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本文基于对往返荷载下饱和砂土瞬态有效抗剪强度的已有认识,提出了较为合理的方法来定量分析饱和砂土振动三轴试验中土试样惯性力、动粘滞阻力和仪器系统阻尼力三个重要因素。从而证明了,在一般地震作用的振动频率变化范围内,饱和砂土的动有效抗剪强度指标有着十分稳定的变化规律。本文也表明了分析复杂的土动力试验成果时,正确运用一般力学原理的重要性。
Based on the existing understanding of the transient shear strength of saturated sand under cyclic loading, this paper proposes a reasonable method to quantitatively analyze the inertial force, dynamic viscous resistance and instrument system of soil samples in saturated sand triaxial tests. Three important factors of damping force. Thus, it is proved that the dynamic effective shear strength index of saturated sand has a very stable variation rule within the range of vibration frequency of general earthquake. This paper also shows the importance of the correct use of general mechanical principles when analyzing complex soil dynamic test results.