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首页> 外文期刊>Bulletin of earthquake engineering >Capacity, damage and fragility models for steel buildings: a probabilistic approach
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Capacity, damage and fragility models for steel buildings: a probabilistic approach

机译：钢制建筑的能力，损坏和脆弱模型：概率方法

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Recently proposed capacity-based damage indices and parametric models for capacity curves are applied to frame steel buildings located in soft soils of the Mexico City. To do that, the seismic performance of 2D models of low-, mid- and high-rise buildings is assessed. Deterministic and probabilistic nonlinear static and incremental dynamic analyses are implemented. Monte Carlo simulations and the Latin Hypercube sampling technique are used. Seismic actions are selected among accelerograms recorded in the study area. Spectral matching techniques are applied, so that the acceleration time histories have a predefined mean response spectrum and controlled error. The design spectrum of the Mexican seismic code for the zone is used as target spectrum. The well-known Park and Ang damage index allows calibrating the capacity-based damage index. Both damage indices take into account the contribution to damage of the stiffness degradation and of the energy dissipation. Damage states and fragility curves are also obtained and discussed in detail. The results reveal the versatility, robustness and reliability of the parametric model for capacity curves, which allow modelling the nonlinear part of the capacity curves by the cumulative integral of a cumulative lognormal function. However, these new capacity-based damage index and capacity models have been tested for and applied to 2D frame buildings only; they have not been applied to 3D building models yet. The Park and Ang and the capacity-based damage indices show that for the analysed buildings, the contribution to damage of the stiffness degradation is in the range 66-77% and that of energy loss is in the range 29-34%. The lowest contribution of energy dissipation (29%) is found for the low-rise, more rigid, building. The energy contribution would raise with the ductility of the building and with the duration of the strong ground motion. High-rise frame buildings in soft soils of Mexico City show the worst performance so tha
机译：最近提出的基于容量的损伤指数和容量曲线的参数模型适用于位于墨西哥城软土的框架钢制建筑。为此，评估了2D低，中高建筑物的2D模型的地震性能。实施确定性和概率非线性静态和增量动态分析。使用蒙特卡罗模拟和拉丁超立方体采样技术。在研究区域记录的加速局中选择了地震行动。应用光谱匹配技术，使得加速时间历史具有预定义的平均响应频谱和受控错误。该区域的墨西哥地震代码的设计谱用作目标光谱。众所周知的公园和ANG损伤指数允许校准基于容量的损伤指数。两种损坏指数都考虑了对刚度降解和能量耗散损坏的贡献。还可以详细获得并详细讨论损伤状态和脆弱曲线。结果揭示了容量曲线的参数模型的多功能性，鲁棒性和可靠性，其允许通过累积算法函数的累积积分来建立容量曲线的非线性部分。但是，已经测试了这些新的基于容量的损伤指数和容量模型，并仅应用于2D框架建筑物;他们还没有应用于3D建筑模型。公园和Ang和基于容量的损伤指数表明，对于分析的建筑物，对刚度降解的损害的贡献在66-77％的范围内，能量损失的贡献范围为29-34％。能量耗散的最低贡献（29％）为低层升高，更严格的建筑。能量贡献将随着建筑物的延展性和强大的地面运动的持续时间提高。墨西哥城软土的高层框架建筑展示了最糟糕的表现所以如此

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