Analysis of landsliding by earthquake shaking using a block-on-slope thermo-mechanical model: Example of Jiufengershan landslide, central Taiwan

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, pore-water 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.

[1]  S. Kramer Geotechnical Earthquake Engineering , 1996 .

[2]  Seismic Site Effects for Shallow and Deep Alluvial Basins: In-Depth Motion and Focusing Effect , 2002, 0908.2712.

[3]  Cwb CWB Free-Field Strong-Motion Data from the 921 Chi-Chi Earthquake , 1999 .

[4]  J. N. Hutchinson,et al.  Ring shear tests on soil from the Vaiont landslide slip surface , 1999 .

[5]  Tzay-Chyn Shin,et al.  CWB Free-Field Strong-Motion Data from the 21 September Chi-Chi, Taiwan, Earthquake , 2004 .

[6]  P. Fishbane,et al.  Physics for scientists and engineers : with modern physics , 2005 .

[7]  Chi‐Yue Huang Oligocene and Miocene stratigraphy of the the Kuohsing area, central Taiwan , 1986 .

[8]  I. Vardoulakis Dynamic thermo-poro-mechanical analysis of catastrophic landslides , 2002 .

[9]  N. Newmark Effects of Earthquakes on Dams and Embankments , 1965 .

[10]  Randall W. Jibson,et al.  PREDICTING EARTHQUAKE-INDUCED LANDSLIDE DISPLACEMENTS USING NEWMARK'S SLIDING BLOCK ANALYSIS , 1993 .

[11]  S. Vahdani,et al.  Response of the Tarzana strong motion site during the 1994 Northridge earthquake , 2002 .

[12]  Raymond A. Serway,et al.  Printed test bank to accompany Physics for scientists and engineers with modern physics , 1982 .

[13]  C. Ho,et al.  臺灣地質概論 : 臺灣地質圖説明書 = An introduction to the geology of Taiwan : explanatory text of the geologic map of Taiwan , 1975 .

[14]  Patrick Dangla,et al.  Numerical analysis of seismic wave amplification in Nice (France) and comparisons with experiments , 2000, 0901.3817.

[15]  A. Lin,et al.  Frictional fusion due to coseismic landsliding during the 1999 Chi‐Chi (Taiwan) ML 7.3 Earthquake , 2001 .

[16]  J. Facciorusso,et al.  Influence of uncorrected accelerogram processing techniques on Newmark's rigid block displacement evaluation , 2003 .

[17]  J. Suppe Mechanics of mountain-building and metamorphism in Taiwan , 1981 .

[18]  Chi‐Yue Huang,et al.  Late Oligocene to early Miocene dinoflagellate cysts from the Kuohsing area, central Taiwan , 2002 .

[19]  Ioannis Vardoulakis,et al.  Steady shear and thermal run-away in clayey gouges , 2002 .

[20]  Randall W. Jibson,et al.  Influence of Surface-Normal Ground Acceleration on the Initiation of the Jih-Feng-Erh-Shan Landslide during the 1999 Chi-Chi, Taiwan, Earthquake , 2004 .

[21]  P. C. Pelekis,et al.  Effects of surface topography on seismic ground response in the Egion (Greece) 15 June 1995 earthquake , 1999 .

[22]  Mien-Ming Chen,et al.  A Preliminary Report on the Chiufenershan Landslide Triggered by the 921 Chichi Earthquake in Nantou, Central Taiwan , 2002 .

[23]  Shui-Beih Yu,et al.  Velocity field of GPS stations in the Taiwan area , 1997 .

[24]  Masahiro Chigira,et al.  Geological and geomorphological precursors of the Chiu-fen-erh-shan landslide triggered by the Chi-chi earthquake in central Taiwan , 2003 .

[25]  K. Shou,et al.  Analysis of the Chiufengershan landslide triggered by the 1999 Chi-Chi earthquake in Taiwan , 2003 .

[26]  D. Boore Effect of Baseline Corrections on Displacements and Response Spectra for Several Recordings of the 1999 Chi-Chi, Taiwan, Earthquake , 2004 .

[27]  D. Keefer,et al.  Dynamic analysis of a slope failure from the 6 August 1979 Coyote Lake, California, earthquake , 1983 .

[28]  Scott B. Miles,et al.  Rigorous landslide hazard zonation using Newmark's method and stochastic ground motion simulation , 1999 .

[29]  C. S. Ho A synthesis of the geologic evolution of Taiwan , 1986 .

[30]  E. Harp,et al.  A method for producing digital probabilistic seismic landslide hazard maps , 2000 .