摘要
针对地震作用下的边坡稳定性分析,基于反应谱理论,提出了一种同时考虑了地震动力特性的反应谱法动态分析方法。该方法通过震动峰值加速度和边坡各岩土体单元的节点地震响应加速度谱值,计算出单元的地震影响系数,进而进行强度折减,得到滑动面的安全系数。在此基础上,对某边坡进行了动力稳定性分析,首先采用ANSYS分析地震作用下的边坡模态和反应谱,结合FLAC^(3D)计算弹塑性变形下的边坡稳定性,得出不同工况下边坡稳定性安全系数。实践表明,反应谱法动态分析对地震作用下边坡稳定性具有较好的理论与应用价值。
Based on the response spectrum theory,a dynamic analysis method of response spectrum method considering seismic dynamic characteristics was proposed.In the proposed method,the seismic influence coefficient of each element was calculated through the peak acceleration of vibration and the acceleration spectrum of node seismic response of each rock and soil element of slope,and then the strength reduction was carried out to obtain the safety factor of sliding surface.On this basis,the dynamic stability analysis of a slope was carried out.Firstly,ANSYS was used to analyze the slope mode and response spectrum under earthquake action,and the slope stability under elastic-plastic deformation was calculated by FLAC^(3D),and the slope stability safety factors under different working conditions were obtained.The practice shows that the dynamic analysis of response spectrum method has better theoretical and practical value for slope stability under earthquake action.
作者
梁健伟
陈海啸
戴旭明
张润明
曾伟雄
LIANG Jian-wei;CHEN Hai-xiao;DAI Xu-ming;ZHANG Run-ming;ZENG Wei-xiong(China Energy Engineering Group Guangdong Electric Power Design Institute Co., Ltd., Guangzhou 510663, China;School of Engineering, China University of Geosciences, Wuhan 430074, China;Institute of Rock and Soil Mechanics, Chinese Academy of Sciences,Wuhan 430071, China)
出处
《科学技术与工程》
北大核心
2021年第28期12210-12217,共8页
Science Technology and Engineering
基金
国家自然科学基金(51774267)
湖北省自然科学基金(2019CFB535)。
关键词
反应谱
边坡
动力
地震
稳定性
response spectrum
side slope
power
earthquake
stability
