This paper focuses on the exposure and fragility/vulnerability of the residential, mixed residential/commercial, and public building stock of the city of Isfahan, in Central Iran, and constitutes the first part of a seismic risk assessment study for that city. To determine the assets at risk, we first summarize the details of the building stock and population from the available georeferenced 2011 Census data. From this dataset and from a local survey of the city, we categorize the building taxonomy in 27 construction classes characterized by age, height, and material/lateral-load-resisting system. A building exposure model is then assembled by first dividing Isfahan in city blocks and then by assigning the appropriate statistical properties to the buildings, such as construction class, built area, and replacement cost. The population of each city block is also estimated and accounted for. To assess the fragility and vulnerability to earthquake ground motion, for each building class we performed nonlinear dynamic analysis of multiple equivalent single-degree-of-freedom systems. This process generated a set of class- and region-specific fragility and vulnerability functions that considered both record-to-record and building-to-building response variability. In the companion paper we used the exposure model and the fragility and vulnerability curves generated for all these asset classes to probabilistically assess the seismic risk of Isfahan.

本文重点关注伊朗中部伊斯法罕市的住宅，住宅/商业和公共建筑混合体的暴露程度和脆弱性/脆弱性，并构成该城市地震风险评估研究的第一部分。为了确定有风险的资产，我们首先从可用的经过地理参考的2011年人口普查数据中总结了建筑存量和人口的详细信息。从该数据集和城市的局部调查中，我们将建筑分类法分类为27个建筑类别，这些建筑类别具有年龄，身高和耐材料/侧向荷载的系统。然后通过以下方式组装建筑物暴露模型：首先将伊斯法罕（Isfahan）划分为城市街区，然后为建筑物分配适当的统计属性，例如建筑物级别，建筑面积和重置成本。每个城市街区的人口也都进行了估算和计算。为了评估地震地震动的脆弱性和易损性，我们针对每个建筑物类对多个等效的单自由度系统进行了非线性动力学分析。此过程生成了一组针对特定类别和特定地区的脆弱性和漏洞功能，这些功能考虑了记录到记录和建筑物到建筑物的响应可变性。在随附的论文中，我们使用了暴露模型以及针对所有这些资产类别生成的脆弱性和脆弱性曲线来概率性地评估伊斯法罕的地震风险。对于每个建筑物类，我们对多个等效的单自由度系统进行了非线性动力学分析。此过程生成了一组针对特定类别和特定地区的脆弱性和漏洞功能，这些功能考虑了记录到记录和建筑物到建筑物的响应可变性。在随附的论文中，我们使用了暴露模型以及针对所有这些资产类别生成的脆弱性和脆弱性曲线来概率性地评估伊斯法罕的地震风险。对于每个建筑物类，我们对多个等效的单自由度系统进行了非线性动力学分析。此过程生成了一组针对特定类别和特定地区的脆弱性和漏洞功能，这些功能考虑了记录到记录和建筑物到建筑物的响应可变性。在随附的论文中，我们使用了暴露模型以及针对所有这些资产类别生成的脆弱性和脆弱性曲线来概率性地评估伊斯法罕的地震风险。