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首页> 外文期刊>Journal of Earthquake Engineering >SEISMIC HAZARD ASSESSMENT OF UNITED ARAB EMIRATES AND ITS SURROUNDINGS
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SEISMIC HAZARD ASSESSMENT OF UNITED ARAB EMIRATES AND ITS SURROUNDINGS

机译：阿拉伯联合酋长国的地震危险性评估及其周围环境

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摘要

This paper presents the seismic hazard assessment and seismic zoning of the United Arab Emirates (UAE) and its surroundings based on the probabilistic approach. The area that has been studied lies between 50°E—60°E and 20°N-30°N and spans several Gulf countries. First, the tectonics of the area and its surroundings is reviewed. An updated catalogue, containing both historical and instrumental events is used. Seismic source regions are modelled and relationships between earthquake magnitude and earthquake frequency is established. A modified attenuation relation for Zagros region is adopted. Seismic hazard assessment is then carried out for 20 km interval grid points. Seismic hazard maps of the studied area based on probable Peak Ground Acceleration (PGA) for 10% probability of exceedance for time-spans of 50, 100 and 200 years are shown. A seismic zone map is also shown for a 475-year return period. Although the results of the seismic hazard assessment indicated that UAE has moderate to low seismic hazard levels, nevertheless high seismic activities in the northern part of UAE warrant attention. The northern Emirates region is the most seismically active part of UAE. The PGA on bedrock in this region ranges between 0.22 g for a return period of 475 years to 0.38 g for a return period of 1900 years. This magnitude of PGA, together with amplification from local site effect, can cause structural damage to key structures and lifeline systems.
机译：本文介绍了基于概率方法的阿联酋及其周边地区的地震危险性评估和地震分区。研究区域位于50°E—60°E和20°N-30°N之间，横跨几个海湾国家。首先，回顾该地区及其周围地区的构造。使用了包含历史事件和工具事件的更新目录。对震源区域进行了建模，并建立了地震震级与地震频率之间的关系。采用修正的Zagros区域衰减关系。然后对间隔20 km的网格点进行地震危险性评估。显示了基于可能的峰值地面加速度（PGA），在50、100和200年的时间跨度中超过10％概率的研究区域的地震灾害图。还显示了一个475年回归期的地震带图。尽管地震危险性评估的结果表明，阿联酋的地震危险程度为中度到低度，但是阿联酋北部地区的高地震活动值得关注。阿联酋北部地区是阿联酋地震活动最活跃的地区。该区域基岩上的PGA在475年的回收期为0.22 g至1900年的回收期为0.38 g之间。这种PGA的数量，加上局部效应的放大，可能会对关键结构和生命线系统造成结构损坏。

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