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首页> 外文期刊>Arabian Journal for Science and Engineering >EMPIRICAL ATTENUATION RELATIONSHIP OF PEAK GROUND ACCELERATION FOR EASTERN MARMARA REGION IN TURKEY
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EMPIRICAL ATTENUATION RELATIONSHIP OF PEAK GROUND ACCELERATION FOR EASTERN MARMARA REGION IN TURKEY

机译：土耳其东部马尔马拉地区峰值地面加速度的经验衰减关系

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摘要

A new attenuation relation for peak ground acceleration (PGA) in the Marmara region of northwestern Turkey has been developed. The data base consists of 751 horizontal components of peak ground acceleration recorded from 78 earthquakes, including the 1999 Izmit (M_w= 7.4) and the 1999 Duzce (M_w = 7.2) earthquakes. All the raw records are of the main earthquakes and their aftershocks. Baseline and instrument corrections have been applied to these raw records. Fast Fourier Transforms (FFT) have been calculated for all the records to select the high-pass and low-pass filters after these corrections. Multiple regression analyses have been used to calculate the relationship. The proposed attenuation relationship is logA = -2.7809 + 0.5344M_W -log(r_(rup) +0.0183 × l0~(0.4537M_W) ) -0.0015r_(rup) where A is the peak ground horizontal acceleration in g, M_w is the moment magnitude and r_(rup) is the closest distance from the surface projection of the rupture area. If the M_w magnitude and the fault plane solution are not defined for an event, then other magnitudes are converted to M_w magnitude using a correlation formula. The peak ground horizontal acceleration attenuation relationship has been found to be log-normally distributed with a standard error representing a 0.392 percent increase in terms of natural logarithm.
机译：在土耳其西北部的马尔马拉地区，已经开发了一种新的衰减关系，用于峰值地面加速度（PGA）。该数据库包含从78次地震中记录的751个峰值地面加速度的水平分量，其中包括1999年伊兹密特（M_w = 7.4）和1999年杜兹采（M_w = 7.2）地震。所有原始记录都是关于主要地震及其余震的。基线和仪器更正已应用于这些原始记录。经过校正后，已经为所有记录计算了快速傅立叶变换（FFT），以选择高通和低通滤波器。多元回归分析已用于计算关系。拟议的衰减关系为logA = -2.7809 + 0.5344M_W -log（r_（rup）+0.0183×l0〜（0.4537M_W））-0.0015r_（rup）其中，A是地面的峰值水平加速度，单位为g，M_w为力矩幅度和r_（rup）是距破裂区域表面投影的最近距离。如果未为事件定义M_w量级和断层平面解，则使用相关公式将其他量级转换为M_w量级。已发现峰值地面水平加速度衰减关系呈对数正态分布，标准误差表示自然对数增加0.392％。

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