The Damaged bridges Behavior,RecoveryandStrengthen Methods Caused by Chi-Chi-Earthquake

• Main Authors: Yang Tzong-Yueh, 楊宗岳
• Other Authors: Chu Ming-Sing
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/47668955758321192483

碩士 === 國立中興大學 === 土木工程學系 === 89 === In the early morning, the strongest earthquake motion of the Taiwan historical record in September 21, 1999 Chi Chi earthquake (ML=7.3) was occurred. The epicenter was located at 23.86°N,120.75°E and its distance is about 4.51 km NE far from the Chi Chi city. The 105 km length of earth surface ruptures was produced. There were extensive surface slipped with vertical displacement about 11 m and lateral strike slip about 10 m along the Chelungpu Fault. The road and rail bridges, tunnels were damaged badly in the disaster area. The earthquake broke all of the transportation nets down. There are three main categories in this study. Firstly, we want to discuss the geologic structure of Taiwan and the reason why the earthquake occurred frequently in Taiwan seismic history. Furthermore, we also discuss the cause and phenomenon of the Chi Chi earthquake. Secondary, all elements of the damaged bridges behavior is concluded after Chi Chi earthquake in order to make the optimum of the bridges design about preventing the seismic hazards in the future. Finally, to the bridge structures lightly injured after the earthquake shake, we make suggestions about the damaged bridge for recovery and strengthen methods, in order to restore their transportation functions efficiently, economically as soon as possible. The Chi Chi earthquake leaves a suffering memory of Taiwan people that can’t be eliminated. To sum up, we hope that we can realize the complex pattern of surface faulting adequately after Chi Chi earthquake. In order to reducing the affect to the bridges after any earthquake motion in the future.