Fuzzy‐Valued Intensity Measures for Near‐Fault Pulse‐Like Ground Motions
Fuzzy‐Valued Intensity Measures for Near‐Fault Pulse‐Like Ground Motions
复制标题
DOI：
10.1111/mice.12053
复制
发表时间：
2013-11
期刊：
影响因子：
--
通讯作者：
Hao Li;W. Yi;Xian-Xun Yuan
中科院分区：
文献类型：
--
作者：
Hao Li;W. Yi;Xian-Xun Yuan
本文提出了两种基于模糊值（FV）的结构强度测度（IM），一种基于速度谱平方，另一种基于非弹性位移谱，用于描述混凝土框架结构基于性能的抗震设计和评估中的近断层脉冲型地震动。第一个IM是通过模糊结构基本周期来设计的，以考虑由于刚度退化而产生的周期偏移效应，而第二个IM是通过采用前两个或三个模态的模糊组合来考虑高层建筑中较高模态的贡献。推覆分析中的侧向荷载模式。三个钢筋混凝土框架结构的基准研究表明，对于中到中期的结构，与现有的IM相比，这两个建议的IM提高了预测精度。对于短周期结构，FV非弹性谱位移是最好的。
Two fuzzy‐valued (FV) structure‐specific intensity measures (IMs), one based on squared spectral velocity and the other on inelastic spectral displacement, are presented to characterize near‐fault pulse‐like ground motions for performance‐based seismic design and assessment of concrete frame structures. The first IM is designed through fuzzying structural fundamental period to account for the period shift effect due to stiffness degradation, whereas the second IM is developed to take into account higher mode contribution in high‐rise buildings by employing a fuzzy combination of the first two or three modes for the lateral loading pattern in pushover analysis. A benchmark study of three example reinforced concrete frame structures shows that for moderate‐ to medium‐period structures, both of the proposed IMs improve prediction accuracy in comparison with the existing IMs. For short‐period structures, the FV inelastic spectral displacement is the best.