| Summary: | 碩士 === 國立臺北科技大學 === 土木與防災技術研究所 === 89 === The Ji-Ji earthquake that took place on September 21, 1999 was the most damaging natural disaster that ever happened to Taiwan in the 20th century. It caused 2,405 deaths and 10,718 injuries. In addition, vital lifelines such as highway bridges, telecommunication links, water mains, and natural gas pipelines were severely damaged. Although secondary disasters such as fires and floods were not seen after the quake, the lack of tap water made the daily life difficult and inconvenient. This demonstrated the vulnerability of water supply systems before the earthquake.
In order to study the damage ratios of water pipelines caused by the Ji-Ji earthquake, this research analyzed the water pipeline performance of Wufeng Shiang. In addition to digitizing the distribution of water pipelines, collecting the actual damage data, and establishing a complete GIS database, this study also derived the regression relations between the water pipeline damages and the earthquake parameters. The results were compared with those obtained by Toprak in 1998 (based on the 1994 Northridge, the 1971 San Fernando, the 1987 Whittier Narrows, and the 1989 Loma Prieta earthquakes) and those by O’Rourke and Ayala in 1993 (based on two Mexican and one US earthquake). It was found that the results were quite different, which illustrated the importance of conducting local analysis in Taiwan. Based on these results, future work could be conducted to improve the seismic performance of water supply systems in Taiwan.
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