【摘要】 近年来,随着地下结构数量的增多和震害的频繁出现,储液池因功能的特殊性,其抗震设计日益受到重视。场地土的动力特性直接影响储液池结构的抗震性能,因此考虑土层动力特性的土弹簧刚度分析是十分必要的。首先依据场地土类别和结构的固有周期,计算结构的基准水平震度k_h0,使用震度法,依据k_h0计算动荷载并对整体模型进行静力线弹性计算,得到两级地震、四个加震方向共8个工况下与结构相邻各侧土层的平均剪切角γ;其次依据土层G/G₀-γ曲线,计算每个工况下各侧土层动剪切模量值G并分析影响因素;最后由G计算土弹簧刚度用以模拟各侧土和储液池的动力作用关系。通过本文分析,为模拟地下储液池与场地土动力相互作用的土弹簧刚度分析提供了一种简易、可行的方法。更多还原

【Abstract】 In recent years,with the increasing of the underground structure number and the frequent appearance of earthquakes,the seismic design of reservoirs receive increasing attention owing to its particularity of function.Dynamic characteristics of site soil directly affects the seismic performance of underground structures,on which,the analysis of soil spring stiffness considering the dynamic characteristics of the soil is necessary.Firstly,this paper computed the basic seismic intensity k_h0 based on classifications of site soil and the inherent cycle of structures,and then adopted seismic degree method to calculate dynamic loads and the overall elastic model to get the average shear angle γ of soils adjacent to the structure under 8cases（two earthquakes and four directions applied shock）;secondly,dynamic shear modulus G of each side’s soils of every case were calculated and its influence factors were analyzed based on G/G₀-γ curves;finally,soil spring stiffness was calculated to simulate the interaction between soil and reservoir according to G.Through the analysis of this paper,it provided a simple and practical method for analysising soil spring stiffness of simulating the dynamic interactions between the reservoir and soil.更多还原