The Tsunami Hazard in Coastal Zones of Ibaraki Prefecture based on an Numerical Simulation of the Tsunami due to The 2011 off the Pacific coast of Tohoku Earthquake

2012 ◽  
Vol 68 (2) ◽  
pp. I_296-I_300
Author(s):  
Hisamichi NOBUOKA ◽  
Kenichi UZAKI ◽  
Hiroki ITHO ◽  
Takumu TSUBOI
Keyword(s):  
Numerical Simulation ◽  
Pacific Coast ◽  
Tohoku Earthquake ◽  
Tsunami Hazard ◽  
Coastal Zones ◽  
The Pacific ◽  
Ibaraki Prefecture

scholarly journals Analysis of coastal structure damaged by the 2011 Off the Pacific Coast of Tohoku Earthquake - Field investigation and numerical simulation -

2016 ◽  
Vol 2 (73) ◽  
pp. 2498-2503
Author(s):  
Tsuneo Ohsumi ◽  
Hemanta Hazarika ◽  
Tadashi Hara ◽  
Kentaro Kuribayashi ◽  
Shuichi Kuroda ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Pacific Coast ◽  
Tohoku Earthquake ◽  
Field Investigation ◽  
Coastal Structure ◽  
The Pacific

Numerical Analysis of Liquefaction in a River Levee on Soft Cohesive Ground

2012 ◽  
Vol 7 (6) ◽  
pp. 711-717 ◽  
Author(s):  
Ryosuke Uzuoka ◽  
◽  
Keita Semba
Keyword(s):  
Numerical Simulation ◽  
Static Analysis ◽  
Pacific Coast ◽  
Tohoku Earthquake ◽  
Moisture Distribution ◽  
Coupled Analysis ◽  
Initial State ◽  
State Of Stress ◽  
The Pacific ◽  
Moisture Conditions

During the 2011 off the Pacific coast of Tohoku earthquake, liquefaction at the bottom of embankments extensively damaged river levees in the Tohoku and Kanto areas. This study presents preliminary numerical simulation of liquefaction in a river levee on soft cohesive ground along the Eai River during the earthquake. Static analysis reproduced the initial state of stress and moisture in such an embankment before the earthquake. Static analysis showed a decrease in mean effective stress and an increase in water content at the bottom of the embankment due to the settlement of soft cohesive ground. The effect of initial stress and moisture conditions on the seismic responses of the river levee are discussed through dynamic threephase coupled analysis with an initially deformed configuration and moisture distribution. Numerical results showed that stress relaxation in the embankment caused an increase in settlement at the crest of embankment.

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