Chapter
Dec 27, 2013
Limits on Coastal Scour Depths due to Tsunami
Authors: Susan P. Tonkin [email protected], Mathew Francis [email protected], and Jeremy D. Bricker, Ph.D. [email protected]Author Affiliations
Publication: International Efforts in Lifeline Earthquake Engineering
Abstract
Tsunami scour has received increasing attention over the past decade, given its role as a critical failure mode for building damage and, in particular, the wide scale damage to infrastructure resulting from the 2004 Sumatra Andaman Tsunami and the 2011 Tohoku Tsunami. This paper uses observed scour from these events to distinguish four primary scour mechanisms: local scour (often associated with pore pressure softening), overtopping scour, channelized scour (in which flow is concentrated in a channel), and general scour or wide area erosion. The first two of these are commonly observed to undercut buildings and other structures. Simple models are presented for these two scour mechanisms correlated to field measurements and observations, providing upper limits on the observed scour depth values. Correlation of scour behavior by soil type, common in theoretical models, is not supported by the present data set, so a general condition is recommended for current practice.
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© 2014 American Society of Civil Engineers.
History
Published online: Dec 27, 2013
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ASCE Technical Topics:
- Analysis (by type)
- Buildings
- Channels (waterway)
- Disaster risk management
- Disasters and hazards
- Engineering fundamentals
- Failure analysis
- Failure modes
- Forensic engineering
- Geomechanics
- Geotechnical engineering
- Hydraulic engineering
- Hydraulic structures
- Hydraulics
- Infrastructure
- Natural disasters
- Scour
- Soil mechanics
- Soil properties
- Structural engineering
- Structures (by type)
- Tsunamis
- Water and water resources
- Waterways
Authors
Affiliations
P.E.
Moffatt & Nichol, 600 University, Ste. 610, Seattle, WA 98101, USA. E-mail: [email protected]
P.E.
URS, 12420 Milestone Center, Germantown, MD 20876, USA. E-mail: [email protected]
P.E.
Int'l Research Institute of Disaster Science, Tohoku University, 6-6-40-102 Aoba, Sendai 980-8579 Japan. E-mail: [email protected]
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