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人工土山的地震稳定性评价是其设计与建造过程中的关键问题之一,目前还没有得到很好地解决。采用等效黏弹性分析理论和Newmark滑块位移法对土山的地震永久位移进行研究,分析了不同高度、坡度和地震动条件下人工土山的地震永久位移。发现当坡度较缓时,山坡最大位移滑块和拟静力法的最危险滑块不论是所处位置还是大小均有较明显差别。最后,根据土山最大地震永久位移量和屈服加速度的关系,提出利用屈服加速度估算人工土山地震永久位移的简便计算方法。
The evaluation of seismic stability of artificial earth hill is one of the key problems in the design and construction process, and it has not been well solved yet. Equivalent viscoelasticity analysis theory and Newmark slider displacement method are applied to study the permanent earthquakes displacement of earth mounds under different altitudes, slopes and earthquakes. It is found that when the gradient is relatively slow, the most dangerous sliders on the hillside and the most dangerous slide on the quasi-static method are obviously different in position and size. Finally, according to the relationship between the permanent earthquakes displacement and the yield acceleration, a simple method to calculate the permanent earthquakes displacement using yield acceleration is proposed.