地震动荷载作用下公路边坡永久位移
发布时间：2018-01-26 15:19
本文关键词： 道路工程 地震 边坡 永久位移 三维离散元 出处：《长安大学学报(自然科学版)》2014年06期 论文类型：期刊论文
【摘要】：针对地震动作用下影响公路边坡稳定性的关键因素,采用三维离散元动力响应分析方法,建立了公路边坡三维离散元模型,确定了动力计算的主要参数,选取不同坡高、坡度、岩层倾角以及不同地震波参数进行组合,研究了公路边坡在地震动荷载作用下永久动力位移的响应规律。研究结果表明:在坡高10~70m范围内,边坡的永久动力位移随坡高的增大而单调增大;边坡坡度在50°左右时永久位移达到最大;边坡位移随着地震波频率增加而减少,当频率超过10Hz时,边坡位移随频率的增加变化不大,趋于稳定;高烈度地震区路线边坡设计应控制边坡高度,避免50°左右的边坡坡度,宜选择小于30°的边坡设计;基于三维离散元的边坡永久动力位移分析方法计算结果准确可行。
[Abstract]:The earthquake under the action of the key factors affecting the stability of highway slope, using three-dimensional discrete element dynamic response analysis method, established the slope three-dimensional discrete element model, the main parameters of the power calculation to determine the selection of different slope height, slope, dip angle and different seismic wave parameters are studied, the seismic response of highway slope law of permanent displacement under dynamic loads. The results show that: in the high slope in the range of 10~70m, the permanent displacement of the slope with high power slope increases monotonically increases; slope at about 50 degrees when the permanent displacement reaches the maximum; slope displacement decreases with the increase of frequency of seismic wave, when the frequency is more than 10Hz, the slope with the increase of the frequency displacement changes little, tends to be stable; high intensity earthquake zone line slope design should be controlled to avoid the slope height, slope of about 50 degrees, should be less than 30 degrees In the slope design, the results of the analysis of the permanent dynamic displacement of the slope based on the three-dimensional discrete element method are accurate and feasible.
【作者单位】： 长安大学特殊地区公路工程教育部重点实验室;林同h旯使こ套裳邢薰，
本文编号：1465938
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