Impact of two columns missing on dynamic response of RC flat slab structures

Qian, Kai; Weng, Yun-Hao; Li, Bing

doi:10.1016/j.engstruct.2018.10.011

Cited by 44 publications

(9 citation statements)

References 26 publications

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“…Within this latter group, diverse numerical and experimental studies have analysed the structural response of buildings subjected to column removal as recommended in most current codes [13][14][15]. Although these studies included the possible causes of column failures, including internal [16][17][18][19][20][21][22][23], external [2,16,[24][25][26][27][28][29][30][31] and corner columns (e.g. [32][33][34]), few studies have been done on corner column failures, even though these are the most vulnerable columns in the structure (e.g.…”

Section: Some Events With a High Impact Amongst The Engineering Commumentioning

confidence: 99%

Dynamic performance of a real-scale reinforced concrete building test under a corner-column failure scenario

Adam

Buitrago

Bertolesi

et al. 2020

Engineering Structures

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Section: Some Events With a High Impact Amongst The Engineering Commumentioning

confidence: 99%

Dynamic performance of a real-scale reinforced concrete building test under a corner-column failure scenario

Adam

Buitrago

Bertolesi

et al. 2020

Engineering Structures

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“…However, for Specimens WD and ND, the constraints from surrounding slabs were simulated by applying service pressure at the overhang, which is one-quarter of column spacing. Previous works [25] found that the simplified boundary may underestimate the constraints from surrounding slabs. Thus, to further understand the discrepancy between the simplified boundaries and realistic boundaries, four numerical models with different constraints at the overhang (refer to Fig.…”

Section: Effects Of Surrounding Slabsmentioning

confidence: 95%

“…Peng et al [24] carried out a series of dynamic tests to study the dynamic response of flat plate substructure subjected to instantaneously removal of an exterior column. Qian et al [25] conducted experimental and numerical studies to evaluate the dynamic response of flat slab structures subjected to different extents of initial local damage (one-column or two-column removal).…”

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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“…The plastic behavior especially for compressive arch action (CAA) and tensile catenary action (TCA) could not be evaluated well. Therefore, majority of existing tests in laboratory regarding progressive collapse were single-storey RC beamcolumn substructures (Su et al 2009, Qian and Li 2012, Yu and Tan 2013, Farhag et al 2013, Liu et al 2015, Ren et al 2016, Lu et al 2018, Qian et al 2018, Qian and Li 2019b.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Single-Storey Substructures to Equivalently Investigate Behavior of Multi-Storey Frames

Qian¹,

Huang²,

Lan³

et al. 2020

Structures Congress 2020

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Progressive collapse is a global failure in a multi-storey frame. All stories above the removed column will help to redistribute the loads initially resisted by the removed column together. However, due to time and cost saving, majority of existing experimental studies on progressive collapse is based on single-storey beam-column substructures. To date, how to use the results from single-storey substructures to equivalently investigate the behavior of multi-storey building is still unclear. Thus, for this purpose, in this study, a series of planar multi-storey RC beamcolumn substructures are modeled using high-fidelity finite element software LS-DYNA. The validated models were used to capture the difference of mobilization of load resisting mechanism in different stories.

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Impact of two columns missing on dynamic response of RC flat slab structures

Cited by 44 publications

References 26 publications

Dynamic performance of a real-scale reinforced concrete building test under a corner-column failure scenario

Dynamic performance of a real-scale reinforced concrete building test under a corner-column failure scenario

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

Reliability of Single-Storey Substructures to Equivalently Investigate Behavior of Multi-Storey Frames

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