Lateral Load Behavior of an Open-Ground-Story RC Building with AAC Infills in Upper Stories
Lateral Load Behavior of an Open-Ground-Story RC Building with AAC Infills in Upper Stories
复制标题
上层采用 AAC 填充的开放式地面 RC 建筑的横向荷载行为
DOI：
10.1193/121413eqs295m
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
D. Rai
中科院分区：
文献类型：
--
作者：
S. Bose;D. Rai
蒸压加气混凝土（AAC）砌体填充在上部楼层可以有益于改善开放地面层（OGS），钢筋混凝土（RC）框架建筑的地震反应。两个减少1：2.5比例模型的单层，单跨钢筋混凝土框架与不AAC填充砌体的阻力性能和滞回性能进行了测试。AAC砌体的强度和刚度较低，约为传统砖砌体的一半，导致填充物和框架之间的荷载分担得到改善，这有助于框架屈服机制的早期发展，以增强能量耗散。试验结果被用来评估使用现有的强度和刚度关系的常规砌体填充RC框架AAC填充框架的可靠性。分析模型的开发，以预测所观察到的滞回性能的测试标本。对一个五层四跨OGS-RC框架进行了非线性分析，分析中采用了传统的砖砌体填充体和相对较软、较弱的AAC填充体。结果表明，在框架上部设置AAC填充体，可以将软弱地基层对框架结构的不良影响降低到可接受的水平。
Autoclaved aerated concrete (AAC) masonry infills in upper stories can be beneficial for improving the seismic response of open-ground-story (OGS), reinforced concrete (RC)–frame buildings. Two reduced 1:2.5-scale models of single-story, single-bay RC frames with and without AAC infill masonry were tested for resistance properties and hysteretic behavior. Low strength and stiffness of AAC masonry, about half of the conventional brick masonry, led to improved load sharing between the infill and the frame, which helped an early development of frame yield mechanism for enhanced energy dissipation. Test results were used to evaluate the reliability of using existing strength and stiffness relations of conventional masonry infilled RC frames for AAC infilled frames. Analytical models were developed to predict the observed hysteretic behavior of tested specimens. Nonlinear analyses of a five-story, four-bay OGS-RC frame were performed for conventional brick masonry infills and relatively softer and weaker AAC infills in upper stories. The results indicated that the undesirable effect of weak/soft ground story mechanism of OGS-RC frames can be reduced to an acceptable level by using AAC infills in upper stories.