地震动选取方法对超高层结构抗震性能的影响
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摘要
我国时程分析中地震动的选取常用两种方法:规范法和最不利地震动法。为了研究不同方法对超高层结构抗震性能的影响,以某超高层结构为例,采用这两种方法分别选择地震动,用ABAQUS软件对结构进行了罕遇地震下的弹塑性时程分析,将计算得到的结构反应进行了对比分析。结果表明:最不利地震动法中台湾组地震动的结构反应最大,国外组次之,大陆组最小;台湾组和国外组地震动的结构反应比规范法地震动大很多,而大陆组的结果刚好相反。
In China,there are two main methods of choosing proper ground motion records for the time history analysis: the method specified in design codes and the most unfavorable ground motion method.To investigate the influence of the two earthquake ground-motion selection methods on the seismic performance of super-tall structures,a case of a super-tall structure is studied.The earthquake ground motions are first chosen for the structure in the two selection methods respectively,and then the elasto-plastic dynamic analysis under major earthquakes is carried out by ABAQUS program.Finally,the numerical results of the structure responses are compared.The results indicate that the responses caused by the most unfavorable ground motions in Taiwan(China) group is the largest,the foreign group takes the second place,and the China mainland group is the least.The responses caused by the ground motions in Taiwan(China) and foreign group are much greater than that of the design codes'method,while the contrary result is obtained in the China mainland group.
In China,there are two main methods of choosing proper ground motion records for the time history analysis: the method specified in design codes and the most unfavorable ground motion method.To investigate the influence of the two earthquake ground-motion selection methods on the seismic performance of super-tall structures,a case of a super-tall structure is studied.The earthquake ground motions are first chosen for the structure in the two selection methods respectively,and then the elasto-plastic dynamic analysis under major earthquakes is carried out by ABAQUS program.Finally,the numerical results of the structure responses are compared.The results indicate that the responses caused by the most unfavorable ground motions in Taiwan(China) group is the largest,the foreign group takes the second place,and the China mainland group is the least.The responses caused by the ground motions in Taiwan(China) and foreign group are much greater than that of the design codes'method,while the contrary result is obtained in the China mainland group.
引文
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[2]JGJ3-2010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,2011.JGJ3-2010 Technical Specification for Concrete Structures of Tall Building[S].Beijing:China Architecture&Building Press,2011.(in Chinese)
[3]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2011.GB50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2011.(in Chinese)
[4]翟长海,谢礼立.估计和比较地震动潜在破坏势的综合评述[J].地震工程与工程振动,2002,22(5):1-7.ZHAI Changhai,XIE Lili.A comprehensive method for estimating and comparing the damage potential of strong ground motion[J].Journal ofEarthquake Engineering and Engineering Vibration,2002,22(5):1-7.(in Chinese)
[5]Xie L L,Zhai C H.Study on the severest real ground motion for seismic design and analysis[J].Acta Seismologica Sinica,2003,16(3):260-271.
[6]Zhai C H,Xie L L.A new approach of selecting real input ground motions for seismic design:The most unfavourable real seismic design groundmotions[J].Earthquake Engineering&Structural Dynamics,2007,36(8):1009-1027.
[7]翟长海,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.ZHAI Changhai,XIE Lili.The severest design ground motions for seismic design and analysis of structures[J].China Civil Engineering Journal,2005,38(12):51-58.(in Chinese)
[8]吴晓涵,吕西林.反复荷载下混凝土剪力墙非线性有限元分析[J].同济大学学报,1996,24(2):117-123.WU Xiaohan,LU Xilin.Nonlinear finite element analysis of reinforced concrete slit shear wall under cyclic loading[J].Journal of Tongji Universi-ty,1996,24(2):117-123.(in Chinese)
[9]GB50010-2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.GB50011-2002 Code for Design of Concrete Structures[S].Beijing:China Architecture&Building Press,2002.(in Chinese)
[10]杨先桥,傅学怡,黄用军.深圳平安金融中心塔楼动力弹塑性分析[J].建筑结构学报,2011(7):40-49.YANG Xianqiao,FU Xueyi,HUANG Yongjun.Dynamic elasto-plastic analysis of the Shenzhen Ping’an Financial Center Tower[J].Journal ofBuilding Structures,2011,32(7):40-49.(in Chinese)
[11]津湾广场项目人工波及天然波研究报告[R].天津市地震工程研究所检测中心,2011.Report of the artificial waves and natural earthquake waves for Jinwan Plaza[R].Investigation Center of Tianjin Research Institute on EarthquakeEngineering,2011.(in Chinese)
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