scholarly journals REFLECTION AND RUN-UP OF TSUNAMI ON QUAY WALL AND BEHAVIOR OF DRIFTED VESSELS DUE TO TSUNAMI

2011 ◽  
Vol 1 (32) ◽  
pp. 11
Author(s):  
Norimi Mizutani ◽  
Tomoaki Nakamura
Keyword(s):  
Numerical Analysis ◽  
Water Depth ◽  
Great Influence ◽  
Quay Wall ◽  
Run Up ◽  
Tsunami Run Up ◽  
And Behavior

Behaviors of a drifted vessel due to a tsunami and the reflection of the tsunami from a quay wall are investigated in this paper based on experiments and numerical analysis. It is found that the height of the quay wall has a great influence on the reflection, and hence the tsunami run-up. It is also revealed that the vessel can be run up on the apron when the water depth at the quay wall is larger than the draft of the vessel.

NUMERICAL ANALYSIS ON TSUNAMI RUN-UP AND TSUNAMI FLOOD TO A COASTAL CITY

2003 ◽  
Author(s):  
Xiaodong Liu ◽  
Shigeki Sakai ◽  
Tsutomu Mikami ◽  
Shunji Iwama ◽  
Fumihiko Imamura ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Coastal City ◽  
Run Up ◽  
Tsunami Run Up

scholarly journals Numerical analysis of static behavior of caisson-type quay wall deepened by grouting rubble-mound

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Anh-Dan Nguyen ◽  
Young-Sang Kim ◽  
Gyeong-O Kang ◽  
Hui-Jin Kim
Keyword(s):  
Numerical Analysis ◽  
Water Depth ◽  
The Finite Element Method ◽  
Static Behavior ◽  
The Past ◽  
Common Structure ◽  
Quay Wall ◽  
Different Shapes ◽  
Rubble Mound ◽  
Maximum Contact

AbstractCaisson type gravity quay wall is a common structure used in the coastal regions. However, many of the existing quay walls constructed in the past are becoming obsolete. Therefore, the main goal of this study is to enhance the performance of these quay walls by increasing the front water depth. To deepen the water depth, a special grout type is ejected to solidify the rubble mound under the caisson toe, then excavating a part of the rubble placed in front of the caisson to the designed level. Various cases with different shapes and dimensions are proposed to optimize the grouted area. Based on the examination of stability and construction feasibility, the reasonable geometry and area of grouted rubble can be selected. In addition, the numerical analysis is performed by the Finite Element Method (FEM) program (PLAXIS 2D) to expect the behavior of the quay wall and grouted rubble. The results demonstrate that after upgrading, the maximum contact stress between caisson and rubble mound increases sharply, but the stress at the bottom of grouted rubble does not change in comparison prior to innovation. The analysis also indicates that when the Hardening Soil (HS) model is applied, the displacement of the quay wall is higher than that of the Mohr–Coulomb soil (MC) model.

scholarly journals Physical and Numerical Modelling of Tsunami Run-up on Seawall at Sloping Beach

2019 ◽  
Vol 5 (2) ◽  
pp. 139
Author(s):  
Ma'ruf Hadi Sutanto
Keyword(s):  
Numerical Model ◽  
Water Depth ◽  
Tsunami Wave ◽  
Peak Height ◽  
Initial Water ◽  
Tsunami Mitigation ◽  
Run Up ◽  
Tsunami Run Up ◽  
Sloping Beach ◽  
Reduction Percentage

Tsunami run-up on land has a large destructive power. Further studies are deemed necessary to understand the process and characteristics of tsunami run-up in coastal areas. Seawall structures can reduce the run-up of a tsunami depending on the height of the seawall crest. Physical modeling shows that seawall may significantly reduce run-up (𝑅) and inundation (𝑋𝑖). The highest reduction up to 55% where the seawall peak height is 7 cm and the water depth is 15 cm. With the same scenario in numerical modeling, the percentage reduction is 67.53%. The highest inundation (Xi) in the scenario without seawall structure is 6.081 m when the initial water depth (d0) equals to 30 cm. The result of the numerical model for the same scenario is 6.970 m. Seawall as tsunami mitigation structure is only effective when the tsunami wave is relatively low compared to the seawall height (H/ sw). Reduction percentage > 25%, with conditions that H/ sw is < 0.856 (physical model) and < 0.802 (numerical model).

scholarly journals NUMERICAL ANALYSIS FOR THE BEHAVIOR OF THE DRIFTAGE WITH TSUNAMI RUN-UP USING FAVOR METHOD

2008 ◽  
Vol 52 ◽  
pp. 1399-1404 ◽  
Author(s):  
Nozomu YONEYAMA ◽  
Hiroshi NAGASHIMA ◽  
Keiichi TODA
Keyword(s):  
Numerical Analysis ◽  
Run Up ◽  
Tsunami Run Up

scholarly journals Shoreline Changes along Northern Ibaraki Coast after the Great East Japan Earthquake of 2011

2021 ◽  
Vol 13 (7) ◽  
pp. 1399
Author(s):  
Quang Nguyen Hao ◽  
Satoshi Takewaka
Keyword(s):  
Near Infrared ◽  
Thermal Emission ◽  
Sandy Beaches ◽  
Great East Japan Earthquake ◽  
Shoreline Changes ◽  
Run Up ◽  
Tsunami Run Up ◽  
Sentinel 2 ◽  
Infrared Radiometer

In this study, we analyze the influence of the Great East Japan Earthquake, which occurred on 11 March 2011, on the shoreline of the northern Ibaraki Coast. After the earthquake, the area experienced subsidence of approximately 0.4 m. Shoreline changes at eight sandy beaches along the coast are estimated using various satellite images, including the ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer), ALOS AVNIR-2 (Advanced Land Observing Satellite, Advanced Visible and Near-infrared Radiometer type 2), and Sentinel-2 (a multispectral sensor). Before the earthquake (for the period March 2001–January 2011), even though fluctuations in the shoreline position were observed, shorelines were quite stable, with the averaged change rates in the range of ±1.5 m/year. The shoreline suddenly retreated due to the earthquake by 20–40 m. Generally, the amount of retreat shows a strong correlation with the amount of land subsidence caused by the earthquake, and a moderate correlation with tsunami run-up height. The ground started to uplift gradually after the sudden subsidence, and shoreline positions advanced accordingly. The recovery speed of the beaches varied from +2.6 m/year to +6.6 m/year, depending on the beach conditions.

Analysis on Kinematic Characteristics of Precision Balls Grinding

2012 ◽  
Vol 497 ◽  
pp. 20-24
Author(s):  
Yong Dai ◽  
Dong Hui Ding ◽  
Xu Xiao ◽  
Xue Shi Liu ◽  
Rui Jiang He ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Great Influence ◽  
Processing Parameters ◽  
Important Influence ◽  
Normal Movement ◽  
Motion State ◽  
Kinematic Characteristics ◽  
The Difference

In the process of grinding precision balls, the motion state of balls has an important influence on the efficiency and quality. However, the normal movement of balls will be damaged because of slipping, so it must be avoided. Besides, to process different materials of balls, it should use different processing parameters. This paper studies a numerical analysis on the kinematic characteristics of the motion of balls, analyzes processing parameters which impact the motion of balls during grinding and the difference of the motion state of bearing balls and resin balls. Study shows grinding pressure and plate speed have a great influence to the motion of balls during grinding.

scholarly journals NEAR-FIELD TSUNAMI FORECASTING BASED ON A TSUNAMI RUN-UP RESPONSE FUNCTION

2020 ◽  
pp. 5
Author(s):  
Juh-Whan Lee ◽  
Jennifer L. Irish ◽  
Robert Weiss
Keyword(s):  
Real Time ◽  
Response Function ◽  
Near Field ◽  
Coastal Communities ◽  
Tsunami Forecast ◽  
Earthquake Fault ◽  
Tsunami Forecasting ◽  
Fault Parameters ◽  
Run Up ◽  
Tsunami Run Up

Since near-field-generated tsunamis can arrive within a few minutes to coastal communities and cause immense damage to life and property, tsunami forecasting systems should provide not only accurate but also rapid tsunami run-up estimates. For this reason, most of the tsunami forecasting systems rely on pre-computed databases, which can forecast tsunamis rapidly by selecting the most closely matched scenario from the databases. However, earthquakes not included in the database can occur, and the resulting error in the tsunami forecast may be large for these earthquakes. In this study, we present a new method that can forecast near-field tsunami run-up estimates for any combination of earthquake fault parameters on a real topography in near real-time, hereafter called the Tsunami Run-up Response Function (TRRF).Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/tw1D29dDxmY

scholarly journals Source Fault Model of the 2011 off the Pacific Coast of Tohoku Earthquake, Estimated from the Detailed Distribution of Tsunami Run-up Heights

2015 ◽  
Vol 124 (2) ◽  
pp. 177-192 ◽  
Author(s):  
Nobuhisa MATSUTA ◽  
Yasuhiro SUZUKI ◽  
Nobuhiko SUGITO ◽  
Takashi NAKATA ◽  
Mitsuhisa WATANABE
Keyword(s):  
Pacific Coast ◽  
Tohoku Earthquake ◽  
Fault Model ◽  
The Pacific ◽  
Run Up ◽  
Tsunami Run Up
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