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结合某核电站泵房半埋置式结构特点,分别分析使用经验公式法和数值分析法计算地震输入的局限性,指出直接采用基岩地表的地震动输入计算半埋置结构往往过大.为此提出一种考虑半埋置效应的地震输入的修正方法.该方法需要已知人工边界处土体节点地震位移和速度,然后通过对地震加速度时程进行积分,得到底层深度处土体速度和位移时程曲线.
According to the semi-buried structure of pumping station in a certain nuclear power station, the limitations of seismic input using empirical formula method and numerical analysis method are respectively analyzed. It is pointed out that the semi-embedded structure calculated by directly inputting ground motion of bedrock surface is often too large A modified method of seismic input considering semi-buried effect requires that the seismic displacement and velocity of soil nodes at the artificial boundary be known and then the velocity and displacement of the soil at the bottom depth are obtained by integrating the seismic acceleration time history Curve.