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。 The dynamic analysis method of effective stress was used to calculate the performance of Douhe Reservoir earth dam in Tangshan earthquake on July 28, 1976. The calculation results show that a part of light-loam soil on the surface of the dam foundation is liquefied, and there is a large area of ​​tensile stress in the dam, with significant settlement and downstream displacement at the crest. Although there is still a large discrepancy in the specific numbers of these manifestations, they are generally in agreement with the observed subsidence and fracture distributions.