Abstract
n 2011, the huge tsunami caused by the great east Japan earthquake devastated many infrastructures in pacific coast of north eastern Japan. Particularly, collapse of bridges caused a traffic disorder and these collapse behaviors led to delay of recovery after the disaster. In this study, the bridge wash away accident is selected as a target issue, and it is represented by a numerical simulation. For this purpose, Smoothed Particle Hydrodynamics (SPH) Method, which is one of the pure mesh free methods, is utilized for the rigid body motion simulation. In this study, rigid body motion is introduced for the fluid-rigid interaction behavior during bridge wash away simulation. In the numerical analysis, the upper bridge structure is washed away by receiving an impact fluid force. The wash away simulation of two types of the bridge girder showed good agreement with the real accident on the great east Japan earthquake tsunami. © Owned by the authors, published by EDP Sciences, 2016 Language: en
Highlights
On March 11, 2011, the huge tsunami caused by the great east Japan earthquake devastated many infrastructures in pacific coast of north eastern Japan
The bridge wash out accident is selected as a target issue, and we try to represent these accidents by using a numerical analysis
One of the mesh free methods; Smoothed Particle Hydrodynamics (SPH) Method [1, 2] is utilized for Tsunami flow
Summary
On March 11, 2011, the huge tsunami caused by the great east Japan earthquake devastated many infrastructures in pacific coast of north eastern Japan. The bridge wash out accident is selected as a target issue, and we try to represent these accidents by using a numerical analysis. For this purpose, one of the mesh free methods; Smoothed Particle Hydrodynamics (SPH) Method [1, 2] is utilized for Tsunami flow. The main advantage of SPH and the other particle simulation is the absence of a computational grid or mesh since it is spatially discretized into Lagrangian moving particles This allows the possibility of modeling flows with a complex geometry or flows where large deformations or the appearance of a free surface occurs. A fluid-solid interaction algorithm including rigid body motion is developed in this study
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