考虑SSI效应的适用于风电结构设计的地震反应谱  

Seismic Response Spectrum for Wind Turbine Design Considering SSI Effect

作　　者：白久林 龚彦安[1,2] 李晨辉 王宇航 BAI Jiulin;GONG Yan’an;LI Chenhui;WANG Yuhang(Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education(Chongqing University),Chongqing 400045,China;State Key Laboratory of Coastal and Offshore Engineering(Dalian University of Technology),Dalian 116024,China)

机构地区：[1]山地城镇建设与新技术教育部重点实验室(重庆大学),重庆400045 [2]海岸和近海工程国家重点实验室(大连理工大学),辽宁大连116024

出　　处：《湖南大学学报（自然科学版）》2022年第11期170-179,共10页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51822804);重庆市社会民生科技创新专项(cstc2016shms-zd30001);海岸和近海工程国家重点实验室开放基金资助项目(LP2010)。

摘　　要：针对风电结构的低阻尼特性及设计反应谱未考虑土-结构相互作用(Soilstructure Interacton,SSI)的问题,提出了考虑SSI效应的适用于风电结构设计的地震反应谱.选取具有不同场地特征的3034条地震动,并按照建筑抗震规范进行场地分类;基于无质量集总参数模型,建立了风电结构考虑SSI效应的单自由度分析模型.基于大样本地震动结果的统计分析与非线性最小二乘技术,形成了新反应谱的规范形式.分析表明,对于低阻尼比,新反应谱值大于规范谱值,比传统采用建筑抗震规范反应谱的计算更加安全.提出的新反应谱概念清晰、形式简便,可为风电结构的抗震初步设计提供依据.The wind turbine is an atypical high-rise structure with a low damping ratio,and its seismic response spectrum is designed without considering the soil-structure interaction(SSI).Therefore,the seismic response spectrum of wind turbine design is proposed considering the SSI effect.3034 ground motions with different characteristics are selected and classified according to the building seismic code.Based on the S-R model,a single degree of freedom analysis model of wind power structure considering the SSI effect is established.Based on the statistical analysis of large sample local vibration results and the nonlinear least squares technique,the standard form of the new response spectrum is generated.The analysis shows that the proposed new response spectrum is larger than the standard one at a low damping ratio,and it is safe when compared with the traditional calculation based on the build ing seismic design code.The new response spectrum presented in this paper has a clear concept and simple form,which can provide a basis for the seismic design of wind power structures.

关 键 词：风电结构 反应谱 抗震设计 土-结构相互作用 阻尼比 

分 类 号：TU352[建筑科学—结构工程]