Development of evaluation technique of seismic resistance for earth fill dam using elastic wave velocity monitoring

Research Project

Project/Area Number	25871097
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Rural environmental engineering/Planning Geotechnical engineering
Research Institution	National Agriculture and Food Research Organization
Principal Investigator	UENO Kazuhiro 国立研究開発法人農業・食品産業技術総合研究機構, 農村工学研究部門施設工学研究領域, 研究員 (60560167)
Project Period (FY)	2013-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000) Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000) Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords	非排水繰返し載荷 / 弾性波速度 / 乾燥密度 / 細粒分 / 不規則荷重 / 累積損傷度理論 / 作用応力依存性 / 拘束圧依存性 / 載荷速度依存性
Outline of Final Research Achievements	Considering the behavior of earth fill dams observed during small and medium scale earth quakes is effective to evaluate the seismic resistance of earth fill dams during large scale earth quakes with a high degree of accuracy. This study aimed to clarify the detail characteristics of change in the elastic wave velocity during undrained cyclic loading. As a result, it was clarified that the reduction ratio of elastic wave velocity become larger with a decrease in density of specimen. Furthermore, prediction of change in the elastic wave velocity during undrained cyclic loading when specimens subjected to irregular loading was attempted by using the cumulative damage concept.