【摘要】 采用有效应力的动力分析法计算了陡河水库土坝在1976年7月28日唐山地震中的表现。计算结果表明:坝基表层轻壤土的一部分发生了液化,坝体内存在大面积拉应力区,坝顶有显著的沉降及向下游的位移。这些表现虽然在具体数量上还有较大差距,但大体上与实际观测到的沉降位移和裂缝分布相符。更多还原

【Abstract】 The effective stress method of dynamic analysis is used to explain the performance of Douhe Earth Dam during Tangshan Earthquake on July 28, 1976. It is shown that the liquefaction is possible in some part of the top layer of sandy loam in the dam foundation and there is extensive zone of tensile stress in the dam body and remarkable vertical settlement and horizontal displacement in its downstream part. The main aspect of computed result is in good agreement with the deformation and the distribution of tension crack in the dam body actually observed, although there still exists some deviation between the computed and measured values.更多还原