地震边坡稳定性计算的时程分析方法研究

Study on Time-history Analysis Method for Stability of Earthquake-induced Side Slope

将结构动力学中的变截面剪切梁振动理论应用到地震诱发滑坡稳定性分析中,探讨了坡体横向地震反应、自振频率和振型方面的计算,结合工程算例,通过振型叠加的Duhamel积分法算出了坡体的振动变形和加速度,实现了对滑坡稳定性的时程分析计算,得到了滑坡体的最小安全系数。

This paper, with application of vibration theory of shear beam with variable cross-section into stability analysis of earthquake-induced side slope, discussed how to calculate lateral seismic response, natural frequency and vibration mode of the side slope mass and, with engineering example, calculated the vibration deformation and acceleration thereof by Duhamel integral of mode superposition, then accomplished the time- history analysis of landslide stability and obtained the rain.