한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2005년도 춘계 학술발표회 논문집
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- Pages.1118-1125
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- 2005
진동대시험을 이용한 콘크리트 표면 차수벽형 석괴댐의 내진성능 평가
Evaluation of Resistance of Concrete-Face Rockfill Dam to Seismic Loading Using Shaking Table Test
- Ha, Ik-Soo (Korea Water Resources Corporation) ;
- Kim, Yong-Seong (Korea Water Resources Corporation) ;
- Seo, Min-Woo (Korea Water Resources Corporation) ;
- Park, Dong-Soon (Korea Water Resources Corporation)
- 발행 : 2005.03.25
초록
In this study, seismic safety of CFRD(Concrete-Face Rockfill Dam) type "D" dam in operation is evaluated from the results of 1-g shaking table test using similitude laws. Model dam is made by similitude law considering the grain size of prototype dam component. After the model dam is impounded to the normal water level(N.W.L), it is excited by artificial earthquake wave corresponding to standard design respond spectrum of the "D" dam site. Displacement response behavior of the dam is examined through the measurement of vertical and horizontal displacement of dam crest. Also, amplification characteristics of acceleration with dam height is examined through the measurement of acceleration with dam height. Finally, the purpose of this study is to evaluate seismic safety of "D" dam in operation. From the results of acceleration measurement, it was found that acceleration of dam crest was amplified about 1.52 times compared to the acceleration of dam bottom and amplification phenomenon is outstanding at three quarters of dam height from the bottom of dam. From the analysis of displacement behavior, it was estimated that vertical displacement of prototype dam is 6.8cm (0.1% of dam height) and horizontal displacement 12.3cm(0.2% of dam height). These percentages is much lower than 1% of dam height(general stability criteria). Therefore, it was concluded that seismic stability of "D" dam against an estimated earthquake is guaranteed.