請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44629
標題: | 殘骸與沖刷深度對樁基礎橋梁之影響 EFFECTS OF DEBRIS AND SCOUR DEPTH ON PILE FOUNDATION BRIDGE |
作者: | Huong-Duong Nguyen 阮向陽 |
指導教授: | 張國鎮(Chang Kuo-Chun) |
關鍵字: | 莫拉克颱風,雙園大橋,基樁破壞,沖刷,岩屑,水載重,側推, Morakot typhoon,Shuang Yuan bridge,pile failure,scoured,debris,water load,pushover, |
出版年 : | 2010 |
學位: | 碩士 |
摘要: | Typhoon Morakot (or typhoon No 8) of August 8, 2009, destroyed a total of 90 bridges around Taiwan.
Water levels have traditionally been the sole criteria for bridge closure amid flooding in Taiwan., Under current guidelines, many bridges were not closed off before they collapsed this time. Take, for instance, the 2,083-meter Shuang Yuan Bridge, which was actually two separate bridges, one for each direction long of traffic. This bridge is expected in good conditions when the northbound bridge's No. 2-15 piers and the southbound bridge's No. 2-16 piers were washed away by raging currents. In current time, the velocity of water flow, the geological condition of each bridge needs to be considered. In this study, the capacity of Shuang Yuan Bridge was investigated under different levels of scoured depth. The pile axial capacity based on soil parameters, the bending, shear capacity and buckling instability of piles was analyzed. Scoured group pile foundations were modeled by Sap 2000. Debris load was also computed based on various water velocities, debris geometry and hydraulic parameters assumption. The pushover analysis is carried out with water and debris load to find the capacity curve of the bridge with different scoured depth, then the maximum applied floodwater force acting on a pier, and the performance water velocity is determined. The possible causes of Shuang Yuan Bridge failure are also pointed out. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44629 |
全文授權: | 有償授權 |
顯示於系所單位: | 土木工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-99-1.pdf 目前未授權公開取用 | 2.26 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。