THREE-DIMENSIONAL TSUNAMI PROPAGATION SIMULATION OF NANKAI TROUGH GREAT EARTHQUAKE TSUNAMI

2020 ◽  
Vol 76 (2) ◽  
pp. I_259-I_264
Author(s):  
Yusuke OISHI ◽  
Takamasa SHINDE ◽  
Takashi YAMAZAKI ◽  
Fumiyasu MAKINOSHIMA ◽  
Toshitaka BABA ◽  
...  
Keyword(s):  
Nankai Trough ◽  
Three Dimensional ◽  
Great Earthquake ◽  
Tsunami Propagation

Composite Lining Aseismic Design for Fault-Crossing Tunnel Structures

2014 ◽  
Vol 971-973 ◽  
pp. 30-34
Author(s):  
Chun Lei Xin ◽  
Bo Gao
Keyword(s):  
Active Faults ◽  
Three Dimensional ◽  
Bending Moment ◽  
Simulation Method ◽  
Internal Force ◽  
Great Earthquake ◽  
Underground Structures ◽  
Lining Structure ◽  
Internal Forces ◽  
Composite Lining

Although underground structures have stronger aseismic performance than ground structures, seismic disasters of mountain tunnels were fairly conspicuous in Wenchuan Great Earthquake. On the basis of seismic disaster analysis, a composite lining designfor tunnel structures across active fault was put forward. Three-dimensional numerical simulation method was used to analyze aseismic and damping effect of this structure. The results show that: (1)After setting aseismic and damping structure, the maximum internal forces value in lining the pattern of internal forces will not change. (2)Aseismic and damping structure setting can directly reduce the bending moment value and increase the axial force and stress force value in lining structure. (3) Relative to aseismic and damping structure, grouting region around damping layer can ameliorate internal force condition in lining structure and improve the effect of aseismic and damping structure. The above research results contribute to provide reference for seismic fortification of tunnel structures across active faults.

Three-dimensional paleomorphologic reconstruction and turbidite distribution prediction revealing a Pleistocene confined basin system in the northeast Nankai Trough area

AAPG Bulletin ◽  
2013 ◽  
Vol 97 (5) ◽  
pp. 781-798 ◽  
Author(s):  
Kosuke Egawa ◽  
Toshiko Furukawa ◽  
Tatsuo Saeki ◽  
Kiyofumi Suzuki ◽  
Hideo Narita
Keyword(s):  
Nankai Trough ◽  
Three Dimensional ◽  
Basin System

scholarly journals High Resolution Numerical Model for Salinity Transport in Rivers During a Tsunami Attack

2018 ◽  
Vol 13 (4) ◽  
pp. 767-779
Author(s):  
Hiroshi Nagashima ◽  
Nozomu Yoneyama ◽  
◽  
Keyword(s):  
Spatial Distribution ◽  
Temporal Change ◽  
Saline Water ◽  
Three Dimensional ◽  
Specific Area ◽  
Two Dimensional ◽  
Tsunami Propagation ◽  
Salinity Transport ◽  
Propagation Analysis ◽  
Potential Damage

In the event of a tsunami, saltwater flows into rivers and water purification plants must stop taking water from rivers to prevent entry of saline water into the plant owing to potential damage to machinery and contamination of the system. This leads to interruption of water supply during disaster. In this study, a salinity transport simulation model that can carry out a three-dimensional salinity behavior analysis in a specific area and a horizontal two-dimensional tsunami propagation analysis simultaneously was developed to predict saltwater behavior in rivers during a tsunami. These models are structured so that the influence of the boundary of the 3D domain can be excluded without significantly increasing the calculation load. The model was used to simulate saltwater behavior in the Yodo River in Japan during a tsunami. The spatial distribution and temporal change of saltwater under various river flows were quantitatively predicted, and the effectiveness of possible countermeasures in diminishing the duration of water-intake shutdown and the presence of brackish water in upstream areas was assessed.

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