Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fire behaviour of hollow core slabs
https://orcid.org/0000-0001-8373-7291
https://orcid.org/0000-0002-0369-8972
Abstract The objective of our research was to develop an optimum concrete mix for fire resistance, that is usable for hollow core slab prefabrication. Small-scale and full-scale tests were done, and the results were used to calibrate a numerical model that can be used to determine the temperature and load capacity reduction of steel reinforcement. With the help of the calibrated model, the effects of geometric variables were examined. The thickness of the ridge between the cavities has no effect on the change in the maximum temperature of the protected side in the examined 30-minute range, but the minimum temperature decreased.
Highlights The objective of our research was to develop an optimum concrete mix for fire resistance, that is usable for hollow core slab prefabrication. We performed two tests. In the first test, the fire resistance of the slab is REI 60 for operational loads and REI 90 for industrial loads (max. 5 kN/m2). In the second test, the slab fire resistance at service load was REI 15. During the research, we created a method with a spatial numerical thermal model (VEM analysis). We performed the numerical modelling of a 200 mm high hollow core slab. We determined the excess heat input into the cavities and the temperature variation of the steel inserts with iteration method. We are of the opinion that the fire resistance limit of this support cannot be solved by changing the concrete composition alone, therefore we propose to modify the geometry.
Fire behaviour of hollow core slabs
https://orcid.org/0000-0001-8373-7291
https://orcid.org/0000-0002-0369-8972
Abstract The objective of our research was to develop an optimum concrete mix for fire resistance, that is usable for hollow core slab prefabrication. Small-scale and full-scale tests were done, and the results were used to calibrate a numerical model that can be used to determine the temperature and load capacity reduction of steel reinforcement. With the help of the calibrated model, the effects of geometric variables were examined. The thickness of the ridge between the cavities has no effect on the change in the maximum temperature of the protected side in the examined 30-minute range, but the minimum temperature decreased.
Highlights The objective of our research was to develop an optimum concrete mix for fire resistance, that is usable for hollow core slab prefabrication. We performed two tests. In the first test, the fire resistance of the slab is REI 60 for operational loads and REI 90 for industrial loads (max. 5 kN/m2). In the second test, the slab fire resistance at service load was REI 15. During the research, we created a method with a spatial numerical thermal model (VEM analysis). We performed the numerical modelling of a 200 mm high hollow core slab. We determined the excess heat input into the cavities and the temperature variation of the steel inserts with iteration method. We are of the opinion that the fire resistance limit of this support cannot be solved by changing the concrete composition alone, therefore we propose to modify the geometry.
Fire behaviour of hollow core slabs
https://orcid.org/0000-0001-8373-7291
https://orcid.org/0000-0002-0369-8972
Abstract The objective of our research was to develop an optimum concrete mix for fire resistance, that is usable for hollow core slab prefabrication. Small-scale and full-scale tests were done, and the results were used to calibrate a numerical model that can be used to determine the temperature and load capacity reduction of steel reinforcement. With the help of the calibrated model, the effects of geometric variables were examined. The thickness of the ridge between the cavities has no effect on the change in the maximum temperature of the protected side in the examined 30-minute range, but the minimum temperature decreased.
Highlights The objective of our research was to develop an optimum concrete mix for fire resistance, that is usable for hollow core slab prefabrication. We performed two tests. In the first test, the fire resistance of the slab is REI 60 for operational loads and REI 90 for industrial loads (max. 5 kN/m2). In the second test, the slab fire resistance at service load was REI 15. During the research, we created a method with a spatial numerical thermal model (VEM analysis). We performed the numerical modelling of a 200 mm high hollow core slab. We determined the excess heat input into the cavities and the temperature variation of the steel inserts with iteration method. We are of the opinion that the fire resistance limit of this support cannot be solved by changing the concrete composition alone, therefore we propose to modify the geometry.
Fire behaviour of hollow core slabs
Hlavička, Viktor (Autor:in) / Biró, András (Autor:in) / Tóth, Brigitta (Autor:in) / Lublóy, Éva (Autor:in)
07.11.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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