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首页> 外文期刊>Bulletin of earthquake engineering >A simplified approach for vulnerability assessment in moderate-to-low seismic hazard regions: application to Grenoble (France)
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A simplified approach for vulnerability assessment in moderate-to-low seismic hazard regions: application to Grenoble (France)

机译：中低地震危险区域脆弱性评估的简化方法：应用于格勒诺布尔（法国）

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摘要

Due to the moderate seismic risks in France, the building vulnerability assessment methods developed for high seismic risk countries could not easily be used here because of their cost and the low-risk perception among the public and officials. A light vulnerability assessment method is proposed and tested in Grenoble (France), based on classes and scores provided in the GNDT method but simplified in terms of visual screening and number of structural parameters used. Compared to the RiskUE method, the damage obtained by our approach shows that 90% of buildings have residuals smaller than 0.2, i.e. one grade of the EMS98 damage scale. A large scale survey is devised and conducted among the inhabitants of Grenoble in order to collect the main structural parameters. By comparing the results from the survey to the historical urbanization of Grenoble and to expert surveys performed in two urban districts, the information useful for the light method of vulnerability assessment can be rapidly collected by non-experts reducing substantially the estimate cost. The average damage is then computed using the GNDT formula considering the probable intensities which could be observed in Grenoble (VII and VIII). The average damage reaches 0.4 in the oldest part of Grenoble mainly made of masonry buildings and 0.2 in reinforced concrete suburbs where reinforced concrete predominates. The results are a relative vulnerability assessment that provides useful initial information for the urban zones of Grenoble where the vulnerability is higher. This method can be used to classify the seismic vulnerability in wide seismic-prone regions to a fair degree of accuracy and at low cost.
机译：由于法国的地震风险中等，为高地震风险国家开发的建筑物易损性评估方法由于成本高昂，而且公众和官员对风险的认知度较低，因此在这里不易使用。根据GNDT方法中提供的类别和评分，在格勒诺布尔（法国）提出并测试了一种轻度脆弱性评估方法，但在视觉筛选和使用的结构参数数量方面进行了简化。与RiskUE方法相比，通过我们的方法获得的损坏表明90％的建筑物的残差小于0.2，即EMS98损坏等级的一级。为了收集主要的结构参数，对格勒诺布尔的居民进行了大规模调查。通过将调查的结果与格勒诺布尔的历史城市化以及在两个市区进行的专家调查相比较，非专家可以迅速收集对轻度脆弱性评估有用的信息，从而大大降低了估计成本。然后考虑到在格勒诺布尔（VII和VIII）中可能观察到的强度，使用GNDT公式计算平均损伤。在格勒诺布尔最古老的部分（主要是砖石建筑）中，平均损坏达到0.4，而在以钢筋混凝土为主的钢筋混凝土郊区，平均损坏达到0.2。结果是相对脆弱性评估，可为脆弱性较高的格勒诺布尔市区提供有用的初始信息。该方法可用于在地震多发地区对地震脆弱性进行分类，以相当的准确度和低成本进行。

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