Effect of Superstructure Stiffness on Liquefaction-Induced Failure Mechanisms

S.P.G. Madabhushi and S.K. Haigh
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S.P.G. Madabhushi: University of Cambridge, UK
S.K. Haigh: University of Cambridge, UK

International Journal of Geotechnical Earthquake Engineering (IJGEE), 2010, vol. 1, issue 1, 70-87

Abstract: Soil liquefaction following strong earthquakes causes extensive damage to civil engineering structures. Foundations of buildings, bridges etc can suffer excessive rotation/settlement due to liquefaction. Many of the recent earthquakes bear testimony for such damage. In this article a hypothesis that “Superstructure stiffness can determine the type of liquefaction-induced failure mechanism suffered by the foundations” is proposed. As a rider to this hypothesis, it will be argued that liquefaction will cause failure of a foundation system in a mode of failure that offers least resistance. Evidence will be offered in terms of field observations during the 921 Ji-Ji earthquake in 1999 in Taiwan and Bhuj earthquake of 2001 in India. Dynamic centrifuge test data and finite element analyses results are presented to illustrate the traditional failure mechanisms.

Date: 2010
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