| 地震动瞬时能量谱与结构位移响应关系研究 |
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| 引用本文： | 刘强,周瑞忠,刘宇航.地震动瞬时能量谱与结构位移响应关系研究[J].地震工程与工程振动,2009,29(5). |
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| 作者姓名： | 刘强 周瑞忠 刘宇航 |
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| 作者单位： | 1. 福州大学,土木工程学院,福建,福州,350001;集美大学,工程技术学院,福建,厦门,361021
2. 福州大学,土木工程学院,福建,福州,350001 |
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| 基金项目： | 福建省自然科学基金项目，福建建设厅科技项目，福建教育厅科技项目 |
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| 摘 要： | 本文通过HHT变换得到瞬时能量谱,并以HHT对地震动作用下的结构位移响应进行分析,发现长周期结构动力响应的显著特点:最大结构位移响应总是滞后于地震动激励的最大能量谱值时间.滞后的时间主要取决于结构的动力特性参数(特别是自振周期),也与地震动的类型有关.仿真计算的结果表明:长周期结构的破环与倒塌并不发生在地震动强度最大的时刻,而多数是在地震动末期,甚至在地震动完全消失之后.有益的结论为结构控制设计与安全提供科学依据.
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| 关 键 词： | Hilbert-Huang变换 位移响应 长周期结构 位移滞后 |
Research on relation between instantaneous energy spectrum of earthquake ground motion and displacement response of structures |
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| LIU Qiang,ZHOU Ruizhong,LIU Yuhang.Research on relation between instantaneous energy spectrum of earthquake ground motion and displacement response of structures[J].Earthquake Engineering and Engineering Vibration,2009,29(5). |
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| Authors: | LIU Qiang ZHOU Ruizhong LIU Yuhang |
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| Institution: | LIU Qiang1,2,ZHOU Ruizhong1,LIU Yuhang1(1.College of Civil Engineering,Fuzhou University,Fuzhou 350001,China,2.College of Engineering Technology,Jimei University,Xiamen 361021,China) |
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| Abstract: | Instantaneous energy spectrum is obtained by the HHT transform to analyze structure's displacement responses.Notable characteristics of long-period structure are found: The instant of maximal displacement response of structure is later than the instant of maximal peak value of earthquake energy.Structural dynamic characteristic parameters(especially free vibrafion frequency) and earthquake style play an important role in determining the energy peak value appearing instant.The simulation results also indicat... |
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| Keywords: | Hilbert-Huang transform displacement response long period structure displacement delay |
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