摘要
基于弹性波动理论,利用水平分层法,建立微元体的受力平衡微分方程,借助Hilbert-Huang变换,结合边界条件,应用振型分解法和正交理论推导双面岩质高陡边坡加速度高程放大效应的时频分析方法,并通过振动台试验和数值模拟验证该方法的合理性。该方法不仅能够很好地考虑地震波三要素(峰值加速度、频率以及持时)对加速度高程放大性的影响,而且能够从理论计算的角度来解释坡体的"鞭梢效应"问题。
Based on the elastic wave theory,the force balance differential equation is established by using the horizontal slice method. The time-frequency analysis method of the amplification of accelerations of the high steep hill with two-side slopes is derived,and the reasonability of this method is verified by the results of shaking table test and numerical simulation. This method not only can consider the effect of the three factors of the seismic wave which are peak ground acceleration,frequency and duration on the amplification of accelerations of the high steep hill with two-side slopes,but also can illustrate the whiplash effect of the slope theoretically.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第A02期3699-3706,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金青年基金项目(51408510)
2014年度黄土地区公路建设与养护技术交通行业重点实验室开放课题资助项目
2014年西南交通大学青年教师百人计划资助项目
关键词
边坡工程
双面岩质高陡边坡
加速度
放大效应
时频分析方法
slope engineering
high steep hill with two-side slopes
acceleration
amplification
time-frequency analysis method
