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本文为堆石坝抗震研究系列报告之一,着重介绍了刚性地基上梯形断面的散填体模型对地基简谐振动的动态响应及其规律。系统地研究了模型各层加速度分布及其放大因子β与地基运动加速度α_g的关系。从大量模型实验结果得到的β与α_g曲线具有较强的规律性。同时对振动过程中坡面滑动现象作了定性的观测和描述。观测到的加速度分布、坡面滑动与滑块模型分析结果颇相一致。
This paper is one of the series of reports on the seismic study of rockfill dams. It focuses on the dynamic responses and laws of the harmonic vibration of the foundation on the trapezoidal section of a rigid foundation. The relationship between the acceleration distribution of each layer of the model and its amplification factor β and the ground motion acceleration α_g is systematically studied. The β and α_g curves obtained from a large number of model experiments have strong regularity. Simultaneously qualitative observation and description of the slope sliding phenomenon in the vibration process. The observed acceleration profile, slope slide, and slider model analysis are quite consistent.