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- W9364035 abstract "This study used FLAC Ver. 5.0 (Itasca 2005) to analyze the dynamic response of Li-yu-tan dam subjected to the 1999 Chi-Chi earthquake (ML = 7.3) in central Taiwan. The dam is a roller compacted earthdam which is 96 m high and 235 m long. It is an off-channel reservoir. The construction stage of the dam was numerically simulated by 20 layers of the dam materials added sequentially up to the top of the dam. Seepage analysis was performed using a 60-meter water level, which was the water level while the earthquake struck. After the seepage analysis, the initial stress state of the dam (before applying the earthquake acceleration) was obtained by computation of static equilibrium. The horizontal and vertical peak ground accelerations monitored at the base of the dam site are 0.149 g and 0.108 g, respectively. Because the vertical shaking of Chi-Chi earthquake is notable, both the horizontal and vertical monitored acceleration time histories were input to the base of the dam for 45 seconds in the dynamic analyses. The accelerations were filtered under 5 Hz before input. The FLAC built-in “Sigmoidal 4” equivalent-linear hysteretic model and MohrCoulomb soil model were simultaneously adopted with Rayleigh damping assignment. The numerical results of acceleration time history and Fourier spectra were compared with monitored data at the top of the dam. Permanent displacements at the top, upstream and downstream shells were also evaluated. The comparisons are satisfied with reasonable ranges of differences. Analyses of full water level (90 m) and low water level (30 m) were performed to predict the dynamic responses of the dam at these water levels. Comparisons were made to observe the differences in dynamic responses among the three different water levels." @default.
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- W9364035 date "2006-01-01" @default.
- W9364035 modified "2023-09-27" @default.
- W9364035 title "Dynamic response of Li-yu-tan earthdam subjected to the 1999 Chi-Chi earthquake in Taiwan" @default.
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