), 21–45.
18.
Yegian, M. K., Ghahraman, V. G., and Gazetas, G. (1994c). “Ground‐motion and soil‐response analyses for Leninakan, 1988 Armenia earthquake.” J. Geotech. Engrg., ASCE, 120(2), 330–348.
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Published In
Journal of Geotechnical Engineering
Volume 120 • Issue 2 • February 1994
Pages: 349 - 365
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Aug 14, 1992
Published online: Feb 1, 1994
Published in print: Feb 1994
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