Probabilistic Estimation of Seismic Story Drifts in Reinforced Concrete Buildings
Probabilistic Estimation of Seismic Story Drifts in Reinforced Concrete Buildings
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DOI：
10.1061/(asce)0733-9445(2005)131:3(416
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
T. V. Dinh;T. Ichinose
中科院分区：
文献类型：
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作者：
T. V. Dinh;T. Ichinose
概率技术在预测建筑物的地震层间位移方面具有重要作用，由于未来地震运动特性的不确定性，层间位移会发生变化。本文提出了一个程序来评估预期的平均值和标准差的地震层位移钢筋混凝土建筑物考虑整体和层的破坏机制。估计过程包括对倒三角力的结构进行推覆分析，以评估地震期间最可能的机制，然后考虑相对储备强度，以评估其他机制的概率。对故事和总机制的相对储备强度表示的两个新定义的故事安全和总减少的因素，分别。在本文中，所提出的程序进行动力反应分析的9层墙和框架结构的各种层安全和总折减系数使用36个记录，从14个不同的地震进行验证。所提出的方法很好地预测了结构层间位移的平均值和标准差。并讨论了其在框架-剪力墙结构中的应用。
Probabilistic techniques are of vital use in predicting the seismic story drifts of buildings, which vary due to uncertainties in the characteristics of future earthquake motions. This paper proposes a procedure for evaluating the expected mean and standard deviation of seismic story drifts of reinforced concrete buildings by considering both total and story failure mechanisms. The estimation process consists of a pushover analysis of the structure against inverted triangular forces to evaluate the most probable mechanism during earthquakes, followed by consideration of the relative reserve strengths to evaluate the probability of other mechanisms. The relative reserve strengths against story and total mechanisms are expressed by two newly defined story-safety and total-reduction factors, respectively. In this paper, the proposed procedure is verified by conducting dynamic response analyses of 9-story wall and frame structures with various story-safety and total-reduction factors using 36 records from 14 different earthquakes. The proposed procedure well predicted the mean and standard deviation of story drifts of the structures. Application to wall-frame structures is also discussed.