A new mitigation scheme to resist progressive collapse of RC structures
A new mitigation scheme to resist progressive collapse of RC structures
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DOI：
10.1016/j.conbuildmat.2016.08.084
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发表时间：
2016-10
影响因子：
7.4
通讯作者：
Kamal Alogla;L. Weekes;Levingshan Augusthus-Nelson
中科院分区：
文献类型：
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作者：
Kamal Alogla;L. Weekes;Levingshan Augusthus-Nelson
钢筋混凝土结构由于缺乏足够的连续配筋，可能容易发生连续倒塌。在大多数准则中，已引入了减少连续倒塌的一般结构完整性要求，但结构抗连续倒塌的设计尚未成为主要考虑因素。提出了一种缓解方案，以增加对连续倒塌的抵抗力。这涉及在钢筋混凝土梁的中间层提供额外的钢筋。在这里报道的研究中，四个标本的设计和测试准静态加载条件下的列删除的情况。一个测试样本用常规钢筋制成，三个样本在梁的中间深度处用附加钢筋制成。准静态行为的测试样本被转换为动态表示使用能量平衡的方法，以获得渐进的崩溃负载。试验结果表明，所提出的方案显着提高了混凝土梁的延性和崩溃的能力受到柱删除的情况。
Reinforced concrete structures may be vulnerable to progressive collapse due to lack of sufficient continuous reinforcement. In most guidelines, general structural integrity requirements to reduce progressive collapse have been introduced, but the design of structures against progressive collapse has not been a major consideration. A mitigation scheme is proposed to increase resistance against progressive collapse. This involves the provision of additional reinforcement bars in the mid-layer of reinforced concrete beams. In the research reported here, four specimens were designed and tested subject to quasi-static loading conditions for a column removal scenario. One test specimen was made with conventional steel reinforcement and three specimens were made with additional steel reinforcement at the mid depth of the beam. The quasi-static behaviour of the test specimens were converted to a dynamic representation using an energy balance approach to obtain the progressive collapse load. Test results show that the proposed scheme significantly improves the ductility and collapse load of concrete beams subject to a column removal scenario.