Fire Resistance of a Prestressed Concrete Floor Panel CONCRETE FLOOR PANEL-.

10.14359/8085 ◽  
1959 ◽  
Vol 56 (8) ◽  
Keyword(s):  
Fire Resistance ◽  
Prestressed Concrete ◽  
Concrete Floor ◽  
Floor Panel

scholarly journals Optimal design of prestressed concrete hollow core slabs taking into account its fire resistance

2018 ◽  
Vol 122 ◽  
pp. 81-92 ◽  
Author(s):  
V. Albero ◽  
H. Saura ◽  
A. Hospitaler ◽  
J.M. Montalvà ◽  
Manuel L. Romero
Keyword(s):  
Optimal Design ◽  
Fire Resistance ◽  
Prestressed Concrete ◽  
Hollow Core

Influence of the Fire Temperature Regime on the Fire-Retardant Ability of Reinforced-Concrete Floors Coating

2020 ◽  
Vol 1006 ◽  
pp. 87-92
Author(s):  
Andrii Kovalov ◽  
Yurii Otrosh ◽  
Oleg Semkiv ◽  
Volodymyr Konoval ◽  
Oleksandr Chernenko
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Temperature Regime ◽  
Fire Retardant ◽  
Protective Layer ◽  
Fire Regimes ◽  
Hollow Core ◽  
Standard Temperature ◽  
Concrete Floor

In the paper, the tests have been analysed for fire-resistant quality of the hollow-core reinforced-concrete floors with fire-retardant plaster covering under standard temperature regime of the fire. Using the methodology for determining the characteristics of fire-retardant coatings ability for reinforced-concrete floors, the dependences have been obtained of the fire-retardant coating thickness from the concrete protective layer of a hollow-core reinforced-concrete floor for a fire resistance limit of 180 minutes with a temperature regime of hydrocarbon fire and a tunnel curve according to the Netherlands standards (RWS). It has been concluded about the minimum required thickness of the studied fire-retardant coating to provide the required fire resistance limit of a hollow-core reinforced-concrete floor under the indicated fire regimes.

Performance of prestressed concrete box bridge girders under hydrocarbon fire exposure

2020 ◽  
Vol 23 (8) ◽  
pp. 1521-1533 ◽  
Author(s):  
Chaojie Song ◽  
Gang Zhang ◽  
Wei Hou ◽  
Shuanhai He
Keyword(s):  
Fire Resistance ◽  
Prestressed Concrete ◽  
Load Level ◽  
Concrete Cover ◽  
Bridge Girders ◽  
Fire Exposure ◽  
Bridge Girder ◽  
Prestressing Strands ◽  
Cover Thickness ◽  
Exposure Length

This article presents an approach for investigating performance of prestressed concrete box bridge girders under hydrocarbon fire exposure. A three-dimensional nonlinear finite element model, developed in computer program ANSYS, is utilized to analyze the response of prestressed concrete box bridge girders under combined effects of fire exposure duration and simultaneous structural loading. The model validation is performed using a scaled prestressed concrete box girder exposed to ISO834 fire in furnace. Subsequently, the validated model is used to investigate fire performance of prestressed concrete box bridge girders through taking into consideration some variables, namely concrete cover thickness to prestressing strands, prestress degree, load level, fire exposure length, and position. Through a case study, results from numerical analysis show that concrete cover thickness to prestressing strands and load level has significant effect on fire resistance of prestressed concrete box bridge girders. Increasing prestress degree in prestressing strands can speed up the progression of deflection (sudden collapse) in prestressed concrete box bridge girder toward the final fire exposure stage. Reducing fire exposure length or preventing fire exposure on mid-span zone can highly enhance the fire resistance of simply supported prestressed concrete box bridge girders. Failure of prestressed concrete box bridge girder, under hydrocarbon fire exposure conditions, is governed by rate of deflection failure criterion in particular cases.

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