The Model Simulation for Seismic Slope Behavior
Date Issued
2010
Date
2010
Author(s)
Hsu, Hsiao-Yuan
Abstract
Taiwan is situated on the earthquake-prone Pacific Rim. It is mountainous so slope failure is one of the common natural disasters in Taiwan. To further understand the mechanism of landslides triggered by earthquake and its seismic behavior, Lin and Wang have conducted large scale seismic slope model tests at the NCREE since 2003. To simulate the results to supplement the Full scale test, Wang developed the small-scale shaking table in 2004.
This research used small-scale shaking table to simulate seismic slope behaviors. Nine separate experiments were done to correlate crest development、toe development and run-out distance with changing slope height and angle. During the test a high speed camera was used to record slope sliding, PIV analysis was performed to understand the slope displacement variations. Also laser scanning was used before and after to get the average profile of slope for quantitative analysis of slope elevation change. Preliminary results show that when there is a significant change in the slope, laser scanning helps providing quantitative analysis. From PIV analysis results and accelerometer results, the failure time can be determined. Using punctuation displacement method we figure out where the sliding surface is, from sliding surface the critical acceleration in Newmark’s method was calculated along with the run-out distance.
Numerical software FLAC was used tosimulate results of physical models. From numerical model results were compared to PIV results when analyzing time-displacement relations during slope sliding. Through numerical simulation we can calculate the location of sliding, and compare it with punctuation displacement method. At the top of the slope it is the same, but at the toe of slope FLAC shows a shallower sliding surface.
Subjects
Acceleration
Slope failure
FLAC
PIV
SDGs
Type
thesis
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