Numerical study of progressive collapse resistance of RC beam-slab substructures under perimeter column removal scenarios

Yu, Jun; Luo, Lizhong; Li, Yang

doi:10.1016/j.engstruct.2017.12.038

Cited by 97 publications

(25 citation statements)

References 29 publications

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“…These limitations tend to accentuate the contribution of slab towards progressive collapse capacity, as the shell elements are not capable of exhibiting true non-linear behavior. Yu et al (2018) demonstrated through experimental studies that for small deflections (< ¾ beam depth), contribution of slab to progressive collapse capacity was around 10% and increased to a maximum of 30% for larger deflections. Similarly, Botez et al (2016) found contribution from the slab membrane action to be maximum of 15% to the overall flexural capacity.…”

Section: Assumptionsmentioning

confidence: 97%

Progressive collapse of reinforced concrete buildings considering flexure-axial-shear interaction in plastic hinges

2021

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Section: Assumptionsmentioning

confidence: 97%

Progressive collapse of reinforced concrete buildings considering flexure-axial-shear interaction in plastic hinges

2021

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“…axial stiffness at the beam boundaries, amount of integrity reinforcement at bar cut-off locations, etc) on progressive collapse resistance of frames. High fidelity solid-element-based numerical models were used by Yu et al [10] to investigate the robustness of RC beam-slab substructures under perimeter column removal scenarios. Shan et al [11] tested two one-third scale, four-bay by two-story RC frame to investigate the effects of infilled wall on the load resisting mechanisms of RC frames.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on load redistribution capacity of flat slab substructures to resist progressive collapse

Weng

Qian

et al. 2020

Journal of Building Engineering

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To study the load redistribution capacity of reinforced concrete (RC) flat slab structures subjected to a middle column loss scenario, high fidelity finite element (FE) models were built using commercial software LS-DYNA. The numerical models were validated by experimental results. It is found that the continuous surface cap model (CSCM) with an erosion criterion considering both the maximum principal and shear strain could effectively predict the punching shear failure at slabcolumn connections. The validated FE models were employed to investigate the effect of boundary conditions, amount of integrity reinforcement, and slab thickness on the load redistribution capacity of flat slab structures. Furthermore, multi-story RC flat slab substructures were built to capture the load redistribution behavior of different floors. Parametric studies indicate that ignoring the constraints from surrounding slabs may underestimate the load redistribution capacity of the flat slab substructures. Therefore, it is suggested that in future numerical or experimental studies, rigid horizontal constraints should be applied at the slab edge of the substructure to well represent the constraints from surrounding slabs. In addition, it is also found that the amount of integrity reinforcement would significantly affect the post-punching performance of flat slab structures. It is suggested that the minimum integrity reinforcement ratio should be 0.63 %.

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“…Alternate load path method is one of threat-independent approaches to the check the ability of the remaining structures to bridge over a removed column or wall. Consequently, a series of experimental and numerical studies have been carried out to evaluate the load-redistribution capability of reinforced concrete (RC) beam-column assemblies or frames (Deng et al, 2020; Feng et al, 2016; Kang and Tan, 2015; Qian et al, 2020; Yi et al, 2008; Yu and Tan, 2013a, 2013b, 2017) and beam-slab systems (Lim et al, 2017; Lu et al, 2017; Qian et al, 2015, 2016; Yu et al, 2018, 2020) under column removal scenarios (CRS). The priority of research given to the frames and beam-slab systems is because the former is regarded as the primary structural members to redistribute the gravity loads and the large deformation of the latter is regarded as the last line of defense against progressive collapse.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of dynamic responses of reinforced concrete infilled frames subjected to progressive collapse

Gan

Liu

2020

Advances in Structural Engineering

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Recently, the contribution of infill walls on progressive collapse resistance of reinforced concrete (RC) structures attracts a great many research attentions, but the research interests are mainly concentrated on the static resistance and the macro-modeling approaches, which require predefined one-dimensional load paths through two-dimensional walls. However, the load transfer paths in dynamic loading regime are still not fully understood. To this end, high-fidelity finite element (FE) models of multi-story RC infilled frames are built and validated through quasi-static experimental results. Then the FE models are used to investigate the dynamic responses of infilled frames under different single and double CRS as well as the effect of the number of stories on the load transfer paths of full-height infill walls (FHIW) and infill walls having opening (IWHO). The results indicate that the load paths along the infill walls in static and dynamic loading regimes are similar prior to the peak resistance but different in post-peak resistance for single infilled story frames. Such difference results from the loading distribution pattern, in which the static loading is typically represented by a concentrated load whereas the dynamic loading involves the uniformly distributed load. Moreover, increasing the number of infilled stories with FHIW, trans-story load paths due to composite effect always exist to enhance resistance and such paths are scenario-dependent. In comparison, the load paths for multi-story frames with IWHO are relatively scenario-independent with minor composite effect. Therefore, to generalize the macro-modeling, it is conservative to ignore the trans-story load paths.

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Numerical study of progressive collapse resistance of RC beam-slab substructures under perimeter column removal scenarios

Cited by 97 publications

References 29 publications

Progressive collapse of reinforced concrete buildings considering flexure-axial-shear interaction in plastic hinges

Progressive collapse of reinforced concrete buildings considering flexure-axial-shear interaction in plastic hinges

Numerical investigation on load redistribution capacity of flat slab substructures to resist progressive collapse

Numerical study of dynamic responses of reinforced concrete infilled frames subjected to progressive collapse

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