华南理工大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (4): 121-128,136.doi: 10.3969/j.issn.1000-565X.2018.04.017

• 土木建筑工程 • 上一篇    下一篇

黏弹性阻尼器减震结构考虑SSI的参数分析

李培振 舒欣 杨金平    

  1. 同济大学 土木工程防灾国家重点实验室,上海 200092
  • 收稿日期:2017-05-12 修回日期:2018-01-09 出版日期:2018-04-25 发布日期:2018-03-01
  • 通信作者: 李培振( 1975) ,男,博士,研究员,主要从事结构抗震研究. E-mail:lipeizh@tongji.edu.cn
  • 作者简介: 李培振( 1975) ,男,博士,研究员,主要从事结构抗震研究.
  • 基金资助:
     国家自然科学基金资助项目( 51478355) 

Parametric Analysis of Structure with Additional Viscoelastic Dampers Considering Soil-Structure Dynamic Interaction
 

 LI Peizhen SHU Xin YANG Jinping    

  1.  State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China
  • Received:2017-05-12 Revised:2018-01-09 Online:2018-04-25 Published:2018-03-01
  • Contact: 李培振( 1975) ,男,博士,研究员,主要从事结构抗震研究. E-mail:lipeizh@tongji.edu.cn
  • About author: 李培振( 1975) ,男,博士,研究员,主要从事结构抗震研究.
  • Supported by:
     Supported by the National Natural Science Foundation of China( 51478355)

摘要: 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.

关键词: 土 -结构相互作用, 黏弹性阻尼器, 有限元, 参数分析, 消能减震 

Abstract: 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. 

Key words: soil-structure interaction, viscoelastic damper, finite element, parametric analysis, energy dissipation 

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