| Volumes and Issues Contents of Issue 6 |
www.nat-hazards-earth-syst-sci.net/10/1269/2010/
doi:10.5194/nhess-10-1269-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Numerical earthquake response analysis of the Liyutan earth dam in Taiwan
1Department of Soil and Water Conservation, National Chung Hsing University, Taichung 402, Taiwan
2Department of Construction Engineering, Chaoyang University of Technology, Taichung, Taiwan
3Kingfeng County Government, Taitung, Taiwan
Abstract. The dynamic response of the Liyutan earth dam to the 1999 Chi-Chi earthquake (ML=7.3) in Taiwan was numerically analyzed. First, the staged construction of the dam was simulated. Then, seepage analysis, considering a 60-m water level, was performed. After seepage analysis, the initial static stress (prior to dynamic loading) was established in the dam. Both the horizontal and vertical acceleration time histories recorded at the base of the dam were used in the numerical simulations. The dynamic responses of the dam were analyzed for 50 s in the time domain. The simulated results were in agreement with the monitored data. The transfer function analysis and Hilbert-Huang Transform (HHT) were used to compare the results and to perceive the response characteristics of the dam. In particular, the time-frequency-energy plots of the HHT can reveal the timing and time frame of the dominant frequencies of the dynamic response. The influences of the initial shear modulus and uni-axial earthquake loading were also investigated.
Full Article (PDF, 4073 KB)
Citation: Feng, Z., Tsai, P. H., and Li, J. N.: Numerical earthquake response analysis of the Liyutan earth dam in Taiwan, Nat. Hazards Earth Syst. Sci., 10, 1269-1280, doi:10.5194/nhess-10-1269-2010, 2010. Bibtex EndNote Reference Manager XML
