Fire resistance and associated failure modes of axially restrained hollow core slabs

Thienpont, Thomas; Corte, Wouter De; Caspeele, Robby; Coile, Ruben Van

doi:10.1016/j.firesaf.2023.103827

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…The impacts of concrete's cover thickness and a section's hollow ratio, however, were found marginally significant when compared to other parameters such as slab depth, span length and load ratio (Heo et al, 2021). The structural behavior of the hollow core slab under fire was also influenced by axial restraints provided at supports and the fire resistance was enhanced with the provision of axial restraints (Shakya and Kodur, 2015;Thienpont et al, 2023). The load-bearing performance of prestressed hollow-core slab is influenced by various factors such as slab depth (Pothisiri and Kositsornwanee, 2015;Kodur and Shakya, 2017;Heo et al, 2021), length of slab (Chang et al, 2010;Heo et al, 2021), load ratio (Ehab Ellobody, 2014;Kodur and Shakya, 2017;Heo et al, 2021), axial restraints (Shakya and Kodur, 2015;Thienpont et al, 2023), boundary condition (Kodur and Shakya, 2017) and aggregate type (Aguado et al, 2016).…”

Section: Introductionmentioning

confidence: 98%

“…The structural behavior of the hollow core slab under fire was also influenced by axial restraints provided at supports and the fire resistance was enhanced with the provision of axial restraints (Shakya and Kodur, 2015;Thienpont et al, 2023). The load-bearing performance of prestressed hollow-core slab is influenced by various factors such as slab depth (Pothisiri and Kositsornwanee, 2015;Kodur and Shakya, 2017;Heo et al, 2021), length of slab (Chang et al, 2010;Heo et al, 2021), load ratio (Ehab Ellobody, 2014;Kodur and Shakya, 2017;Heo et al, 2021), axial restraints (Shakya and Kodur, 2015;Thienpont et al, 2023), boundary condition (Kodur and Shakya, 2017) and aggregate type (Aguado et al, 2016). Based on an extensive review of the literature, it is observed that factors governing the performance of hollow-core slabs were predicted for standard fire curve exposure and there is limited research considering the worst-case fire scenario.…”

Section: Introductionmentioning

confidence: 99%

“…, 2021). The structural behavior of the hollow core slab under fire was also influenced by axial restraints provided at supports and the fire resistance was enhanced with the provision of axial restraints (Shakya and Kodur, 2015; Thienpont et al. , 2023).…”

Section: Introductionmentioning

confidence: 99%

“…, 2021), load ratio (Ehab Ellobody, 2014; Kodur and Shakya, 2017; Heo et al. , 2021), axial restraints (Shakya and Kodur, 2015; Thienpont et al. , 2023), boundary condition (Kodur and Shakya, 2017) and aggregate type (Aguado et al.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on performance of prestressed hollow core slabs exposed to elevated temperatures

Jeyashree,

Kannan Rajkumar

2023

JSFE

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PurposeThis study focused on identifying critical factors governing the fire response of prestressed hollow-core slabs. The hollow-core slabs used as flooring units can be subjected to elevated temperatures during a fire. The fire response of prestressed hollow-core slabs is required to develop slabs with greater fire endurance. The present study aims to determine the extent to which the hollow-core slab can sustain load during a fire without undergoing progressive collapse under extreme fire and heating scenarios.Design/methodology/approachA finite element model was generated to predict the fire response of prestressed hollow core slabs under elevated temperatures. The accuracy of the model was predicted by examining thermal and structural responses through coupled temperature displacement analysis. A sensitivity analysis was performed to study the effects of concrete properties on prediction of system response. A parametric study was conducted by varying the thickness of the slab, fire and heating scenarios.FindingsThermal conductivity and specific heat of concrete were determined as sensitive parameters. The thickness of the slab was identified as a critical factor at a higher load level. Asymmetric heating of the slab resulted in higher fire resistance compared with symmetric heating.Originality/valueThis is the first study focused on studying the effect of modeling uncertainties on the system response by sensitivity analysis under elevated temperatures. The developed model with a parametric study helps in identifying critical factors for design purposes.

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