Experimental and Numerical Investigations on Fire-Resistance Performance of Precast Concrete Hollow-Core Slabs

Heo, Inwook; Darkhanbat, Khaliunaa; Han, Sekyung; Choi, Sung Mo; Jeong, Hae‐Chang; Kim, Kang Su

doi:10.3390/app112311500

Cited by 9 publications

(13 citation statements)

References 30 publications

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“…It is obvious that there are few parametric studies committed to spalling; the majority of spalling records are merely observations on the experiment [19,28]. Just as comparing the outcomes of multiple investigations is impossible due to the varying conditions of each experiment [1,4,21], Unfortunately, in previous research, the types of concrete with which the appearance of spalling spreads, such as high-strength, low-permeability concrete, were not widely used. Spalling is expected to be more widespread in loaded HCS due to the combined impact of tension force caused by loading and spalling.…”

Section: Spalling Accessibilitymentioning

confidence: 99%

“…Its efficiency in this isolation is based on a variety of factors, including aggregate type, moisture content, and concrete cover. Some research illustrates the efficiency of improving the fire isolation of strands by increasing the concrete cover [12] or using additional layers of concrete topping [1]. Furthermore, to prevent air circulation, isolate the unexposed top surface of HCS with fireresistant materials [2] or fill HCS holes with mineral wool [10].…”

Section: The Effect Of Using Fire Insulation Increasing Cover Thickne...mentioning

confidence: 99%

“…are often used as the limiting criteria to assess slab failure. The volume of fire-induced spalling and cracking phenomena in HCS was studied by a small number of researchers using data and observations from tests [1,4,7,[14][15][16][17][18][19][20][21].…”

Section: Failure Mechanismsmentioning

confidence: 99%

“…Figure 1. Prestressed hollow-core slabs [1] The performance of HCS units vulnerable to fire is particularly difficult and is attributable to the unusual cross-section (CS) featuring voids. HSC display substantial compressive stresses in the flanges, whereas tensile stresses (Ft) occur in the web which might surpass the Ft capacity of concrete, arising in premature shear failure of HSC susceptible to fire.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the maximum allowable deformation of the S1 sample being 360.0 mm and the S2 sample being 285.7 mm, respectively, concrete spalling was seen in both the S1 and S2 samples in the bottom half of the member exposed to the flame. The origins of the spalling were hypo-thesis to be the mobility of free water in concrete and the moisture created by the dehydration process[1].…”

mentioning

confidence: 99%

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Prestressed hollow-core slabs performance at high temperatures- A review

Aziz¹

2023

MSA Engineering Journal

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Pre-stressed concrete hollow core slabs (HCS) are now progressively used in commercial, industrial, and residential buildings due to their sustainability, affordability, and adaptability. The performance of HCS units subjected to fire is particularly difficult and is attributable to their unusual cross-section, which features voids. Numerous investigations were executed on HCS at high temperatures concerning the crucial temperature and failure mechanisms of both concrete and prestressing steel. Fire performance is influenced by a number of variables, including support condition, concrete aggregate type, slab thickness, fire insulation and cover thickness for reinforcement, spalling accessibility, void cores and size, and firing methodology. While a number of these variables have received extensive research, some have been noted as potential contributory reasons for failure, while others have received relatively little attention. This paper summarises numerous experimental, numerical, and analytical studies about the attitude of HCS vulnerable to fire in addition the building standards limitations to provide a valuable reference for future researchers.

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