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以结构反应均值估计为目标的时程分析输入地震波选择研究

张锐 王东升 孙治国 李宏男 刘文锋

张锐, 王东升, 孙治国, 李宏男, 刘文锋. 以结构反应均值估计为目标的时程分析输入地震波选择研究[J]. 工程力学, 2022, 39(12): 74-86. doi: 10.6052/j.issn.1000-4750.2021.07.0521
引用本文: 张锐, 王东升, 孙治国, 李宏男, 刘文锋. 以结构反应均值估计为目标的时程分析输入地震波选择研究[J]. 工程力学, 2022, 39(12): 74-86. doi: 10.6052/j.issn.1000-4750.2021.07.0521
ZHANG Rui, WANG Dong-sheng, SUN Zhi-guo, LI Hong-nan, LIU Wen-feng. SELECTION AND SCALING OF GROUND MOTIONS IN TIME-HISTORY ANALYSIS FOR ESTIMATES OF MEAN STRUCTURAL RESPONSES[J]. Engineering Mechanics, 2022, 39(12): 74-86. doi: 10.6052/j.issn.1000-4750.2021.07.0521
Citation: ZHANG Rui, WANG Dong-sheng, SUN Zhi-guo, LI Hong-nan, LIU Wen-feng. SELECTION AND SCALING OF GROUND MOTIONS IN TIME-HISTORY ANALYSIS FOR ESTIMATES OF MEAN STRUCTURAL RESPONSES[J]. Engineering Mechanics, 2022, 39(12): 74-86. doi: 10.6052/j.issn.1000-4750.2021.07.0521

以结构反应均值估计为目标的时程分析输入地震波选择研究

doi: 10.6052/j.issn.1000-4750.2021.07.0521
基金项目: 河北省自然科学基金项目(E2020202038);中国地震局工程力学研究所基本科研业务费专项项目(2020D28);辽宁省教育厅自然科学研究项目(LJKZ0504)
详细信息
    作者简介:

    张 锐(1978−),女,辽宁铁岭人,副教授,博士,主要从事结构抗震和防灾减灾研究(E-mail: zhangrui@djtu.edu.cn)

    孙治国(1980−),男,山东德州人,副研究员,博士,主要从事结构工程抗震研究(E-mail: sunzhiguo@cidp.edu.cn)

    李宏男(1957−),男,辽宁沈阳人,教授,博士,长江学者特聘教授,主要从事结构工程抗震研究(E-mail: hnli@dlut.edu.cn)

    刘文锋(1966−),男,山东青岛人,教授,博士,主要从事结构抗震与结构安全研究(E-mail: lwf6688@sohu.com)

    通讯作者:

    王东升(1974−),男,内蒙古库伦旗人,教授,博士,博导,主要从事结构抗震和防灾减灾研究(E-mail: dswang@hebut.edu.cn)

  • 中图分类号: TU311.3;P315.9

SELECTION AND SCALING OF GROUND MOTIONS IN TIME-HISTORY ANALYSIS FOR ESTIMATES OF MEAN STRUCTURAL RESPONSES

  • 摘要: 地震动输入是导致结构时程分析结果不确定性的最重要的影响因素,如何选择地震波实现对结构反应的“准确、有效、一致”估计是时程分析中的一项重要任务。该文对以结构反应均值估计为目标的时程分析选波问题,基于目标谱法进行了系统深入的研究。针对谱匹配,引入具有明确物理含义的权重系数,对提出的可考虑多振型影响的双指标多频段工程经验选波法和理论更加完备的最小二乘加权调幅选波法,进行了详尽的算例分析。研究表明,双指标多频段经验法可满足现有规范要求。通过与国内学者、人工波方法和NGA-West2强震数据库选波模块的比较,论证了加权调幅法在估计结构反应均值方面具有可靠的准确性,并具有广泛的适用性,也包括减隔震结构。通过比较研究也进一步明确了加权调幅法的优势在于可明显降低结构反应的离散性,更适于长周期结构的弹塑性时程分析。针对目标谱选择,提出以Newmark三联谱作为目标谱的选波方法,拟解决长周期及超长周期结构的选波问题。
  • 图  1  地震波选择是联系地震动输入和结构反应的桥梁

    Figure  1.  Ground motions selection is a bridge between records input and structural responses

    图  2  25层框架-剪力墙结构标准层平面图

    Figure  2.  Standard floor plan of 25-story frame-shear wall structure

    图  3  30层框架-剪力墙结构标准层平面图

    Figure  3.  Standard floor plan of 30-story frame-shear wall structure

    图  4  所选3条波均值与IDA均值比较

    Figure  4.  Comparison of the mean values between IDA and the three records selected by the developed method

    图  5  15层框架-剪力墙结构标准层平面图

    Figure  5.  Standard floor plan of a 15-story frame-shear wall structure

    图  6  44层框架-核心筒结构标准层平面图

    Figure  6.  Standard floor plan of a 44-story frame-core tube structure

    图  7  加权与等权方法基于两种目标谱时最大层间位移角均值

    Figure  7.  The mean of peak inter-story drift ratios by the weighted and unweighted scaling methods using two target spectra

    图  8  加权与等权方法基于两种目标谱时最大层间位移角COV

    Figure  8.  The COVs of peak inter-story drift ratios by the weighted and unweighted scaling methods using two target spectra

    图  9  调幅后人工波与目标谱的匹配(TCU042-W为例)

    Figure  9.  Spectral matching between the scaled artificial wave and target spectrum

    图  10  天然波与人工波方法所得最大层间位移角均值

    Figure  10.  The mean of peak inter-story drift ratios by the methods that apply to real earthquake records and artificial waves

    图  11  天然波与人工波方法所得最大层间位移角COV

    Figure  11.  The COVs of peak inter-story drift ratios by the methods that apply to real earthquake records and artificial waves

    图  12  各数量分组所得最大层间位移角的相对误差

    Figure  12.  The relative errors of peak inter-story drift ratios of these groups including different number records

    图  13  4层隔震结构模型与支座布置

    Figure  13.  4-story isolation structure and isolation bearing

    图  14  5层隔震结构模型与支座布置

    Figure  14.  5-story isolation structure and isolation bearing

    图  15  隔震结构最大层间位移角均值

    Figure  15.  The mean of peak inter-story drift ratios

    图  16  隔震结构最大层间位移角COV

    Figure  16.  The COVs of peak inter-story drift ratios

    图  17  隔震支座最大变形

    Figure  17.  The maximum responses of isolation bearings

    图  18  Newmark三联谱确定的目标谱(阻尼比0.02)

    Figure  18.  Target Newmark spectra at the three hazard levels, $ \xi {\text{ = }}0.02 $

    图  19  两种目标谱方法所得最大层间位移角均值

    Figure  19.  The mean of peak inter-story drift ratio demands by both target spectrum methods

    20  两种目标谱方法所得最大层间位移角COV

    20.  The COVs of peak inter-story drift ratios by both target spectrum methods

    表  1  所选3条波与反应谱结果对比

    Table  1.   Base shear of the three records and the response spectrum

    所选地震波 基底剪力/kN 相对误差/(%)
    HCH90 14035.04 −6.09
    TCU042-N 13947.40 −6.68
    YER270 12107.28 −18.99
    平均值 13813.94 −7.57
    反应谱 14945.97
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-07-10
  • 修回日期:  2021-10-12
  • 网络出版日期:  2021-10-21
  • 刊出日期:  2022-12-01

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