采用通用有限元软件 ANSYS，针对某软土地基上土 － 基础 － 黏弹性阻尼器减震 框架结构进行了三维有限元分析． 计算中土体的本构模型采用等效线性模型，土体的侧向 边界采用黏弹性人工边界，研究了改变黏弹性阻尼器的阻尼系数、土体的软硬程度和基础 形式等参数时，土 －结构相互作用( 简称 SSI) 对黏弹性阻尼器减震效果影响的变化规律． 结果表明:随着黏弹性阻尼器阻尼系数的增大，土 －结构相互作用对其减震效果的影响程 度先增大后减小;黏弹性阻尼器的减震效果总体上随着土体的变硬而变好;设置黏弹性阻 尼器的结构采用桩筏基础的减震效果优于采用箱型基础的．

In this paper three-dimensional finite element analysis is carried out for dynamic soil-structure interaction of a practical building with additional viscoelastic dampers． General purpose finite element program ANSYS is used in the analysis． A commonly used equivalent linearity model is chosen as the constitutive relation of soil． Viscousspring boundary of soil is implemented． The influence of parameters such as damping coefficient of viscoelastic dampers，soil property and foundation types on efficiency of viscoelastic dampers is discussed． The analytical results indicate that the influence of SSI effects on efficient of viscoelastic dampers increases at first and then decreases with the rise of the damping coefficient of viscoelastic dampers; the efficient of viscoelastic dampers increases in general with the increment of the dynamic shear modulus of soil; the efficient of viscoelastic dampers on pile-raft foundation structure is better than that on box foundation structure．