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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >A ground motion prediction equation for JMA instrumental seismic intensity for shallow crustal earthquakes in active tectonic regimes
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A ground motion prediction equation for JMA instrumental seismic intensity for shallow crustal earthquakes in active tectonic regimes

机译：活动构造条件下浅地壳JMA仪器地震烈度的地震动预测方程

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The JMA (Japan Meteorological Agency) seismic intensity scale has been used in Japan as a measure of earthquake ground shaking effects since 1949. It has traditionally been assessed after an earthquake based on the judgment of JMA officials. In 1996 the scale was revised as an instrumental seismic intensity measure (I_(JMA)) that could be used to rapidly assess the expected damage after an earthquake without having to conduct a survey. Since its revision, Japanese researchers have developed several ground motion prediction equations (GMPEs) for I_(JMA) using Japanese ground motion data. In this paper, we develop a new empirical GMPE for I_(JMA) based on the strong motion database and functional forms used to develop similar GMPEs for peak response parameters as part of the PEER (Pacific Earthquake Engineering Research Center) Next Generation Attenuation (NGA) project. We consider this relationship to be valid for shallow crustal earthquakes in active tectonic regimes for moment magnitudes (M) ranging from 5.0 up to 7.5-8.5 (depending on fault mechanism) and rupture distances ranging from 0 to 200 km. A comparison of this GMPE with relationships developed by Japanese researchers for crustal and shallow subduction earthquakes shows relatively good agreement among all of the relationships at M 7.0 but relatively poor agreement at small magnitudes. Our GMPE predicts the highest intensities at small magnitudes, which together with research on other ground motion parameters, indicates that it provides conservative or upwardly biased estimates of I_(JMA) for M<5.5.
机译：自1949年以来，日本就一直使用JMA（日本气象厅）地震烈度量表作为地震地震动影响的量度。传统上，它是在地震后根据JMA官员的判断进行评估的。在1996年，该量表被修订为一种仪器地震烈度测量值（I_（JMA）），可用于快速评估地震后的预期破坏，而无需进行调查。自修订以来，日本研究人员使用日本的地面运动数据为I_（JMA）开发了几个地面运动预测方程（GMPE）。在本文中，我们基于强运动数据库和功能形式开发了一种新的I_（JMA）经验GMPE，作为PEER（太平洋地震工程研究中心）下一代衰减（NGA）的一部分，用于开发用于峰值响应参数的类似GMPE。 ）项目。我们认为这种关系对于活动构造条件下的浅地壳地震是有效的，其矩震级（M）范围为5.0至7.5-8.5（取决于断层机制），破裂距离范围为0至200 km。将该GMPE与日本研究人员针对地壳和浅层俯冲地震开发的关系进行比较后，发现在M 7.0时，所有关系之间的一致性都比较好，但在小幅度范围内则相对差。我们的GMPE预测了小范围内的最高强度，再加上对其他地面运动参数的研究，表明它为M <5.5提供了I_（JMA）的保守估计或向上偏差估计。

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