Quantifying panel zone effect on deflection amplification factor
Quantifying panel zone effect on deflection amplification factor
复制标题
量化面板区域对偏转放大系数的影响
DOI：
10.1002/tal.1446
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
B. Kordbagh
中科院分区：
文献类型：
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作者：
M. Mohammadi;B. Kordbagh
漂移是高层建筑设计中的一个主要特征，可以决定结构体系的选择。由于对实际漂移的可靠估计对于控制结构损伤至关重要，因此考虑到复杂的细节来估计漂移似乎值得注意。为了估计在大地震期间的楼层漂移，抗震设计规定通常指定一个挠度放大系数(CD)来放大弹性设计漂移。在大多数这些代码中，CD的量是根据线元素模型计算的，没有考虑面板区域的影响，尽管面板区域大大加剧了故事的漂移。因此，本文研究了板区对楼层位移和CD的影响。由于Cd与层数无关，因此使用4层框架作为特殊钢框架的基准，这些框架具有不同的板区厚度。提供了面板区域效应作为CD的修正因子。结果表明，分析模型中应考虑板区的影响，否则，楼层位移将被低估高达35%。最后，导出了考虑板区影响的板区厚度与板区厚度的关系式。
Drift is a dominant feature in tall‐building design and can dictate the selection of structural systems. Because a reliable estimate of actual drifts is crucial for controlling structural damage, estimating drift considering intricate details seems noteworthy. In order to estimate story drifts during massive quakes, seismic design provisions generally specify a deflection amplification factor (Cd) to amplify elastic design drifts. In most of these codes, the amount of Cd is calculated from line‐element models without considering panel zone effects, despite the panel zone intensifying the story drift considerably. Therefore, the effect of panel zone on the story drift and Cd has been investigated in the current paper. Because Cd is independent of the number of stories, 4‐story frames, as benchmarks for special steel moment frames, with different thicknesses of the panel zone, are used. The effect of panel zone is provided as a correction factor for Cd. The results show that the panel zone should be considered in the analytical models; otherwise, the story drift will be underestimated up to 35%. Finally, a relation has been derived to consider panel zone effects on Cd, as a function of the panel zone thickness.