Behaviour of composite floors with different sizes of edge beams in fire

Nguyen, Tuan Trung; Tan, Kang Hai

doi:10.1016/j.jcsr.2016.10.018

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…The cracking moment was more susceptible to temperature rise, due to the sensitive nature of the tensile strength of concrete. The research outcome is also a factor of the original material properties and the dimension of the cross-section [28]; the model could hence be expanded to accommodate the variables within this corridor.…”

Section: Discussionmentioning

confidence: 99%

Concrete-Galvalume Composite Behavior under Elevated Temperatures, Experiment and Numerical Simulation

Maryoto¹,

Aylie²,

H³

2019

Preprint

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A galvalume corrugated sheet was utilized as formwork for a reinforced concrete beam in flexure. A numerical model was validated to the experimentally obtained data, and further adopted to simulate the behavior of this composite structure under elevated temperatures. The properties and constitutive stress-strain data of the basic materials were obtained from experiments, and superimposed into the finite element model. The study concluded that the load carrying capacity of the member decreased as a direct function on temperature increase, and the cracking moment was very sensitive to the temperature fluctuation. The elevated temperatures also altered the failure mode.

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Section: Discussionmentioning

confidence: 99%

Concrete-Galvalume Composite Behavior under Elevated Temperatures, Experiment and Numerical Simulation

Maryoto¹,

Aylie²,

H³

2019

Preprint

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“…It was found that failure modes of the slab depend on reinforcement layout, aspect ratio and boundary condition. Nguyen and Tan [20] conducted experiments on three one quarter scale composite slabs with different bending stiffnesses of protected edge beams under fire conditions. The results showed that an increase of the edge beam bending stiffness initially reduced the deflection.…”

Section: Figure 1: Tensile Membrane Action Mechanismmentioning

confidence: 99%

Improving the performance of composite floors subjected to post-earthquake fire

Suwondo

Cunningham

Gillie

et al. 2018

Fire Safety Journal

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It is well-known that tensile membrane action in concrete floor slabs can enhance the fire resistance of a composite steel frame building. Vertical supports provided by protected beams along the edge of the slab panel play an important role in the development of the tensile membrane actions. The present study investigates the effect of fire insulation delamination on the protected beam, as might occur in an earthquake, on the fire resistance of composite floors subject to fire following an earthquake. The results show that fire insulation delamination considerably reduces the development of tensile membrane action. Based on the results obtained, two methods of improvement are presented to enhance the development of tensile membrane action concurrent with fire insulation delamination. It is found that increasing slab thickness and improving fire protection rating can enhance the fire resistance of the whole building even with fire insulation delamination.

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“…After investigations on the accidental fire incident at Broadgate (The Steel Construction Institute, 1991) and the large scale tests at Cardington (British Steel, 1997), slabs were found to sustain their load resistance by developing tensile membrane action (TMA). Indeed, the discovery of this load path invigorated a new path of structural-fire research concerned with the factors contributing to the emergence of this mechanism (Abu et al, 2012(Abu et al, , 2013Nguyen and Tan, 2017), its ultimate capacity (Burgess, 2017;Huang et al, 2003;Tan and Nguyen, 2015) and how to exploit it for design (Bailey et al, 2000(Bailey et al, , 2008Cameron and Usmani, 2005). A wealth of experimental data primarily concerned with TMA has been generated over the last two decades (Cashell et al, 2011a;Li et al, 2017;Lim and Wade, 2002;Nguyen and Tan, 2015;Vassart and Zhao, 2011), which provided a fertile environment for development and validation of numerical solution methods (Cashell et al, 2011b;Elghazouli and Izzuddin, 2004;Gillie et al, 2002;Huang et al, 1999Huang et al, , 2001Huang et al, , 2002Jiang et al, 2014;Jiang et al, 2021a, b;Lim et al, 2004;Omer et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the discovery of this load path invigorated a new path of structural-fire research concerned with the factors contributing to the emergence of this mechanism (Abu et al. , 2012, 2013; Nguyen and Tan, 2017), its ultimate capacity (Burgess, 2017; Huang et al. , 2003; Tan and Nguyen, 2015) and how to exploit it for design (Bailey et al.…”

Section: Introductionmentioning

confidence: 99%

Modelling concrete slabs subjected to localised fire action with OpenSees

Orabi

Qiu

Jiang

et al. 2022

JSFE

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PurposeReinforced concrete slabs in fire have been heavily studied over the last three decades. However, most experimental and numerical work focuses on long-duration uniform exposure to standard fire. Considerably less effort has been put into investigating the response to localised fires that result in planarly non-uniform temperature distribution in the exposed elements.Design/methodology/approachIn this paper, the OpenSees for Fire framework for modelling slabs under non-uniform fire exposure is presented, verified against numerical predictions by Abaqus and then validated against experimental tests. The thermal wrapper developed within OpenSees for Fire is then utilised to apply localised fire exposure to the validated slab models using the parameters of an experimentally observed localised fire. The effect of the smoke layer is also considered in this model and shown to significantly contribute to the thermal and thus thermo-mechanical response of slabs. Finally, the effect of localised fire heat release rate (HRR) and boundary conditions are studied.FindingsThe analysis showed that boundary conditions are very important for the response of slabs subject to localised fire, and expansive strains may be accommodated as deflections without severely damaging the slab by considering the lateral restraint.Originality/valueThis work demonstrates the capabilities of OpenSees for Fire in modelling structural behaviours subjected to non-uniform fire conditions and investigates the damage pattens of flat slabs exposed to localised fires. It is an advancing step towards understanding structural responses to realistic fires.

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Behaviour of composite floors with different sizes of edge beams in fire

Cited by 13 publications

References 6 publications

Concrete-Galvalume Composite Behavior under Elevated Temperatures, Experiment and Numerical Simulation

Concrete-Galvalume Composite Behavior under Elevated Temperatures, Experiment and Numerical Simulation

Improving the performance of composite floors subjected to post-earthquake fire

Modelling concrete slabs subjected to localised fire action with OpenSees

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