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（重慶大學(xué)土木工程學(xué)院， 重慶 400045）
［摘要］在地震作用下考慮土-結(jié)相互作用（SSI）效應(yīng)對輸電塔結(jié)構(gòu)影響的研究已經(jīng)比較成熟，而在風(fēng)荷載作用下考慮SSI效應(yīng)對輸電塔結(jié)構(gòu)影響的研究還相對較少。以一座特高壓直流線路直線塔為例，建立了輸電塔-基礎(chǔ)-地基的完整數(shù)值模型，分析了風(fēng)荷載作用下不同阻尼比和剛度的地基土對上部輸電塔結(jié)構(gòu)響應(yīng)的影響。結(jié)果表明,地基土阻尼比較小時(shí)，考慮SSI效應(yīng)后上部結(jié)構(gòu)的響應(yīng)增大；地基土阻尼比越大，上部結(jié)構(gòu)加速度風(fēng)振響應(yīng)越小，而上部結(jié)構(gòu)位移響應(yīng)基本沒有變化；地基土剛度越小，上部結(jié)構(gòu)的加速度和位移響應(yīng)越大?？傮w來說，SSI效應(yīng)對輸電塔結(jié)構(gòu)不利。
［關(guān)鍵詞］土-結(jié)相互作用(SSI)效應(yīng)； 風(fēng)荷載； 輸電塔； 風(fēng)振響應(yīng)
中圖分類號：TU311-3文獻(xiàn)標(biāo)識碼：A文章編號：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
作者簡介：嚴(yán)夢麟，碩士研究生，Email:2827444924@qq.com。
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