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首页> 外文期刊>Bulletin of earthquake engineering >Seismic fragility assessment for reinforced concrete high-rise buildings in Southern Euro-Mediterranean zone
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Seismic fragility assessment for reinforced concrete high-rise buildings in Southern Euro-Mediterranean zone

机译：欧洲南部地中海地区钢筋混凝土高层建筑的地震易损性评估

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摘要

This paper presents seismic fragility assessment of RC high rise-buildings for seismic excitation, typical for Southern Euro-Mediterranean zone. The fragility curves were derived and log-normal cumulative distribution function parameters were obtained for the four defined damage states by conducting 3600 nonlinear time-history analyses on the basis of 60 ground motions with wide range of magnitudes, distance to source and different site conditions, including in this way uncertainties during ground motion selection. As a prototype buildings, 20-story, 30-story and 40-story RC high-rise buildings with core wall structural system were chosen. The key points of the process for obtaining the fragility curves are shown by using algorithm, defined in this paper, and generally applicable to all types of RC high-rise buildings. For the purpose of conducting nonlinear time-history analyses, non-linear 3D models of the buildings were designed. A detailed probabilistic seismic damage analysis was done and as its result the limit states as well as corresponding damage states for RC high-rise buildings were defined, where the damage states were treated as random variables. Inter-storey drifts at threshold of damage state were defined as random variables with the range of possible values. Since no probabilistic fragility curves exist for this class of buildings and for this seismic zone, this work partially fills the void in Southern Euro-Mediterranean seismic risk assessment. The whole approach presented in this paper may be used for efficient obtaining probabilistic fragility curves for RC high-rise buildings of different configurations.
机译：本文介绍了南欧-地中海地区典型的RC高层建筑地震激励下的地震易损性评估。通过在60种不同幅度，距震源距离和不同场地条件的地面运动的基础上进行3600次非线性时间历史分析，得出了四种定义的破坏状态的脆性曲线并获得了对数正态累积分布函数参数，包括在地面运动选择过程中的不确定性。作为原型建筑，选择了具有核心墙结构体系的20层，30层和40层的RC高层建筑。本文定义了算法，给出了脆性曲线求取过程的重点，一般适用于所有类型的钢筋混凝土高层建筑。为了进行非线性时间历史分析，设计了建筑物的非线性3D模型。进行了详细的概率地震破坏分析，结果定义了RC高层建筑的极限状态以及相应的破坏状态，其中破坏状态被视为随机变量。损伤状态阈值的层间漂移被定义为具有可能值范围的随机变量。由于此类建筑物和该地震带都不存在概率易碎性曲线，因此这项工作部分填补了南欧-地中海地震风险评估中的空白。本文提出的整个方法可用于有效获取不同构造的RC高层建筑的概率脆性曲线。

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