（重庆大学土木工程学院， 重庆 400045）

［摘要］在地震作用下考虑土-结相互作用（SSI）效应对输电塔结构影响的研究已经比较成熟，而在风荷载作用下考虑SSI效应对输电塔结构影响的研究还相对较少。以一座特高压直流线路直线塔为例，建立了输电塔-基础-地基的完整数值模型，分析了风荷载作用下不同阻尼比和刚度的地基土对上部输电塔结构响应的影响。结果表明,地基土阻尼比较小时，考虑SSI效应后上部结构的响应增大；地基土阻尼比越大，上部结构加速度风振响应越小，而上部结构位移响应基本没有变化；地基土刚度越小，上部结构的加速度和位移响应越大。总体来说，SSI效应对输电塔结构不利。

［关键词］土-结相互作用(SSI)效应； 风荷载； 输电塔； 风振响应

中图分类号：TU311-3文献标识码：A文章编号：1002-848X(2018)13-0063-04

Analysis on wind-induced response of extra-high voltage transmission tower considering soil-structure interaction (SSI) effect

Yan Menglin, Li Zhengliang, Yu Cong, Li Wen, Yang Xiaoyang

(School of Civil Engineering, Chongqing University, Chongqing 400045, China)

Abstract:The studies on the influence of soil-structure interaction（SSI）effect on the structure of transmission towers under seismic action have been relatively mature. However, the studies on the influence of SSI effect on the structure of transmission tower under wind load are still relatively few. Taking an extra-high voltage direct-current straight-line tower as an example, a complete numerical model of the transmission tower-foundation-base was established, and the influence of different damping ratios and stiffness of foundation soil on the structural response of the upper transmission tower under wind load were analyzed. The results show that the damping ratio of the foundation soil is relatively small, and the response of the superstructure increases when the SSI effect is considered. The greater the damping ratio of the foundation soil is, the smaller the wind-induced response of the acceleration of the upper structure is, but the displacement of the superstructure basically has no change; the smaller the stiffness of the foundation soil is, the greater the acceleration and displacement responses of the superstructure is. Overall, the SSI effect is detrimental to the transmission tower structure.

Keywords:soil-structure interaction(SSI) effect; wind load; transmission tower; wind-induced response

作者简介：严梦麟，硕士研究生，Email:2827444924@qq.com。