BUILDING FOUNDATION INSTABILITY INDUCED BY TSUNAMI SCOUR

Mara Jauane Nicholas; Ravindra Jayaratne; Takayuki Suzuki; Tomoya Shibayama

doi:10.9753/icce.v36v.currents.29

No. 36v (2020), Swash, Nearshore Currents, and Long Waves

No. 36v (2020)

BUILDING FOUNDATION INSTABILITY INDUCED BY TSUNAMI SCOUR

Swash, Nearshore Currents, and Long Waves

https://doi.org/10.9753/icce.v36v.currents.29

Published 2020-12-28

Mara Jauane Nicholas
Ravindra Jayaratne
Takayuki Suzuki
Tomoya Shibayama

Mara Jauane Nicholas

https://orcid.org/0000-0002-7334-0167

Ravindra Jayaratne

https://orcid.org/

Takayuki Suzuki

Tomoya Shibayama

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How to Cite

Nicholas, M. J., Ravindra Jayaratne, Takayuki Suzuki, & Shibayama, T. (2020). BUILDING FOUNDATION INSTABILITY INDUCED BY TSUNAMI SCOUR . Coastal Engineering Proceedings, (36v), currents.29. https://doi.org/10.9753/icce.v36v.currents.29

Abstract

Understanding the role of tsunami-induced scour in building foundation instability can allow for the proper design of buildings located in areas prone to tsunami events. The process of tsunami scour around building foundations reduces the bearing capacity of the soil to support loading, lateral resistance and loss of soil- foundation friction (i.e. piles). Scour can cause loss of material around a foundation, due to increased pore pressure within the soil and removal of the soil during the tsunami, resulting in reduced bearing capacity of the soil (Macabuag et al., 2018). During the 2004 Indian Ocean Tsunami and the 2011 Great East Japan Earthquake and Tsunami, three similar failure modes of building foundations were experienced, namely overturning, sliding and bearing (scour) failure (Macabuag et al., 2018). According to Wright (2015), shallow foundations such as strip, slab or pad are vulnerable to erosion of surrounding soil causing scour during a tsunami. The present paper discusses the application of the scour depth predictive model of Nicholas et al. (2016) and the development of a Relative Risk Index for future design of building foundations accounting for tsunamis.

Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/u6QSmUe8YqA

https://doi.org/10.9753/icce.v36v.currents.29

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References

Fraser, Raby, Pomonis, Goda, Chian, Macabuag, Offord, Saito and Sammonds (2013): Tsunami damage to coastal defences and buildings in the March 11th 2011 Mw9.0 Great East Japan earthquake and tsunami, Bulletin of Earthquake Eng., 11, pp. 205-239.

He, Lai, Wang, Hong and Zhu (2019): Scour effects on the lateral behavior of a large-diameter monopile in soft clay: Role of Stress History. doi:10.3390/jmse7060170.

Macabuag, Raby, Pomonis, Nistor, Wilkinson and Rossetto (2018): Tsunami design procedures for engineered buildings: a critical review, Proc. of the ICE, 171, pp.168-178.

Nicholas, Jayaratne, Suzuki, and Shibayama (2016): A predictive model for scour depth of coastal building failures due to tsunamis, Proc. of the 35th ICCE, 1, pp. 35- 43.

Wright (2015) Tsunami: Hazard Identification and Structural Vulnerability. Zurich: Zurich Insurance Group Ltd.

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.

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BUILDING FOUNDATION INSTABILITY INDUCED BY TSUNAMI SCOUR

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