fire performance of reinforced concrete slabs

Fire Performance of Reinforced Concrete Slabs

on the fire performance of concrete slabs in standard and natural fires. The results were compared with published test data and finite element software simulations to benchmark the accuracy of the proposed tool. Furthermore, methods for the design of reinforced concrete slabs in fire conditions are presented.

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Performance of reinforced concrete slabs under hydrocarbon ...

Jul 01, 2018  The fire resistance provisions requirements for slabs (concrete cover) in the current codes of practice are based on standard fire scenarios, such as ASTM E119 and ISO834 fire exposure. These cover provisions may not be conservative for slabs designed to achieve a 90 min of fire resistance under hydrocarbon fire exposure.

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Performance of Reinforced Concrete Flat Slabs Exposed to Fire

A number of researchers have focused on the performance of reinforced concrete slabs exposed to fire. These studies have shown that the membrane forces and the redistribution of bending moments in the slabs considerably affected the behaviour of the slabs in fire conditions.

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Assessment of reinforced concrete slabs post-fire performance

Jan 01, 2020  For a 120-min fire at both sides of the slab, the stiffness decrease ranges from 35 to 50% for slabs with reinforcement ratio ρ = 0.25% and by 45–65% for ρ = 1% (see Fig. 18 b). The figure shows that slabs with thicker depths suffer lower decrease of their pre-fire flexural stiffness (and vice versa, as

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Fire Performance of Reinforced Concrete Slabs - CORE

Research on concrete has been more focused on material properties rather than structural performance. This thesis presents a simplified design tool which assesses the fire performance of reinforced concrete. An Excel-based spreadsheet application was developed for thermal analysis of concrete slabs.

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Assessment of reinforced concrete slabs post-fire performance

Jan 01, 2020  For a 120-min fire at both sides of the slab, the stiffness decrease ranges from 35 to 50% for slabs with reinforcement ratio ρ = 0.25% and by 45–65% for ρ = 1% (see Fig. 18 b). The figure shows that slabs with thicker depths suffer lower decrease of their pre-fire flexural stiffness (and vice versa, as

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Performance of Reinforced Concrete Flat Slabs Exposed to

A number of researchers have focused on the performance of reinforced concrete slabs exposed to fire. These studies have shown that the membrane forces and the redistribution of bending moments in the slabs considerably affected the behaviour of the slabs in fire conditions.

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An Investigation on Fire Performance of FRP

performance of FRP-strengthened reinforced concrete beam-slabs exposed to fire. With such experimental results, fireproofing materials have the potential to earn standard performance ratings, which are essential to the design engineer and necessary for the continued increase of

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Performance of Reinforced Concrete Flat Slabs Exposed to Fire

Abstract. A number of researchers have focused on the performance of reinforced concrete slabs exposed to fire. These studies have shown that the membrane forces and the redistribution of bending moments in the slabs considerably affected the behaviour of the slabs in fire conditions.

get price

Effects of Fire on the Strength of Reinforced Concrete ...

2.4. Cooling of Concrete Samples. The burning /cooling involved 8 reinforced concrete (RC) beams (230 x 230 x 800 mm) samples, 8 RC slabs (300 x 600 x100 mm) and 8 mass concrete (150 x 150 x 150mm) cubes out of which, two each were control specimen, two were air cooled, two were quenched with water and two cooled with Carbon Dioxide fire extinguishers found in households BS EN FIRE

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Behavior of one-way reinforced concrete slabs subjected to ...

Dec 01, 2013  To study the performance of reinforced concrete slab under fire, the distribution of temperature inside the slab has to be known. The assessment of the slab behavior under fire should start by applying the standard fire temperature on the exposed surface, after that prediction of the temperature through the slab is obtained.

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GFRP-Reinforced Concrete Slabs: Fire Resistance and Design ...

Apr 02, 2019  This paper investigates the fire resistance of two full-scale GFRP-RC slabs with only 40 mm of clear concrete cover and 200 mm of unexposed (cool) anchor zone at the ends. Both slabs endured 3 h under the standard fire. The slabs were loaded with a sustained load, which caused a moment equal to 45% of their ultimate flexural strength.

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BEHAVIOUR OF REINFORCED CONCRETE STRUCTURES IN FIRE

Concrete layers Reference plane Slab node Fig. 1 – Division of reinforced concrete structure into beam and slab elements. In this program a non-linear layered finite element procedure has been developed for predicting the structural response of reinforced concrete slabs subjected to fire 9,

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Fire and Concrete Structures - Cement

Figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete slab. If the bottom side of the slab is subjected to fire, the strength of the concrete and the reinforcing steel will decrease as the temperature increase. However, it can take up to three hours for the

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Fire Resistance Ratings of Concrete and Masonry Structures

Fig.4: Influence of slab thickness and aggregate type of fire resistance for concrete slabs based on 139 o C rise in temperature of unexposed surface Sandwich Panels: E quation-6 is used to compute the fire resistance of precast concrete wall panels constructed from two layer of concrete between which a layer of foam plastic is sandwiched.

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Modeling Cracks of Reinforced Concrete Slabs under Fire ...

Modeling Reinforced Concrete Slabs in Fire. For validating the current model, four fire tests of RC slabs were modeled. These fire tests on RC slabs conducted by Bailey and Toh were carried out under a transient heating state with a uniform working load (P) applied on the top surface of the slab. The applied load remained constant during the ...

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Evaluation of Fire Endurance of Concrete Slabs Reinforced ...

Jul 25, 2003  A higher fire resistance for FRP-reinforced concrete slabs can be obtained through greater concrete cover thickness and through the use of carbonate aggregate concrete. Based on the parametric studies, a series of simple design charts is presented that can be used to evaluate the fire endurance of FRP-reinforced concrete slabs.

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Fire resistance - concretecentre

Fire performance is the ability of a particular structural element (as opposed to any particular building material) to fulfil its designed function for a period of time in the event of a fire. Concrete proof. The impact of a major fire at Tytherington County High School, Cheshire, was limited due to the fire resistance of the concrete structure.

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Flexural performance of fire damaged and rehabilitated two ...

Jun 25, 2012  Five two-span reinforced concrete (RC) slabs and seven two-span RC beams were tested under the ISO 834 standard fire with different durations. CFRP strengthening was then applied to some of the specimens after the damaged concrete was removed from the specimens and replaced with polymer mortar. All the specimens were loaded to failure to investigate the influence of fire-damage

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An Investigation on Fire Performance of FRP

performance of FRP-strengthened reinforced concrete beam-slabs exposed to fire. With such experimental results, fireproofing materials have the potential to earn standard performance ratings, which are essential to the design engineer and necessary for the continued increase of

get price

Performance of Reinforced Concrete Flat Slabs Exposed to Fire

Abstract. A number of researchers have focused on the performance of reinforced concrete slabs exposed to fire. These studies have shown that the membrane forces and the redistribution of bending moments in the slabs considerably affected the behaviour of the slabs in fire conditions.

get price

Effects of Fire on the Strength of Reinforced Concrete ...

2.4. Cooling of Concrete Samples. The burning /cooling involved 8 reinforced concrete (RC) beams (230 x 230 x 800 mm) samples, 8 RC slabs (300 x 600 x100 mm) and 8 mass concrete (150 x 150 x 150mm) cubes out of which, two each were control specimen, two were air cooled, two were quenched with water and two cooled with Carbon Dioxide fire extinguishers found in households BS EN FIRE

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GFRP-Reinforced Concrete Slabs: Fire Resistance and Design ...

Apr 02, 2019  This paper investigates the fire resistance of two full-scale GFRP-RC slabs with only 40 mm of clear concrete cover and 200 mm of unexposed (cool) anchor zone at the ends. Both slabs endured 3 h under the standard fire. The slabs were loaded with a sustained load, which caused a moment equal to 45% of their ultimate flexural strength.

get price

Evaluation of Fire Endurance of Concrete Slabs Reinforced ...

Jul 25, 2003  A higher fire resistance for FRP-reinforced concrete slabs can be obtained through greater concrete cover thickness and through the use of carbonate aggregate concrete. Based on the parametric studies, a series of simple design charts is presented that can be used to evaluate the fire endurance of FRP-reinforced concrete slabs.

get price

Fire and Concrete Structures - Cement

Figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete slab. If the bottom side of the slab is subjected to fire, the strength of the concrete and the reinforcing steel will decrease as the temperature increase. However, it can take up to three hours for the

get price

Fire performance of earthquake-damaged reinforced-concrete ...

Aug 27, 2015  A full-scale reinforced-concrete (RC) three-dimensional (3-D) frame under vertical sustained loads has been subjected to biaxial lateral loads representing earthquake actions followed by a pool fire in a single compartment. A number of sensors were used to monitor the kinematic and thermal fields during the test. The results (strains, displacements and temperatures) provide valuable ...

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Modeling Cracks of Reinforced Concrete Slabs under Fire ...

Modeling Reinforced Concrete Slabs in Fire. For validating the current model, four fire tests of RC slabs were modeled. These fire tests on RC slabs conducted by Bailey and Toh were carried out under a transient heating state with a uniform working load (P) applied on the top surface of the slab. The applied load remained constant during the ...

get price

Flexural performance of fire damaged and rehabilitated two ...

Jun 25, 2012  Five two-span reinforced concrete (RC) slabs and seven two-span RC beams were tested under the ISO 834 standard fire with different durations. CFRP strengthening was then applied to some of the specimens after the damaged concrete was removed from the specimens and replaced with polymer mortar. All the specimens were loaded to failure to investigate the influence of fire-damage

get price

Fire Resistance Ratings of Concrete and Masonry Structures

Fig.4: Influence of slab thickness and aggregate type of fire resistance for concrete slabs based on 139 o C rise in temperature of unexposed surface Sandwich Panels: E quation-6 is used to compute the fire resistance of precast concrete wall panels constructed from two layer of concrete between which a layer of foam plastic is sandwiched.

get price

Assessing the fire performance of existing reinforced ...

Mar 27, 2012  Concrete in fire. Tabulated data for reinforced concrete floors. Alternative forms of construction - Hollow pot floors - Wood wool slabs - Other proprietary systems. Methods to enhance the fire resistance of existing floor systems. Conclusions . A4 12pp. Available on or

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Numerical modelling of two-way reinforced concrete slabs ...

FIRE TESTS The performance of the shell element with concrete properties in fire conditions has been validated by modelling two-way slabs in fire conditions. The results of fire tests of two-way slabs, carried out at BRANZ (Building Research Association of New Zealand) [14], are used for validation.

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Structural Performance of Reinforced Concrete Flat Plate ...

Jul 01, 2012  Three furnace tests of two-way reinforced concrete slabs performed by Lim and Wade are used to examine the definitions of concrete thermal properties specified in ASCE Manual No. 78 (referred to as ASCE in the following discussions for simplicity) and EC2 . All the specimens (D147, HD12, and 661) were 3.3 m wide, 4.3 m long, and 100 mm thick ...

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Effect of Fire on Reinforced Concrete Slab—Numerical ...

Aug 02, 2018  The study investigates the influence of cooling condition on concrete slab exposed to fire. The variables considered for the study are thickness of slab 125 mm, retention period of one-hour and four-hour, subjected to temperature of 300, 400 and 500 °C, and two types of cooling regimes like air cooling and quench cooling.

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