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本文首先用共振柱研究小应变动剪切模量的各向异性问题,然后阐述了在土工结构动力分析中如何考虑土动力变形特性的各向异性,最后给出了考虑土动力变形特性各向异性动力分析的实例计算结果,并与通常假定土动力变形特性为各向同性的动力分析的结果进行比较.计算结果表明:对于具有很强各向异性的土工结构物和地基,当需要考虑垂直向振动时目前所用把土动力变形特性假定成各向同性方法得到的结果是偏于不安全的.
In this paper, firstly, the anisotropic problem of the small-shear shear modulus is studied by using a resonance column, and then the anisotropy of the dynamic deformation characteristics of the soil is analyzed in the dynamic analysis of the geotechnical structure. Finally, the anisotropic properties of the soil considering the dynamic deformation of the soil are given. The results of an example of an isotropic dynamic analysis are compared with the results of a dynamic analysis that generally assumes that the dynamic deformation characteristics of the soil are isotropic. The calculation results show that for geosynthetic structures and foundations with strong anisotropy, vertical considerations need to be considered. The results obtained by assuming the isotropic nature of the soil dynamic deformation characteristics currently used in vibration are precariously insecure.