[CS2-05] Effect of soil structure disturbance on the vertical stress degradation black volcanic ash soil under cyclic loading
キーワード:Soil structure, Vertical stress, Cyclic, Direct shear box
The soil structure disturbance effect due to the earthquake shakes on the vertical stress degradation was evaluated using a simple method that considers the pore size distribution that is reflected from the soil-water characteristic curve. In addition, the constant volume direct shear box considering cyclic tests was carried out. It was found that the undisturbed samples exhibit a unimodal pore structure, and the disturbed showed a bimodal pore. Since the pore structure of the disturbed sample is unstable, the degradation index value is higher than that of the undisturbed sample.
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