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Earthquake vulnerability of school buildings: Probabilistic structural fragility analyses

机译：学校建筑的地震易损性：概率结构易损性分析

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The study presents probabilistic structural fragility assessment of public school buildings in Istanbul, which were constructed based on a standardized/typical project. The typical structure is a four-story, reinforced concrete shear wall building with moment resisting frames. Derivation of fragility functions rely on nonlinear dynamic analyses through Monte Carlo simulations. Nonlinear dynamic analyses are initially performed for a fully deterministic structural model based on the blueprints of the typical school building project. Uncertainties are introduced in different analysis cases following a modified version of the algorithm presented in Smyth et al. (2004) [21 1, which considers the effect of the random distribution of the parameters using a Monte Carlo approach. Aleatory uncertainties concerning material properties (i.e. compressive strength of concrete, yield strength of reinforcing steel and concrete density), geometrical characteristics (i.e. span lengths and story heights) and cross sectional dimensions of beams, columns and shear walls as well as epistemic uncertainty in the direction of ground motion excitation are considered. Statistical distributions for the parameters considered are obtained from in-situ measurements and material sampling tests. Fragility functions are produced in terms of peak ground acceleration and velocity as well as of the elastic spectral displacement at the first vibration period of the building. Mean damage ratios are calculated from the derived fragility functions. They are further compared to mean damage ratios calculated for similar building typologies provided in HAZUS-MH technical manual and in Istanbul building inventory. (C) 2014 Elsevier Ltd. All rights reserved.
机译：该研究提出了伊斯坦布尔的一所公立学校建筑的概率结构脆弱性评估，这些建筑是基于一个标准/典型项目建造的。典型的结构是带有抗弯框架的四层钢筋混凝土剪力墙建筑。脆弱性函数的推导依赖于通过蒙特卡洛模拟进行的非线性动力学分析。非线性动力学分析最初是基于典型教学建筑项目的蓝图为完全确定的结构模型执行的。在Smyth等人提出的算法的修改版本之后，在不同的分析案例中引入了不确定性。 （2004）[21 1，它考虑了使用蒙特卡洛方法的参数的随机分布的影响。与材料特性（即混凝土的抗压强度，钢筋的屈服强度和混凝土密度），几何特性（即跨度长度和层高）以及横梁，柱和剪力墙的横截面尺寸以及模型中的认知不确定性有关的不确定性考虑地震动激励的方向。所考虑参数的统计分布是从现场测量和材料采样测试获得的。易碎性函数是根据建筑物的第一振动周期的峰值地面加速度和速度以及弹性频谱位移产生的。根据得出的脆弱性函数计算平均损坏率。将它们与HAZUS-MH技术手册和伊斯坦布尔建筑物清单中提供的针对类似建筑物类型的平均损坏率进行了比较。 （C）2014 Elsevier Ltd.保留所有权利。

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