Abstract
The 2011 Great East Japan Earthquake and Tsunami was one of the strongest earthquakes which generated a major tsunami in
 modern history. The tsunami disaster had an estimated cost of 16.9 trillion yen (US$ 217.3 billion) and affected the Coastal
 buildings, services, infrastructure and industrial sectors. Approximately 61% of damaged cost was from the building sector. A
 practical predictive scour depth model at seaward face was developed to highlight the scour failure of Coastal buildings in Miyagi,
 Fukushima and Iwate prefectures affected by the 2011 Great East Japan Earthquake and Tsunami. The predictive model for
 representative scour depth was developed in terms of various hydraulic, geometrical and soil properties affecting Coastal buildings.
 An analysis was undertaken to investigate the effectiveness of the authors’ predictive scour model against the existing models. The
 results of the authors’ proposed model suggested that the tsunami velocity played a significant role on tsunami-induced scour, other
 scour models such as Tonkin et al.’s model (2003) is reliant on the accuracy of sub models and hydrodynamic forces while the
 Colorado State University model as modified by Nadal et al. (2010) is reliant on the geometric parameter of the structure.
Highlights
Tsunami-induced scour effects on Coastal buildings is a complex phenomenon which has not been explored by many coastal researchers
Kazama and Noda (2012) carried out studies to identify the damages caused by the tsunami event and concluded that the most costly sector affected by the 2011 Tohoku tsunami was the building sector
A scour depth predictive model was developed using the Buckingham π theorem, which was used to derive the relationship between relative scour depth, shear velocity, model coefficients based on frictional properties of the soil-surface and geometrical properties of the building such as the seaward width of the building
Summary
Tsunami-induced scour effects on Coastal buildings is a complex phenomenon which has not been explored by many coastal researchers. The authors reviewed published literature and post-disaster field surveys in order to determine the effective parameters essential to predict the representative scour depth at the seaward corners of damaged Coastal buildings in Tohoku region. It is believed that this practical model will aid in the design of building foundations by predicting the scour depths accurately under tsunami waves. This paper discusses this phenomena and sheds light on the importance of tsunami-induced scour on building damage and highlights possible mitigation strategies that can be undertaken for future tsunami events. The scour data used to develop the authors’ predictive model was collected from various cities in the Tohoku region This included the three main affected prefectures; Iwate, Miyagi and Fukushima. Data used in developing the authors’ predictive scour model were taken from the buildings and locations in Figs. 3, 4, 5 and 6
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
