https://scholars.lib.ntu.edu.tw/handle/123456789/167620
標題: | Analysis of landsliding by earthquake shaking using a block-on-slope thermo-mechanical model: Example of Jiufengershan landslide, central Taiwan | 作者: | Chang, Kuo-Jen Taboada, Alfredo Lin, Ming-Lang Chen, Rou-Fei |
關鍵字: | Thermo-mechanical model;Newmark’s method;Jiufengershan rock-and-soil avalanche;Earthquake-triggered landslide;Chi-Chi earthquake | 公開日期: | 2005 | 出版社: | Taipei:National Taiwan University Dept Civil Engn | 起(迄)頁: | - | 來源出版物: | Engineering Geology 80, 151–163 | 摘要: | The Jiufengershan rock-and-soil avalanche is one of the largest landslides triggered by the Chi-Chi Taiwan earthquake (September 21, 1999). In order to study landslide triggering and propagation by seismic shaking, we propose a method that combines features of the classic Newmark approach with mechanical relations involving Mohr-Coulomb failure criteria, porewater pressure and shear heating during the sliding process. The effective shear strength is affected by shear heating and by pore-pressure variations during the sliding process. The shaking process was simulated using strong-motion accelerograms of the three nearest free-field stations, which surrounded the landslide. The initiation and propagation of earthquake-induced landslides are mainly controlled by the peak and residual shear strengths, respectively. The increase in temperature in the shear zone increases the pore-water pressure and weakens the shear strength. Rock avalanches are generated when mechanical parameters achieve critical threshold values, such that the residual shear strength is less than the tangential projection of body forces. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501254467 | 其他識別: | 246246/2006111501254467 | DOI: | 10.1016/j.enggeo.2005.04.004 |
顯示於: | 土木工程學系 |
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