水文地质工程地质2018，Vol.45Issue(2)：77-83,7.DOI:10.16030/j.cnki.issn.1000-3665.2018.02.12
地震波频率对层状岩质边坡动力响应影响的试验研究
Test research on the influence of seismic wave frequency on the dynamic response of a layered rock slope
摘要
Abstract
The dynamic response of an anti-dip layered rock slope is examined by using shake table model tests.By inputting sine waves of different frequencies,excitation intensity and holding time,the acceleration of response of the model slope is monitored,and the influence of frequency on the dynamic response characteristics of acceleration of the model slope is analyzed emphatically.The results show that ① there are two different forms of the influence of frequency of seismic wave on dynamic response of the model slope.When frequency of the input wave is less than or equal to the natural frequency of the model slope,with the increasing frequency,the elevation amplification effect of the model slope is enhanced.② When frequency of the input wave is greater than the natural frequency of the model slope,with the increasing frequency,the elevation amplification effect of the model slope is weakened or even disappears.The dynamic response of the model slope decreases first and then increases with the increasing the elevation.The acceleration response at the bottom of the model slope is relatively stronger,even greater than the response intensity of the upper and middle parts.The acceleration magnification factor at each point of the model slope is almost all less than 1.0.③ The wave whose frequency is less than or equal to the natural frequency often causes deformation and failure of the top and superficial parts of the model slope and the wave whose frequency is greater than the natural frequency causes the deformation of the bottom of the model slope.④ Frequency,excitation intensity and holding time have an influence on the dynamic response of the model slope,but the frequency has the most significant impact,followed by the intensity of vibration,and the impact of holding time is the weakest.关键词
振动台试验/层状边坡/频率/动力响应/加速度放大系数Key words
shaking table test/rock slope/frequency/dynamic response/acceleration magnification factor分类
建筑与水利引用本文复制引用
刘汉东,牛林峰,袁富强,王忠福,姚亮,宁长春..地震波频率对层状岩质边坡动力响应影响的试验研究[J].水文地质工程地质,2018,45(2):77-83,7.基金项目
国家科技支撑计划项目资助(2015BAB07B08) （2015BAB07B08）
华北水利水电大学研究生教育创新计划项目资助(YK2016-04) （YK2016-04）
