Study on design method of washed-away prevention system to tsunami

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760370
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Public Works Research Institute
• Principal Investigator: NAKAO Hisashi 独立行政法人土木研究所, その他部局等, 研究員 (50514171)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 津波 / 橋梁 / 流出防止システム / サイドプレート / 差分格子ボルツマン法

Outline of Final Research Achievements

This study discusses the washed-away prevention system of the superstructure through a series of flume test and analysis.
In the flume tests, 1/150-scaled models of the superstructure with four-girders section were employed with/without the vertical, 45 degree and 60 degree side plate. Test results showed that the 45 degree side plate effectively reduced the tsunami-induced horizontal and vertical forces and rotate clockwise moment.
In this study, Finite-Difference Lattice Boltzmann Method was employed for the numerical analysis. The results showed that the analysis of the two-phase flow with water and air, the tendency of the hydrodynamic pressure distribution and flow regime at the result of the numerical analysis were corresponded with the flume test.

Free Research Field

構造工学，耐震工学，流体工学