傾斜地盤震動台模型試驗之數值模擬分析

Numerical Simulation for Shaking Table Tests of Sloping Ground

許宗傑(Chung-Chieh Hsu)

《國立金門技術學院學報》 4期 (2010/01) Pp. 117-131

https://doi.org/10.7057/JNKIT.201001.0117

摘要

在大地工程研究領域及工程實務上，傾斜地盤受震引致土壤液化後之側向變位評估為一項重要課題。本研究採用有限差分程式FLAC2D，針對傾斜地盤受震液化所引致之側向變位現象進行模擬分析。應用程式內建之Martin孔隙水壓模型，建立有效應力分析模式，並藉由兩組震動台模型試驗之模擬分析，以驗證數值模式之合理性。分析結果顯示，本研究所提出之數值分析模式能夠合理模擬傾斜地盤受震液化後之側向變位行為與特性，並提供準確性良好之模擬結果。

關鍵字

土壤液化 ； 側向變位 ； 數值模擬

並列摘要

Evaluating the amount of lateral displacement induced by soil liquefactions is an important task for academic research as well as engineering applications. For numerical modeling, the program FLAC2D is used to simulate the phenomenon of lateral spreading induced by soil liquefactions. The analysis performed is the effective stress approach modeled with Martin's pore pressure model. Analysis on two sets of shaking table tests are implemented to verify the applicability of the numerical model proposed herein. The results show that the numerical approach can reasonably and accurately simulate the behavior of lateral displacement of liquefied ground.

並列關鍵字

soil liquefaction ； lateral displacement ； numerical modeling