响水风电基础地震动参数选取及抗震性能分析
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摘要
响水风电场位于江苏省响水沿海滩涂地区,是国内目前单体较大的风电项目。本风电场是Ⅳ类场地条件对抗震不利,因此有必要对基础抗震性能进行验算。首先选取不同地震动参数进行了对比计算,计算表明根据风电场场区地形地貌、区域地质条件确定的地震动参数,考虑土层特性后,地震作用放大较多。然后针对在多遇地震和基本烈度地震两种情况下,综合考虑波浪力、风荷载的联合作用,对风电基础进行抗震验算,计算表明多遇地震烈度时,可满足现行建筑结构抗震规范的要求。基本烈度地震时,结构的应力、内力及其墩台处位移均满足抗震要求,但泥面处位移超过限制要求,泥面位移控制是抗震设计的主要目标。
Xiangshui wind power foundation located in the coastal region of Jiangsu Province is the current larger wind power projects.It is necessary to carry out seismic performance analyses because the Ⅳ site classification is unfavorable.First,different ground motion parameters are compared.Calculations show that seismic performance is enlarged when consideration of site area topography,regional geological conditions and the soil specificity.Then seismic check is carried out combined effects of wave force and wind load under frequently occurred earthquake and basic intensity earthquake.The structure can meet current standard requirements under frequently occurred earthquake.Stress,internal force and pier displacement can meet the seismic requirements under basic intensity earthquake,but soil surface displacement over the limit requirements.Soil surface displacement control is the main objective of seismic design.
Xiangshui wind power foundation located in the coastal region of Jiangsu Province is the current larger wind power projects.It is necessary to carry out seismic performance analyses because the Ⅳ site classification is unfavorable.First,different ground motion parameters are compared.Calculations show that seismic performance is enlarged when consideration of site area topography,regional geological conditions and the soil specificity.Then seismic check is carried out combined effects of wave force and wind load under frequently occurred earthquake and basic intensity earthquake.The structure can meet current standard requirements under frequently occurred earthquake.Stress,internal force and pier displacement can meet the seismic requirements under basic intensity earthquake,but soil surface displacement over the limit requirements.Soil surface displacement control is the main objective of seismic design.
引文
[1]GB18306-2001中国地震动参数区划图[S].北京:中国标准出版社,2001.
[2]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]JGJ94-94建筑桩基技术规程[S].北京:中国建筑工业出版社,1995.
[4]GB50135-2006高耸结构设计规范[S].北京:中国计划出版社,2007.
[5]翟海,谢礼立.抗震结构最不利设计地震动研究[J].土木工程学报,2005,38(12):51-58.
[6]JTJ254-98港口工程桩基规范[S].北京:人民交通出版社,1998.
[7]GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2002.
[2]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]JGJ94-94建筑桩基技术规程[S].北京:中国建筑工业出版社,1995.
[4]GB50135-2006高耸结构设计规范[S].北京:中国计划出版社,2007.
[5]翟海,谢礼立.抗震结构最不利设计地震动研究[J].土木工程学报,2005,38(12):51-58.
[6]JTJ254-98港口工程桩基规范[S].北京:人民交通出版社,1998.
[7]GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2002.
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