The Effects of Bracing on the Behavior of RC Multi-Story Frames to Resist Progressive Collapse
The Effects of Bracing on the Behavior of RC Multi-Story Frames to Resist Progressive Collapse
复制标题
DOI：
10.1061/9780784480397.015
复制
发表时间：
2017-04
期刊：
影响因子：
--
通讯作者：
Kai Qian;Yang Yu;Yue Wang;Bing Li
中科院分区：
文献类型：
--
作者：
Kai Qian;Yang Yu;Yue Wang;Bing Li
钢支撑是提高钢筋混凝土框架抗侧力的有效措施之一。然而，对于钢支撑对提高钢筋混凝土框架结构抗连续倒塌性能的作用，国内外研究较少。本文通过试验研究了钢支撑对钢筋混凝土框架抗连续倒塌性能的影响。对三层一个无支撑框架和两个带钢支撑的框架进行了试验研究。结果表明，在大变形阶段，钢支撑可使第一峰值荷载提高126.9%，而对悬链线作用影响不大。总体而言，偏心支撑体系的性能优于同心支撑体系。
Steel bracing has proven to be one of the effective methods to upgrade lateral load resistance of reinforced concrete (RC) frames. However, little studies had been carried out on the efficiency of steel bracing for improving the behavior of RC frames in resisting progressive collapse. In this paper, the effects of steel bracing on the behavior of RC frames in mitigating progressive collapse are investigated experimentally. One bare frame without bracing and two braced frames with additional steel bracing in the third floor are tested. It is found that steel braces could increase the first peak load up by 126.9 % while the braces has little effects on the catenary action in large deformation stages. In general, the eccentric bracing system is performed better than the concentric one.