Investigation on progressive collapse behavior of column-through beam-column joints in asymmetric RCS frame structure

被引：0
|
作者：
Tang H. [1 ]
Deng X. [1 ]
Xiong J. [2 ]
Huang J. [1 ]
机构：
[1] Institute of Structural Engineering, Xihua University, Chengdu
[2] School of Civil Engineering and Architecture, Nanchang University, Nanchang
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷 / 04期
关键词：
Asymmetric failure; Column-through beam-column joint; Full bolted connection; Progressive collapse; RCS frame structure;
D O I：
10.14006/j.jzjgxb.2019.0173
中图分类号：
学科分类号：
摘要：
Most of the structural vertical progressive collapse failures are caused by the failure of side column. Since the lateral stiffness of the structures on both sides of the failure column are different, the asymmetric destruction of the structures along the failure column may occur. Since there is few research on asymmetric progressive collapse in existing literature, the asymmetric double-half-span single-column structure was taken as the research object, and a column-through beam-column joint substructure with full bolted connections for reinforced concrete column-steel beam (RCS) structure was designed. The complete process of asymmetric collapse and destruction of the structure under the failure of side column was simulated through static loading test. The difference of lateral stiffness of columns between the two sides of the substructure was simulated through unequal frame span. Meanwhile, the mechanical mechanism and failure modes of the substructure under progressive collapse were investigated using finite element analysis. The results were compared with those of traditional symmetrical double-half-span substructures. It is found that the upper flange of the side with smaller lateral stiffness sustains local buckling firstly when the full bolted connection substructure fails. Moreover, the rotational capacity of the beam end is less than that with middle column failure. The catenary effect of the structure cannot be fully exerted, which also causes the anti-progressive collapse capacity lower than those structures with middle column failure. However, the ultimate rotation angle of the beam end obtained from the test and finite element analysis is higher than the allowable limit of rotation specified in DoD, indicating that DoD is conservative for evaluating the progressive collapse capacity for the fully bolted connections in this type of column-through RCS structure. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：92 / 102
页数：10
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