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为了揭示路堤高边坡对地震荷载的响应及动力安全系数的时程变化规律,以实际工程为例,利用动力有限元法,分析了边坡应力应变指标与地震荷载的关系。结果表明,由于边坡的阻尼特性,坡体内各点的地震响应比较复杂,并且不同步,边坡的动力安全系数介于静力安全系数与拟静力安全系数之间,规范规定的拟静力法所求出的安全系数偏于安全,动力有限元法能清楚地揭示边坡的地震响应规律,适用于各类岩土工程的地震响应分析。
In order to reveal the response of the high embankment to the seismic load and the time history of the dynamic safety factor, the dynamic finite element method is used as an example to analyze the relationship between the slope stress and strain index and the seismic load. The results show that due to the damping characteristics of the slope, the seismic response of each point in the slope is complex and unsynchronized, and the dynamic safety factor of the slope is between the static safety factor and the quasi-static safety factor. The quasi-static The safety factor obtained by the force method is biased to safety. The dynamic finite element method can clearly reveal the seismic response law of the slope and is applicable to the seismic response analysis of all kinds of geotechnical engineering.