摘要
拟静力法是评价地震边坡稳定性的常用方法之一,该方法中地震系数的选择直接关系到评估结果的准确性。因此,深入研究拟静力法中地震系数的确定方法和取值具有重要的理论与工程实际意义。文章依据剪切梁理论,推导了直角梯形边坡的地震边坡响应加速度公式,同时分析了各因素对边坡响应加速度的影响,并确定了不同地震烈度下的地震系数推荐值。最终确定地震烈度分别为Ⅵ、Ⅶ、Ⅷ、Ⅸ度时,所对应的地震系数推荐值分别为0.04,0.07,0.11,0.21。研究结果能够反映边坡的动力响应特征,为地震系数的选择提供科学的理论支持。
Pseudo-static method is a common used approach to evaluate the seismic stability of slopes,where the choice of seismic coefficients directly affects the accuracy of the evaluation.Therefore,thoroughly exploring the determination methods and values of seismic coefficients in the quasi-static method is of great significant both theoretically and in engineering practice.Based on shear beam theory,this paper derives the formula for the seismic response acceleration for rectangular trapezoidal slopes and analyzes the impact of various factors on slope response acceleration.Recommended seismic coefficients under different seismic intensities were determined as follows:0.04 for IntensityⅥ,0.07 for IntensityⅦ,0.11 for IntensityⅧ,and 0.21 for IntensityⅨ.The research results reflect the dynamic response characteristics of slopes and provide scientific theoretical support for the selection of seismic coefficients.
作者
王梦晨
邓亚虹
慕焕东
杨楠
钱法桥
WANG Mengchen;DENG Yahong;MU Huandong;YANG Nan;QIAN Faqiao(College of Geology Engineering and Geomatics,Chang’an University,Xi’an,Shaanxi 710054,China;Key Laboratory of Mine Geological Hazards Mechanism and Control,MNR,Xi’an,Shaanxi 710054,China;Institute of Geotechnical Engineering,Xi’an University of Technology,Xi’an,Shaanxi 710048,China)
出处
《中国地质灾害与防治学报》
CSCD
2024年第6期98-105,共8页
The Chinese Journal of Geological Hazard and Control
基金
国家自然科学基金项目(41772275)。
关键词
地震边坡稳定分析
拟静力法
剪切梁理论
边坡动力响应
地震系数
seismic slope stability analysis
pseudo-static method
shear beam theory
slope dynamic response
coefficient of earthquake
