摘要
分析了解边坡动力响应规律,为边坡在地震作用下的稳定性分析提供依据。借助有限差分数值模拟软件,建立均质边坡模型,通过对模型输入不同类型的地震波,研究分析模型内部的加速度放大系数和速度放大系数的分布规律。可以得知,模型内部的加速度放大系数、速度放大系数的分布自坡脚向坡顶逐渐增大,在坡顶处达到最大值,且等值线分布均匀。对于不同类型的地震波,当地震波卓越频率较小时,地震波中少量的高频部分对加速度放大系数影响较小;当输入地震波卓越频率越大且与边坡自振频率越接近时,地震响应越剧烈。
Analyzing and understanding the dynamic response law of slope can provide the basis for the stability analysis of slope under earthquake action.By means of finite difference numerical simulation software,the homogeneous slope model is established.In this paper,by inputting different types of seismic waves into the model,the distribution law of acceleration amplification coefficient and velocity amplification coefficient in the model is studied and analyzed.It can be seen that the distribution of acceleration amplification coefficient and velocity amplification coefficient inside the model gradually increases from the foot of the slope to the top of the slope,reaching the maximum value at the top of the slope,and the contour lines are evenly distributed.As for different types of seismic waves,a small amount of high frequency part in the seismic wave has little effect on the acceleration amplification coefficient when the local seismic wave has a small outstanding frequency.When the superior frequency of the input seismic wave is larger and closer to the natural vibration frequency of the slope,the seismic response is more intense.
作者
张永荣
ZHANG Yongrong(Fuzhou Investigation and Surveying Institute Co.LTD,Fuzhou 350108)
出处
《福建建筑》
2023年第6期95-98,共4页
Fujian Architecture & Construction
关键词
地震波
边坡动力响应
稳定性分析
数值模拟
Seismic wave
Slope dynamic response
Stability analysis
Numerical simulation
