scholarly journals WAVE REDUCTION EFFECT OF HYDROPLANE TSUNAMI BARRIER IN TERMS OF HYDRAULIC MODEL EXPERIMENTS

2015 ◽  
Vol 71 (2) ◽  
pp. I_1081-I_1086
Author(s):  
Ryoukei AZUMA ◽  
Tadao ITO ◽  
Hideaki HANDA ◽  
Tetsuya HIRAISHI ◽  
Takahiro SUGANO
Keyword(s):  
Hydraulic Model ◽  
Model Experiments ◽  
Reduction Effect ◽  
Wave Reduction

HYDRAULIC MODEL EXPERIMENTS TO UNDERSTAND INFLUENCE OF UPCOAST STRUCTURES ON MEASURES AGAINST CLOGGING OF THE MOTOFUJI CALVERT

2019 ◽  
Vol 75 (2) ◽  
pp. I_541-I_546
Author(s):  
Masaki IKEDA ◽  
Hiroshige MATSUMOTO ◽  
Fumiaki ITO ◽  
Satoshi HENMI ◽  
Go ASANO
Keyword(s):  
Hydraulic Model ◽  
Model Experiments

scholarly journals Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill

2020 ◽  
Vol 8 (11) ◽  
pp. 922
Author(s):  
Tomoaki Nakamura ◽  
Yuto Nakai ◽  
Yong-Hwan Cho ◽  
Norimi Mizutani
Keyword(s):  
Numerical Simulation ◽  
Soil Cover ◽  
Coastal Areas ◽  
Hydraulic Model ◽  
Numerical Analyses ◽  
Conical Part ◽  
Model Experiments ◽  
Cover Depth ◽  
Bridge Abutment

Tsunamis can seriously damage bridges in coastal areas. Studies of such damage have elucidated the action of tsunami-induced forces on girders. However, tsunami-induced erosion of bridge-abutment backfill has been largely neglected. This article investigates this little-studied topic using hydraulic model experiments and numerical analyses. The results show that a tsunami erodes the backfill close to the abutment; the scale of the erosion increases with the duration of the tsunami. By contrast, the backfill on the far side of the abutment remains relatively intact. This suggests that the presence of the abutment accelerates the erosion of the backfill in its vicinity. A numerical simulation shows that the tsunami erodes the oval conical part of the backfill on the landward side of the onshore wing. When the erosion reaches the lower end of the wing the backfill begins to flow out from underneath. Thus, an increase in the soil-cover depth of the onshore wing might help slow down the erosion.

scholarly journals Performance Evaluation of Hydroplane Tsunami Barrier by Means of Small Hydraulic Model Experiments

2014 ◽  
Vol 70 (2) ◽  
pp. I_951-I_955
Author(s):  
Ryoukei AZUMA ◽  
Tadao ITO ◽  
Hideaki Handa ◽  
Ryo Yamashiki ◽  
Tetsuya HIRAISHI ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Hydraulic Model ◽  
Model Experiments

scholarly journals Hydraulic Model Experiments on the Reduction of Wave Overtopping by the Integrated Shore Protection Facility Planned near Natural Rocky Beaches

2013 ◽  
Vol 69 (2) ◽  
pp. I_296-I_300
Author(s):  
Kenji UESHIMA ◽  
Masaharu MINAMI ◽  
Masahiko KOGA ◽  
Hideyuki SHIMAZOE ◽  
Yasuhiro NISHII ◽  
...  
Keyword(s):  
Hydraulic Model ◽  
Shore Protection ◽  
Wave Overtopping ◽  
Model Experiments

scholarly journals THERMAL DISCHARGES: PROTOTYPE vs. HYDRAULIC MODEL

1976 ◽  
Vol 1 (15) ◽  
pp. 173
Author(s):  
Gary C. Parker ◽  
C.S. Fang ◽  
Albert Y. Kuo
Keyword(s):  
Nuclear Power ◽  
Water Discharge ◽  
Cooling Water ◽  
Hydraulic Model ◽  
Physical Parameters ◽  
Thermal Discharge ◽  
James River ◽  
Model Experiments ◽  
Model Predictions ◽  
Physical Effects

Data on physical parameters in the James River around the condenser cooling water discharge of the Surry Nuclear Power Plant, taken prior to and during plant operation, were analyzed to determine the physical effects of the thermal discharge on the area and to compare the prototype distribution of excess temperature to predictions based on hydraulic model experiments. The results of this investigation indicated that the increase in water temperatures due to the thermal discharge did not represent a significant alteration of the physical environment outside the mixing zone. The thermal discharge experienced turbulent mixing and entrainment near the outfall and temperatures decreased rapidly in this region. Field data on temperature distributions around the discharge, when compared to predictions based on hydraulic model experiments, indicate that the model predictions were conservative.

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