中美规范关于地震波的选择与框架-核心筒结构弹塑性时程分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
简述了中美两国抗震设计规范中有关地震波选择的相关条文,列举了工程实践中常用的选波方法,并对选出的地震波反应谱特性进行了比较。中美两国规范中建议的选波方法均要求选择能与规范的设计反应谱相一致的地震波,不同之处为中国规范是将地震波峰值加速度调幅至规范规定值,而美国规范是将某一周期范围内地震波反应谱调幅至与设计反应谱接近,调幅后的地震波峰值加速度无明显规律。按照中美两国抗震设计规范分别设计了两栋相似框架-核心筒结构,建立了两结构的弹塑性分析模型。根据中国规范建议方法选择出7组地震波,进行弹塑性时程分析。分析结果表明:在相应于中国8度罕遇地震的多组地震波作用下,中美两国规范设计方案在地震作用初期地震响应基本一致,在后期由于结构配筋形式与配筋数量等差异,结构损伤程度不同;按中国规范设计方案的最大层间位移角为按美国规范设计方案的1.03~1.17倍,连梁最大塑性变形为按美国规范设计方案的0.67~0.98倍,剪力墙应变沿层高的分布接近,美国规范设计结构纵筋的屈服应变是中国规范设计方案的1.2倍,按中国规范设计方案的剪力墙损伤程度重于按美国规范设计的剪力墙。
Recommended criteria about earthquake ground motion selection in Chinese and American seismic design codes were introduced and typical selection methods in engineering practice were listed. The response spectrum features of ground motion selected and modified by different methods were compared. The study indicates that the methods suggested in Chinese and American codes both aim to select ground motion whose spectrum is consistent with the prescribed design response spectrum. The difference is that Chinese method scales the peak ground acceleration( APG) of a record to a prescribed value,but American method modifies the record to provide the best match to the spectral shape of the design response spectrum over a period range of interest,with irregular APG of scaled ground motions. The elasto-plastic responses of two similar frame-core wall structures designed in accordance with Chinese and American design codes respectively are studied in this paper,where seven pairs of ground motions were selected and modified by Chinese suggested methods as the input ground motion records. The elasto-plastic time history analysis results illustrate that under the rare earthquake action of 8 intensity,the seismic responses of Chinese design structure and American design structure are nearly the same in the beginning,while the damages of two structures become different on account of the reinforcement layout and amount variations in the later period; the maximum drift ratio of Chinese design project is 1. 03 ~ 1. 17 times that of American design project,the maximum plastic rotation of coupling beams of Chinese design project is 0. 67 ~ 0. 98 times that of American design project,the strain distribution along structure height of shear walls is similar,but the shear wall damage of Chinese design project is severer than that of American design project because the reinforcement yield stain of American design project is 1. 2 times that of Chinese design project.
引文
[1]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))
    [2]TBI Guidelines Working Group.Guidelines for performance-based seismic design of tall buildings[R].PEER Report 2010/05.Berkeley,CA:Pacific Earthquake Engineering Research Center,University of California,2010:53-54.
    [3]胡妤.高烈度地区钢筋混凝土框架-核心筒结构抗震性能研究[D].北京:清华大学,2014:41-83.(HU Yu.Study on seismic performance of reinforced concrete frame-core tube structures on high seismicity zones[D].Beijing:Tsinghua University,2014:41-83.(in Chinese))
    [4]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—2010Technical specification for concrete structures of tall building[S].Beijing:China Architecture&Building Press,2010.(in Chinese))
    [5]ASCE 7-10 Minimum design loads for buildings and other structures[S].Reston,VA:American Society of Civil Engineers/Structural Engineering Institute,2010.
    [6]杨溥,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,33(6):33-37.(YANG Pu,LAI Ming.A new method for selecting inputting waves for time-history analysis[J].China Civil Engineering Journal,2000,33(6):33-37.(in Chinese))
    [7]Pacific Earthquake Engineering Research Center.Technical report for the PEER ground motion database web application[EB/OL].2010-10-01.http://peer_berkeley_ground_motion_database/Technical.Report.pdf.
    [8]ATC-63 Quantification of building seismic performance factors[S].Redwood City,CA:Applied Technology Council,2008.
    [9]曲哲,叶列平,潘鹏.建筑结构弹塑性时程分析中地震动记录选取方法的比较研究[J].土木工程学报,2011,44(7):10-21.(QU Zhe,YE Lieping,PAN Peng.Comparative study on methods of selecting earthquake ground motions for nonlinear time history analyses of building structures[J].China Civil Engineering Journal,2011,44(7):10-21.(in Chinese))
    [10]Lu Xinzheng,Lu Xiao,Ye Lieping,et al.An improved ground motion intensity measure for super high-rise buildings[J].Science China:Technological Sciences,2013,56(6):1525-1533.
    [11]胡妤,赵作周,钱稼茹.高烈度地区框架-核心筒结构中美抗震设计方法对比[J].建筑结构学报,2015,36(2):1-9.(HU Yu,ZHAO Zuozhou,QIAN Jiaru.Comparison of Chinese and American seismic design methods for frame-core wall structures in high seismic zone[J].Journal of Building Structures,2015,36(2):1-9.(in Chinese))
    [12]Computer and Structures.Perform 3D nonlinear analysis and performance assessment for 3D structures user guide[M].Berkeley,CA:Computer and Structures,2006:55-106.
    [13]赵作周,张石昂,贺小岗,钱稼茹.箍筋约束高强混凝土受压应力-应变本构关系[J].建筑结构学报,2014,35(5):96-103.(ZHAO Zuozhou,ZHANG Shiang,HE Xiaogang,QIAN Jiaru.Stress-strain relationship of stirrup-confined high-strength concrete[J].Journal of Buiding Structures,2014,35(5):96-103.(in Chinese))
    [14]中国建筑标准设计研究院.全国民用建筑工程设计技术措施:结构(混凝土结构)[M].北京:中国计划出版社,2009:175-176.(China Institute of Building Standard Design&Research.National technical measures for design of civil construction:structure[M].Beijing:China Planning Press,2009:175-176.(in Chinese))
    [15]清华大学.房层建筑防倒塌设计规程(送审稿)[R].北京:清华大学土木工程系,2014.(Tsinghua University.Specification for collapse protection design of buildings(for approval)[S].Beijing:Department of Civil Engineering,Tsinghua University,2014.(in Chinese))

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心