顶部增设桁架对RC框架梁的连续倒塌性能影响

个别结构构件的失效对社会造成损失,而构件的连续失效会引起结构整体倒塌带来的更大甚至巨大的损失.因此,加强现有工程结构的抗连续倒塌能力势在必行.本文提出了一种在现有结构的顶部增设空间桁架能有效提高原结构的抗连续倒塌性能的方法.以GSA2003为基准,采用SAP2000有限元软件对增设桁架前后两种结构的抗连续倒塌性能进行了分析,得出该方法是一种能够加固并改善现有结构抗连续倒塌能力的有效方法.

The effect of top truss on structural progressive collapse of RC frame beam

The failure of a single structural member leads to loss to the society, and the progressive failure of the structural members causes the collapse of the structure results in more or even great losses. Therefore, it is imperative to enhance the progressive collapse resisting capacity of the existing engineering structure. This paper proposes that the progressive collapse resisting capability can be improved by adding top truss to the original structure. Based on GSA2000, by comparing the progressive collapse resisting performance of the structure before and after adding the top truss with software SAP 2000, this research proves that top truss is an effective way to reinforce present structure and improve its progressive collapse resisting capacity.