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首页> 外文期刊>Journal of Earthquake Engineering >SEISMIC HAZARD ASSESSMENT OF THE HISTORICAL SITE OF JAM IN AFGHANISTAN AND STABILITY ANALYSIS OF THE MINARET
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SEISMIC HAZARD ASSESSMENT OF THE HISTORICAL SITE OF JAM IN AFGHANISTAN AND STABILITY ANALYSIS OF THE MINARET

机译：阿富汗卡姆历史遗址的地震危险性评估和小支墩的稳定性分析

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摘要

The Minaret of Jam in Afghanistan was recently included in UNESCO's List of World's Endangered Monuments. The minaret is the world's second tallest (～60 m) after the Qutub Minar in New Delhi and it is also one of the oldest (～800 years). It is situated at the centre of the Hindukush range in the Ghor Province at the junction of Rivers Hari-Rud and Jam-Rud, at an elevation of 1900 m. The Minaret of Jam is in danger of collapse due to a 3.4° northward inclination inducing high stresses in its deteriorated brick masonry. The precarious conditions of the monument render it highly vulnerable to earthquakes. Therefore prior to any intervention to protect it, an assessment of the seismic hazard at the site, followed by an evaluation of the tower's seismic vulnerability, is of foremost importance. This article illustrates the results of the seismic hazard assessment of the archaeological site of Jam using both the probabilistic explanation (PSHA) and the deterministic explanation (DSHA) approaches. Uncertainty in PSHA has been handled within a logic-tree framework. Uniform hazard response spectra have been computed for return periods of 72, 224, 475 and 975 years. The earthquake input defined by the seismic hazard assessment of Jam has then been used to perform the dynamic analysis of the minaret. The latter has been carried out using a lumped mass approach and a 3D finite element model, accounting in both cases for dynamic soil-structure interaction.
机译：阿富汗的贾姆宣礼塔最近被联合国教科文组织列为世界濒危古迹。宣礼塔是仅次于新德里的库图卜塔的世界第二高（约60 m），它也是最古老的塔（约800年）之一。它位于Ghor省Hindukush山脉的中心，在Hari-Rud和Jam-Rud河流交界处，海拔1900 m。贾姆尖塔由于向北倾斜3.4度，在其恶化的砖石结构中产生高应力，因此有倒塌的危险。纪念碑的不稳定状况使其非常容易受到地震的影响。因此，在进行任何保护措施之前，首先要评估现场的地震危险，然后评估塔的地震脆弱性。本文说明了使用概率解释（PSHA）和确定性解释（DSHA）方法对Jam考古遗址进行地震灾害评估的结果。 PSHA中的不确定性已在逻辑树框架中处理。已经计算出72、224、475和975年的回归期的统一危险响应谱。然后，由Jam的地震危险性评估定义的地震输入已用于执行尖塔的动态分析。后者是通过集总质量方法和3D有限元模型进行的，在这两种情况下都考虑了动态土-结构相互作用。

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