Influence of Concrete Cover on Fire Resistance of Reinforced Concrete Flexural Members

Shi, Xudong; Tan, Teng-Hooi; Tan, Ken Seng; Zhang, Guo

doi:10.1061/(asce)0733-9445(2004)130:8(1225)

Cited by 62 publications

(36 citation statements)

References 4 publications

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“…Therefore an attempt is made to study the effect of various parameters on RC slab subjected to fire. Most of the parameters that affect the behavior of RC structures under fire loading studied by researchers are based on experimental results or specially developed softwares [4,5]. In order to generalize the analysis, the present study is carried out using the commercial finite element (FE) software ANSYSÒ Release15 [13].…”

Section: Background and Research Significancementioning

confidence: 99%

“…Slabs are the structural members which prevent the propagation of fire from one compartment to the other. From the available literatures, it can be noticed that increase in concrete cover significantly improves the fire resistance [4,5]. Usually in framed structures, slabs act as a partition to transfer the live load to frames (beam -column assembly).…”

Section: Introductionmentioning

confidence: 99%

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Predicting the response of reinforced concrete slab exposed to fire and validation with IS456 (2000) and Eurocode 2 (2004) provisions

Balaji

Nagarajan

Pillai

2016

Alexandria Engineering Journal

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The current provisions for fire rating of reinforced concrete slab as per Indian Standard code IS456 (2000) are based on minimum width and cover to reinforcement. The influence of various parameters is not accounted in the code provisions. This paper presents a three-dimensional nonlinear finite element analysis for evaluating the fire response of reinforced concrete slabs using the FE model. The numerical analysis results are not conservative with the specified fire rating provided in IS456 (2000) and Eurocode 2 (2004). Several two-way slabs are modeled to quantify the effect of various parameters and their influence on fire rating based on different failure criteria. The analyses show that the parameters considered in the present study have significant influence on the fire rating. The fire rating of slabs with various end restraints specified in IS456 (2000) for design calculation at ambient temperature is also evaluated. Ó 2016 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Background and Research Significancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicting the response of reinforced concrete slab exposed to fire and validation with IS456 (2000) and Eurocode 2 (2004) provisions

Balaji

Nagarajan

Pillai

2016

Alexandria Engineering Journal

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“…The influence of the concrete cover on the fire resistance of reinforced flexural elements has been examined in his study [26]. The mechanical properties of concrete cover of reinforced concrete elements exposed to elevated temperatures and cover effect have been studied by scientists [27,28]. However, limited studies have been carried out related to rebar in mortar exposed to fire.…”

Section: Introductionmentioning

confidence: 99%

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

2010

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SUMMARYConcrete protects the steel inside against several effects of the external environment. One of the most important of these effects is high temperature. Cover plays a critical role in concrete's protection on reinforcement against high temperature. In this study, the changes after high temperatures in mechanical properties of the reinforcement steels placed between 3 and 5 cm covers inside the mortar specimen prepared with CEM I 42.5 R and CEM II/B-M (P-L) 32.5 R cements were investigated. In order to ensure 3 and 5 cm covers 76×76×310 and 116×116×350 mm sized reinforced mortar specimen were prepared. These reinforced mortar specimens were exposed to 20, 100, 200, 300, 500 and 800 • C temperatures and after that on the steels taken out of these mortar specimen tensile strength, tests were applied in order to determine the mechanical properties. With the tensile strength tests performed stress-strain curves of the steel bars exposed to several temperatures were drawn. Besides, the yield and ultimate strengths of the steel bars were determined. The results of the study have shown that the larger the covers, the better the steel bars are protected against high temperatures.

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“…The temperature corresponding to the member failure must, among other factors, be dependent on the loading type and load level [22]. As specified in American Society for Testing and Materials [2], the fire endurance of a RC beam has been traditionally defined based on thermal and strength failure criteria as specified in American Society for Testing and Materials [2].…”

Section: Size Effect On the Fire Endurance Of Simple Flexural Beamsmentioning

confidence: 99%

Size effect on fire resistance of structural concrete

Reddy

Sobhan

Liu

et al. 2015

Engineering Structures

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Influence of Concrete Cover on Fire Resistance of Reinforced Concrete Flexural Members

Cited by 62 publications

References 4 publications

Predicting the response of reinforced concrete slab exposed to fire and validation with IS456 (2000) and Eurocode 2 (2004) provisions

Predicting the response of reinforced concrete slab exposed to fire and validation with IS456 (2000) and Eurocode 2 (2004) provisions

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

Size effect on fire resistance of structural concrete

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