Performance-based assessment of earthquake-induced catastrophic landslide hazard in liquefiable soils |
| |
| Authors: | Aurelian Catalin Trandafir Kyoji Sassa |
| |
| Institution: | (1) Slope Conservation Section, Geohazards Division, Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji 611–0011, Kyoto, Japan;(2) Research Centre on Landslides, Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji 611-0011, Kyoto, Japan |
| |
| Abstract: | This paper outlines a methodology for evaluating the likelihood of catastrophic landslide occurrence on gentle slopes in liquefiable
soils during earthquake. The approach is based on a modified Newmark sliding block model of assessing the earthquake-induced
undrained landslide displacements for conditions of no shear stress reversals on the sliding surface. By employing the shear
resistance-displacement relationship from undrained monotonic ring shear tests, the simulation model incorporates the sensitivity
of computed displacements to variations in yield acceleration. The proposed approach involves an examination of undrained
seismic slope performance under various horizontal seismic waveforms scaled to different specific values of the peak earthquake
acceleration. An example problem illustrates how the proposed methodology may be used to demarcate, based on the magnitude
of permanent seismic displacement, the levels of low, moderate and high risk of catastrophic landslide on a gentle slope in
a saturated cohesionless soil susceptible to liquefaction during earthquake. |
| |
| Keywords: | catastrophic landslide hazard earthquakes liquefiable soil seismic displacements slopes |
| 本文献已被 SpringerLink 等数据库收录！ |
|
