| 对若干地震动包线函数的比较分析 |
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| 引用本文： | 周锡元,杨俊卫,闫维明.对若干地震动包线函数的比较分析[J].世界地震工程,2006,22(3):1-9. |
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| 作者姓名： | 周锡元 杨俊卫 闫维明 |
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| 作者单位： | 北京工业大学,地震工程与结构诊治北京市重点试验室,北京,100022 |
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| 摘 要： | 对已经提出的四种经常使用的包线函数模型进行了评价,认为对于评价单峰点包线函数,除了要求形式简单以外,其优劣可以用函数对峰点位置和高峰隆起程度的控制能力作为标准。借助结构动力试验中阻尼比的确定方法,提出用平稳度指数来评价单峰点包线函数平缓程度。据此对四种包线函数的平稳度进行了分析,还对某些包线函数提出了一些改进。通过分析指出如果把“金井清谱”和“Penzien谱”等模型,看作是时间域中包线,这两个模型的调节能力都很强,而且比较方便,其中“Penzien谱”模型可以用来表示具有两个峰点的包线。文中的比较分析结果可以用于地震动包线函数选择和模拟。
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| 关 键 词： | 包络函数 调节能力 平稳度 |
| 文章编号： | 1007-6069(2006)03-0001-09 |
| 收稿时间： | 2005-12-17 |
| 修稿时间： | 2006-06-23 |
Comparative analyses for several envelope fuctions of earthquake ground motion |
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| ZHOU Xi-yuan,YANG Jun-wei,YAN Wei-ming.Comparative analyses for several envelope fuctions of earthquake ground motion[J].World Information On Earthquake Engineering,2006,22(3):1-9. |
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| Authors: | ZHOU Xi-yuan YANG Jun-wei YAN Wei-ming |
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| Institution: | Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | The evaluation has been made for normally used four envelope functions of earthquake ground motion.Being as evaluation standard of the envelope function this paper point out that the controlling capability of the parameters involved in functions to the peak position of the envelope with single peak and the shape of the envelope are essential besides simplicity of the formula of envelope function.With the aid of the method for determining damping ratio in structural dynamic experiment the so called stationarity index is used to estimate the gentleness of the peak's slope.By means of this index this paper analyzes the gentleness of the peak's slope for the four normally used envelope functions and some of them have been modified.It is also pointed out that if Kanai power spectrum and Penzien power spectrum are regarded as envelope function in time domain,these models are powerful and easy from viewpoint on controlling envelope shape ability.Penzien power spectrum is even able to describe the envelope with two peaks like camel.The results of comparative analyses in this paper can be used to select and simulate earthquake ground motion envelopes. |
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| Keywords: | envelope functions controlling ability gentleness |
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