Theoretical analysis on the progressive collapse of RC frame structures with slabs

被引：0
|
作者：
Gao J.-M. [1 ]
Liu B.-Q. [1 ]
Huang H. [1 ]
Zhou C.-Q. [1 ]
机构：
[1] School of Civil Engineering, Chang'an University, Xi'an, 710061, Shaanxi
来源：
Gongcheng Lixue/Engineering Mechanics | 2018年 / 35卷 / 07期
关键词：
Catenary; Collapse experiment; Progressive collapse; RC frame structure with slab; Tensional membrane; Theoretical research;
D O I：
10.6052/j.issn.1000-4750.2017.03.0201
中图分类号：
学科分类号：
摘要：
A quasi-static test was carried out to experimentally study the progressive collapse of a two-story 2 × 1 bay spatial frame structure with slabs. The progressive collapse mechanism and deformation failure mode of the residual structure due to a side column loss were analyzed. The results indicate that the whole collapse resistance of RC frame structure is successively provided by beam arch-slab pressure membrane mechanism, beam arch-slab tensional membrane mechanism, beam catenary-slab tensional membrane mechanism and slab tensional membrane mechanism. The structural deformation process experiences three stages including the extrapolative stage, adductive stage and collapsed stage. The maximum resistance appears at a breaking point, which lies between stringing inward section and pushing outward section of the frame column (beam catenary-slab tensional membrane mechanism). The structure changes into a slab-column model when the beam is damaged, and the slab can maintain the resistance at a high level. The resistance and critical displacement at the key points of structural collapse are theoretically analyzed. A calculation method of structural ultimate load-bearing capacity is proposed. The ultimate load-bearing capacity and beam's rotation angle should be taken into consideration in the criteria for structural collapse. © 2018, Engineering Mechanics Press. All right reserved.
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页码：117 / 126
页数：9
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