Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Liquefaction Analysis of River Dike with Discrete Element Method
Tokyo has a number of river embankments in below-sea level areas called "Tokyo lowlands." Because the deposits in Tokyo lowlands generally exhibit a thick soft soil layer, it is very important to study the liquefaction behavior for the mitigation of earthquake disaster. It is well known that the major cause of Yodo-gawa river dike damage by the 1995 Hyogoken-Numbu earthquake in Osaka, Japan, was the liquefaction of the ground where the loose sand layer existed. For these reasons, an earthquake-proof project of embankment is carried out by Tokyo Metropolitan Government presently. Figure 1 shows the severely damaged cross section located near the Yodo-gawa river mouth within about 40km from the epicenter. The concrete parapet wall at the top of embankment slipped into the riverbed and the maximum vertical permanent displacement was about 3m. Recently, the rapid increase of computer abilities has drastically extended availability of Discrete Element Method (DEM). In the field of geotechnical earthquake engineering, the liquefaction is one of the most important, complex, and necessary topics. In this study, the liquefaction analysis method by using DEM (Code name: PFC2D) in which the excess pore water pressure is taken into account to estimate the large permanent displacement due to liquefaction at the microscope level, is applied to the Yodo-gawa river dike damaged by the 1995 Hyogoken-Numbu earthquake.
Liquefaction Analysis of River Dike with Discrete Element Method
Tokyo has a number of river embankments in below-sea level areas called "Tokyo lowlands." Because the deposits in Tokyo lowlands generally exhibit a thick soft soil layer, it is very important to study the liquefaction behavior for the mitigation of earthquake disaster. It is well known that the major cause of Yodo-gawa river dike damage by the 1995 Hyogoken-Numbu earthquake in Osaka, Japan, was the liquefaction of the ground where the loose sand layer existed. For these reasons, an earthquake-proof project of embankment is carried out by Tokyo Metropolitan Government presently. Figure 1 shows the severely damaged cross section located near the Yodo-gawa river mouth within about 40km from the epicenter. The concrete parapet wall at the top of embankment slipped into the riverbed and the maximum vertical permanent displacement was about 3m. Recently, the rapid increase of computer abilities has drastically extended availability of Discrete Element Method (DEM). In the field of geotechnical earthquake engineering, the liquefaction is one of the most important, complex, and necessary topics. In this study, the liquefaction analysis method by using DEM (Code name: PFC2D) in which the excess pore water pressure is taken into account to estimate the large permanent displacement due to liquefaction at the microscope level, is applied to the Yodo-gawa river dike damaged by the 1995 Hyogoken-Numbu earthquake.
Liquefaction Analysis of River Dike with Discrete Element Method
Mori, Hiroshi (Autor:in) / Ogawa, Yoshimi (Autor:in) / Cao, Guoqiang (Autor:in)
Third International Conference on Discrete Element Methods ; 2002 ; Santa Fe, New Mexico, United States
Discrete Element Methods ; 172-177
27.08.2002
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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