一、引言按动力分析确定重力坝的地震荷載时,应計入其作为大体积混凝土水工建筑物的特点,这些特点是:(1)庫水、坝体变形条件及地基变形的影响,(2)考虑竪向振动。关于坝体滿庫时的振动,严格地耕,应将坝体及庫水作为一个振动体系来考虑,在用广义座标求解此問題时,地震荷載可以通过坝体空庫时的自振特性来表达。在实际应用中,有将庫水影响作为坝体附加貭量計入的。为此,需确定动水压力值,日本小坪清真并給出了計入坝面弹性变形的較为完善的計算公式。所以,問題可归結为求解坝体 I. INTRODUCTION When determining the seismic load of gravity dam according to dynamic analysis, it should be taken into account as a characteristic of massive concrete hydraulic structures. These characteristics are: (1) the influence of deformation of the reservoir and dam and the deformation of foundation ( 2) Consider vertical vibration. As to the vibration when the dam is full of reservoirs and strictly plowing, the dam body and the reservoir water should be considered as a vibration system. When using the generalized coordinate to solve this problem, the seismic load can pass through the free vibration characteristics To express. In practical application, the influence of reservoir water is taken into account as an additional quantity of dam. To this end, we need to determine the hydrodynamic pressure value, the Japanese Xiao Ping Halal and gives a more complete calculation of the elastic deformation of the dam surface. So, the problem can be attributed to solving the dam