Identification of co-seismic ground motion due to fracturing and impact of the Tsaoling landslide, Taiwan

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題名:	Identification of co-seismic ground motion due to fracturing and impact of the Tsaoling landslide, Taiwan
作者:	董家鈞;Kuo, Chih-Yu;Chang, Kuo-Jen;Tsai, Pi-Wen;Wei, Shao-Kuan;Chen, Rou-Fei;Dong, Jia-Jyun;Yang, Che-Ming;Chan, Yu-Chang;Tai, Yih-Chin
貢獻者:	地球科學學院應用地質研究所
關鍵詞:	Chi-Chi earthquake;cluster analysis;Computer simulation;Decomposition;Earthquakes;Elastic waves;empirical mode decomposition;engineering;fluid mechanics;geophysics;Ground motion;Landslides;Mathematical models;Newmark analysis;prediction;Rigid-body dynamics;statistical clustering analysis;Taiwan;transient elastic wave
日期:	2015-09-08
上傳時間:	2026-04-23 14:59:22 (UTC+8)
出版者:	Elsevier;Elsevier B.V
摘要:	摘要： Earthquakes can generate seismic disturbances that propagate vast distances and trigger landslides that can achieve high-speeds. It remains difficult to identify the co-seismic ground motion of these landslides and their triggering earthquakes. In this paper, we report on the analysis of co-seismic ground motions generated by the initiating fracture and deposition impact of the Tsaoling landslide. The landslide, with a source volume of 125×106m3, was triggered by the 1999 Chi-Chi earthquake in Taiwan. The ground motion was recorded by a strong ground motion station, CHY080, near the scar area. The polarization of the seismic waves indicates that the peak acceleration was parallel to the dip direction. Modified ensemble empirical mode decomposition (EEMD), with additional clustering analysis, was applied to decompose the seismic signals. Two instances were found in the seismic records of a series of peculiar wave packets, with the first being associated with the landslide initiation and the second the landslide impact on the deposit valley. To confirm the first landslide breakage, the decomposed signals were compared with the predictions of the analytic elastic wave model and Newmark analysis. The landslide impact was verified with a computational fluid dynamic simulation. Comparison between the EEMD decomposed signals, elastic wave theory, Newmark rigid body analysis, and numerical simulation demonstrates the claimed landslide motion. •EEMD is used to extract coseismic landslide fracturing and impact signals.•The landslide fracturing produces a 2D polarized sharp intermittent motion.•The elastic model predicts correct time and magnitude scales of the fracturing.•The initiation time is in excellent agreement with the Newmark analysis.•The landslide impact signals are inspected using CFD simulation. 出版者： Elsevier B.V 出版日期： 2015-09-01 出處： Engineering geology, 2015-09, Vol.196, p.268-279 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2015 Elsevier B.V. 識別號： ISSN: 0013-7952 識別號： EISSN: 1872-6917 識別號： DOI: 10.1016/j.enggeo.2015.07.013
顯示於類別:	[應用地質研究所] 期刊論文

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