双向地震动输入对高层隔震结构的响应影响研究
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摘要
我国现行建筑抗震设计规范中对于隔震结构分析时地震动的单双向输入问题并无明确说明。鉴于高层隔震结构及隔震支座体系的特殊性,本文对西昌(9度区)某高层隔震结构进行分析,选取了7组地震动,比较了双向地震动输入与单向地震动输入相比后该高层隔震结构的加速度、位移、支座应力等响应的差别。研究发现高层隔震结构的四个角部支座在单向地震动输入下拉、压应力未超过规范规定限值,而在双向地震动输入下均超过规范规定限值。针对双向输入时隔震支座出现的应力超限问题,提出了解决方案。建议在对隔震结构尤其是高层隔震结构进行计算分析时,采用双向地震动输入并加强抗拉支座的研发工作。
In the Code for Seismic Design of Buildings in China,there are no specifications that unilateral or bilateral ground motion should be input when isolated structures are analyzed. Considering the complexity of high-rise isolated structures and isolation bearings system,the study on a high-rise isolated structure in Xichang( seismic fortification intensity 9) was conducted. Seven groups of earthquake ground motions were selected,and the seismic responses( acceleration,displacement,stress of isolators) of the structure were compared when the structure is subjected to unilateral and bilateral ground motion excitations. It is found that the tensile and the compressive stress of the corner isolators exceed the code limitations under bilateral ground motion inputs while they don't exceed the limitation under unilateral inputs,and some solutions are proposed to solve the problem. When isolated buildings,especially high-rise isolated buildings are analyzed,bilateral ground motions are suggested to be input,and more efforts should be made on the study of tensile-resistant isolators.
In the Code for Seismic Design of Buildings in China,there are no specifications that unilateral or bilateral ground motion should be input when isolated structures are analyzed. Considering the complexity of high-rise isolated structures and isolation bearings system,the study on a high-rise isolated structure in Xichang( seismic fortification intensity 9) was conducted. Seven groups of earthquake ground motions were selected,and the seismic responses( acceleration,displacement,stress of isolators) of the structure were compared when the structure is subjected to unilateral and bilateral ground motion excitations. It is found that the tensile and the compressive stress of the corner isolators exceed the code limitations under bilateral ground motion inputs while they don't exceed the limitation under unilateral inputs,and some solutions are proposed to solve the problem. When isolated buildings,especially high-rise isolated buildings are analyzed,bilateral ground motions are suggested to be input,and more efforts should be made on the study of tensile-resistant isolators.
引文
[1]Martelli A,Forni M,Clemente P.Recent worldwide application of seismic isolation and energy dissipation and conditions for their correct use[C]∥The 15thWorld Conference on Earthquake Engineering,2012.
[2]朱宏平,周方圆,袁涌.建筑隔震结构研究进展与分析[C]∥第22届全国结构工程学术会议论文集第Ⅰ册,2013.ZHU Hongping,ZHOU Fangyuan,YUAN Yong.Development and analysis of the research on the base isolated structures[C]∥The 22ndNational Structural Engineering Conference Proceedings,VolumeⅠ,2013.(in Chinese)
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[5]吴任鹏,王曙光,刘伟庆,等.考虑橡胶支座拉压刚度不同取值对隔震效果的影响研究[J].工程抗震与加固改造,2008,30(5):24-28.WU Renpeng,WANG Shuguang,LIU Weiqing,et al.Research on influence of difference between pulling and pushing stiffness of RB&LRB upon the Isolation Effectiveness[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):24-28.(in Chinese)
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[7]周颖,洪磊.地震动选取方法对超高层结构抗震性能的影响[J].地震工程与工程振动,2013,33(2):60-67.ZHOU Ying,HONG Lei.The effect of ground motion selections on seismic performance of a super-tall structure[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(2):60-67.(in Chinese)
[8]JGJ 3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.JGJ 3-2010 Technical Specification for Concrete Structures of Tall Building[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[9]程华群,刘伟庆,王曙光.高层隔震建筑设计中隔震支座受拉问题分析[J].地震工程与工程振动,2007,27(4):161-166.CHENG Huaqun,LIU Weiqing,WANG Shuguang.Analysis of the tension of rubber bearings in the design of isolated high-rise buildings[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(4):161-166.(in Chinese)
[10]周云,邓雪松,邹征敏,等.一种复合抗拉叠层橡胶隔震支座[P].中国:101709594B,2010-05-19.ZHOU Yun,DENG Xuesong,ZOU Zhengmin,et al.A composite tensile laminated rubber bearings[P].CN:101709594 B,2010-05-19.(in Chinese)
[11]颜学渊,张永山,王焕定,等.高层结构三维基础隔震抗倾覆试验研究[J].建筑结构学报,2009,30(4):1-8.YAN Xueyuan,ZHANG Yongshan,WANG Huanding,et al.Experimental study on high-rise structure with three-dimensional base isolation and overturn resistance devices[J].Journal of Building Structures,2009,30(4):1-8.(in Chinese)
[12]祁皑,林云腾.添加钢筋提高隔震结构高宽比限值的研究[J].地震工程与工程振动,2005,25(1):120-125.QI Ai,LIN Yunteng.Research on the approaches to increase the height-width ratio with supplemental steel bar[J].Journal of Earthquake Engineering and Engineering Vibration,2005,25(1):120-125.(in Chinese)
[13]刘海卿,李忠献.应用形状记忆合金-橡胶复合支座的结构隔震[J].自然灾害学报,2006,15(3):123-127.LIU Haiqing,LI Zhongxian.Application of SMA-rubber bearing to structural seismic isolation[J].Journal of Natural Disasters,2006,15(3):123-127.(in Chinese)
[14]Kashiwazaki A,Shimada T,Fujikawa T,et al.Study on 3-dimensional base isolation system applying to new type power plant reactor(hydraulic 3-dimensional base isolation system:no.1)[C]∥Transactions of the 17thInternational Conference on Structural Mechanics in Reactor Technology Prague,Czech Republic,2003.
[15]Ogiso S,Nakamura K,Suzuki M,et al.Development of 3D seismic isolator using metallic bellows[C]∥Transactions of the 17thInternational Conference on Structural Mechanics in Reactor Technology Prague,Czech Republic,2003.
[16]Suhara J,Tamura T,Ohta K,et al.Research on 3-D base isolation system applied to new power reactor 3-D seismic isolation device with rolling seal type air spring:Part 1[C]∥Transactions of the 17thInternational Conference on Structural Mechanics in Reactor Technology Prague,Czech Republic,2003.
[17]Wilde K,Gardoni P,Fujino Y.Base isolation system with shape memory alloy device for elevated highway bridges[J].Engineering Structures,2000,22(3):222-229.
[18]Bhuiyan A R,Alam M S.Seismic performance assessment of highway bridges equipped with superelastic shape memory alloy-based laminated rubber isolation bearing[J].Engineering Structures,2013,49:396-407.
[2]朱宏平,周方圆,袁涌.建筑隔震结构研究进展与分析[C]∥第22届全国结构工程学术会议论文集第Ⅰ册,2013.ZHU Hongping,ZHOU Fangyuan,YUAN Yong.Development and analysis of the research on the base isolated structures[C]∥The 22ndNational Structural Engineering Conference Proceedings,VolumeⅠ,2013.(in Chinese)
[3]周福霖,崔鸿超,安部重孝(日),等.东日本大地震灾害考察报告[J].建筑结构,2012,42(4):1-20.ZHOU Fulin,CUI Hongchao,Shigetaka ABE,et al.Inspection report of the disaster of the east japan earthquake by sino-japanese joint mission[J].Structure Engineering,2012,42(4):1-20.(in Chinese)
[4]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[5]吴任鹏,王曙光,刘伟庆,等.考虑橡胶支座拉压刚度不同取值对隔震效果的影响研究[J].工程抗震与加固改造,2008,30(5):24-28.WU Renpeng,WANG Shuguang,LIU Weiqing,et al.Research on influence of difference between pulling and pushing stiffness of RB&LRB upon the Isolation Effectiveness[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):24-28.(in Chinese)
[6]西昌盛世建昌酒店隔震分析报告[R].上海:中船第九设计研究院工程有限公司,2013.Isolation analysis report of Shengshijianchang hotel in xichang[R].Shanghai:China Shipbuilding NDRI Engineering Co.,Ltd,2013.(in Chinese)
[7]周颖,洪磊.地震动选取方法对超高层结构抗震性能的影响[J].地震工程与工程振动,2013,33(2):60-67.ZHOU Ying,HONG Lei.The effect of ground motion selections on seismic performance of a super-tall structure[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(2):60-67.(in Chinese)
[8]JGJ 3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.JGJ 3-2010 Technical Specification for Concrete Structures of Tall Building[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[9]程华群,刘伟庆,王曙光.高层隔震建筑设计中隔震支座受拉问题分析[J].地震工程与工程振动,2007,27(4):161-166.CHENG Huaqun,LIU Weiqing,WANG Shuguang.Analysis of the tension of rubber bearings in the design of isolated high-rise buildings[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(4):161-166.(in Chinese)
[10]周云,邓雪松,邹征敏,等.一种复合抗拉叠层橡胶隔震支座[P].中国:101709594B,2010-05-19.ZHOU Yun,DENG Xuesong,ZOU Zhengmin,et al.A composite tensile laminated rubber bearings[P].CN:101709594 B,2010-05-19.(in Chinese)
[11]颜学渊,张永山,王焕定,等.高层结构三维基础隔震抗倾覆试验研究[J].建筑结构学报,2009,30(4):1-8.YAN Xueyuan,ZHANG Yongshan,WANG Huanding,et al.Experimental study on high-rise structure with three-dimensional base isolation and overturn resistance devices[J].Journal of Building Structures,2009,30(4):1-8.(in Chinese)
[12]祁皑,林云腾.添加钢筋提高隔震结构高宽比限值的研究[J].地震工程与工程振动,2005,25(1):120-125.QI Ai,LIN Yunteng.Research on the approaches to increase the height-width ratio with supplemental steel bar[J].Journal of Earthquake Engineering and Engineering Vibration,2005,25(1):120-125.(in Chinese)
[13]刘海卿,李忠献.应用形状记忆合金-橡胶复合支座的结构隔震[J].自然灾害学报,2006,15(3):123-127.LIU Haiqing,LI Zhongxian.Application of SMA-rubber bearing to structural seismic isolation[J].Journal of Natural Disasters,2006,15(3):123-127.(in Chinese)
[14]Kashiwazaki A,Shimada T,Fujikawa T,et al.Study on 3-dimensional base isolation system applying to new type power plant reactor(hydraulic 3-dimensional base isolation system:no.1)[C]∥Transactions of the 17thInternational Conference on Structural Mechanics in Reactor Technology Prague,Czech Republic,2003.
[15]Ogiso S,Nakamura K,Suzuki M,et al.Development of 3D seismic isolator using metallic bellows[C]∥Transactions of the 17thInternational Conference on Structural Mechanics in Reactor Technology Prague,Czech Republic,2003.
[16]Suhara J,Tamura T,Ohta K,et al.Research on 3-D base isolation system applied to new power reactor 3-D seismic isolation device with rolling seal type air spring:Part 1[C]∥Transactions of the 17thInternational Conference on Structural Mechanics in Reactor Technology Prague,Czech Republic,2003.
[17]Wilde K,Gardoni P,Fujino Y.Base isolation system with shape memory alloy device for elevated highway bridges[J].Engineering Structures,2000,22(3):222-229.
[18]Bhuiyan A R,Alam M S.Seismic performance assessment of highway bridges equipped with superelastic shape memory alloy-based laminated rubber isolation bearing[J].Engineering Structures,2013,49:396-407.
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