工程地质学报2016，Vol.24Issue(5)：959-966,8.DOI:10.13544/j.cnki.jeg.2016.05.027
层状斜坡振动台实验的频谱特性研究
SPECTRUM CHARACTERISTICS OF STRATIFIED ROCK SLOPES USING SHAKING TABLE TEST
摘要
Abstract
By means of large-scale shaking table test,this paper analyzes the dynamic response of stratified hard rock and soft rock slopes with anti-dipping strata or dipping strata subject to strong earthquakes.The results show that:the seismic signal of the slope shoulder contains the characteristic of the slope structure and material.The processed signal using Fast Fourier Transform Algorithm contains some feature of the slope itself.This method is practical in the shaking table test.The FFT spectrum of discrete frequency signal shows that the derivative frequency of the anti-dip slope is higher than that of the dip slope under the vertical seismic force.And as horizontal seismic force is applied,the hard rock dip slope and the soft rock anti-dip slope have higher magnitude and their predominant frequency is more concentrated than those the hard rock anti-dip and soft rock dip slope.The seismic response of the hard rock dip slope is more significant than that of the soft rock dip slope.As a natural earthquake record is applied to the model vertically,the FFT spectrum of the dip slope has the same pattern as the shaking table,and the anti-dip slope has more magnification in certain frequency.While a horizontal natural record is applied,the four models show more consistency,which means at this condition,the influence of structure and the lithology are non-significant.关键词
振动台试验/频谱特性/失稳机理/动力响应特征/坡体结构Key words
Shaking table test/Spectrum characteristic/Failure mechanism/Dynamic response of slopes/Slope structure分类
天文与地球科学引用本文复制引用
李果,华宏亮,赵建军..层状斜坡振动台实验的频谱特性研究[J].工程地质学报,2016,24(5):959-966,8.基金项目
NSFC-云南联合基金重点支持项目(U1402231)资助 （U1402231）
