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Liquefaction during the 1990 Manjil, Iran, earthquake, I: Case history data

Department of Civil Engineering Northeastern University, Boston, Massachusetts 02115
Geological Survey of Iran, and Department of Civil Engineering University of Tehran, Tehran, Iran
Consulting Geotechnical Engineer, Tehran, Iran

Abstract

During the 1990 Manjil, Iran, earthquake (M_S = 7.7), an estimated 35,000 people lost their lives and more than 300,000 were left homeless. The earthquake ground shaking caused enormous destruction of unreinforced structures. In addition, widespread liquefaction contributed significantly to building damage in towns as far away as 85 km from the ruptured fault. Following the earthquake, the authors surveyed the liquefaction regions, conducted geotechnical field explorations, and documented case histories on liquefaction of level ground, liquefaction-induced building settlement, permanent ground displacement, and performance of piles and piers in liquefied soils. This article presents and discusses the data of the case histories investigated. In addition, based on the evidence from the Manjil earthquake, the importance of geologic input in mapping of liquefaction potential in earthquake-prone regions is demonstrated. In the companion article, the authors present the results of their analyses of liquefaction-related case histories.

This article has been cited by other articles:

				M. K. Yegian, V. G. Ghahraman, M. A. A. Nogole-Sadat, and H. Daraie Liquefaction during the 1990 Manjil, Iran, earthquake, II: Case history analyses Bulletin of the Seismological Society of America, February 1, 1995; 85(1): 83 - 92. [Abstract] [PDF]