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首页> 外文期刊>The Open Civil Engineering Journal >Comparing Ground Motion Intensity, Root Mean Square of Accelerationand Time Duration from Four Definitions of Strong Motion
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Comparing Ground Motion Intensity, Root Mean Square of Accelerationand Time Duration from Four Definitions of Strong Motion

机译：从强运动的四个定义比较地震动强度，加速度均方根和持续时间

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Variation of strong motion intensity, root mean square of ground acceleration and time-duration in seconds obtainedfrom 83 accelerograms of 18 earthquakes with magnitudes between 5 to 7.7 were investigated considering fourdefinitions of strong section of accelerograms given by Vanmarcke-Lai; Bolt, Trifunac-Brady and McCaan-Shah. Strongmotion intensities were calculated for all definitions of strong duration. Even though, durations in seconds and root meansquare of ground acceleration values resulted quite different among the four definitions of strong sections, both durationsin seconds and root mean square of acceleration squared values tend to compensate each other to yield the same strongmotion intensity for each definition used. Q-ratio as defined by Vanmarcke-Lai (Peak Ground Acceleration divided byroot mean square of acceleration) was found not constant but instead it varied significantly for all strong motion definitions.Similarly, ratio of strong motion intensity over peak ground acceleration squared as defined by Vanmarcke-Laiholds linear for time durations less than 20-30 seconds for all definitions, afterwards it shows large dispersion. Finally,Vanmarcke-Lai time duration in seconds appears to increase from near field distance up to a certain medium distance afterwhich it starts to decrease.
机译：根据Vanmarcke-Lai给出的4个强加速度段的定义，研究了从18次地震的83次加速度图得到的强运动强度，地面加速度的均方根和以秒为单位的持续时间的变化，震级在5至7.7之间。博尔特，特里菲纳克·布雷迪和麦凯恩·沙阿。针对强持续时间的所有定义计算了强运动强度。即使以秒为单位的持续时间和地面加速度值的均方根得出的结果在强截面的四个定义中有很大不同，以秒为单位的持续时间和加速度平方值的均方根也倾向于相互补偿，以使所使用的每个定义产生相同的强运动强度。发现Vanmarcke-Lai（峰值地面加速度除以加速度的均方根）定义的Q值比率不是恒定的，而是在所有强运动定义中均显着变化。类似地，强运动强度与峰值地面加速度之比的平方由对于所有定义，Vanmarcke-Laihold持续时间少于20-30秒都是线性的，此后它显示出较大的分散性。最后，以秒为单位的Vanmarcke-Lai持续时间似乎从近场距离增加到一定的中间距离，然后开始减小。

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