Study on sliding behavior of slope using small scale shaking table
Date Issued
2010
Date
2010
Author(s)
Chen, Yung-Sheng
Abstract
The Chi-Chi earthquake struck Taiwan in 1999 which induced numerous landslides. Using pseudo static and sliding block analysis for seismic slope analysis usually involve simplified assumptions. In order to understand the behavior of slope subjected to earthquake, Wang (2003) used large-scale shaking table model test in NCREE to observe the dynamic behavior of slope. A small-scale shaking table was developed in laboratory in 2004 to facilitate the laboratory slope model test with the advantage of easy operation and specimen preparation.
The objective of this research is to simulate landslide behavior using small-scale shaking table. The control factors including slope height and slope angle have been changed during tests. The images of model slope behavior were recorded during tests and image analysis where performed using PIV to tract the displacement vectors when landslide initiated. The infrared rays were used to scan the surface of specimen, which measured the differences in geometry of specimen before and after test. The deformation of slope was measured based on the average of three profiles, and with motion vectors along the slope. The slip surfaces can be constructed base on geometry method.
It is found that displacement will concentrate at the top of slop when failure occurs, and the sliding behavior is similar to block sliding. Result of PIV analyze also support the sliding-block behavior of the model slope. The slip surfaces constructed using geometry method is shallow, and appears to be consistent with FLAC, The slip surfaces of model test and numerical analysis.
Subjects
shaking table
Type
thesis
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