Dynamic Numerical Analysis of Renyi-Tan Dam

• Main Authors: Wu H. H, 吳信和
• Other Authors: Gui M. W.
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/74021244000931129689

碩士 === 國立臺北科技大學 === 土木與防災技術研究所 === 91 === The devastating Ji-ji earthquake, measured 7.2 on the moment magnitude scale, struck Taiwan on 21 September 1999 and caused severe property losses and thousands of lives. Excessive ground deformation caused the Si Gang concrete dam to suffer severe crack and lost its ability to retain water. As such, it is important to evaluate earthquake-resistant of water dams in Taiwan so as to ensure their functionality and structural integrity before any incident occurs. For earthquake-resistant analysis of earth-fill dam, pseudo-static analysis has been adopted since the early day. Here, an earthquake coefficient that represents the strength of an earthquake is directly applied to the conventional slope stability analysis. The results given by this method are considered satisfactory and reasonable especially in the earth-fill dam design but this is of no use to the long-term performance of the dam. Many dynamic numerical tools that involve the calculation of stresses and strains have been developed in the last few years and they can be used to predict pore water pressures generation that control the dam stability during an earthquake. This research compiles the information from the VELACS dam modeling project; the computer program SWANDYNE is then used to simulate one of the VELACS experiment so as to evaluate and understand the performance of SWANDYNE. A case study, using the Renyi-Tan dam, is finally presented. Both the pseudo-static and dynamic numerical analyses are performed so as to evaluate and understand the earthquake-resistant performance of this dam. Numerical analysis is seen to be more superior to the pseudo-static method but the results are often difficult to interpret.