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Erschienen in:

07.11.2022

Calculation Method of the Residual Bearing Capacities of Concrete T-Shaped Beams Considering the Effect of Fire Cracks

verfasst von: Cai Wei Liu, Jia Yuan Mao, Kun Dong, Ji Jun Miao, Zhen Jian Gu, Ling Hui Li

Erschienen in: Fire Technology | Ausgabe 2/2023

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Abstract

To obtain an accurate estimation of the residual bearing capacities of concrete T-shaped beams after fire exposure, a calculation method combined the finite element (FE) thermal simulation and analytical equilibrium equation was established on a basis of an experimental study of fire (high-temperature) exposure. The effect of the concrete crack size under fire exposure on the post-fire residual bearing capacity was carefully considered in the calculation method. The influences of the load ratio, reinforcement ratio, height-to-width ratio and concrete cover thickness on the residual bearing capacity of a concrete beam after fire exposure were studied, and then a calculation formula for predicting the residual bearing capacity of a concrete T-shaped beam considering fire cracks was proposed according to these influencing factors. The results show that the height-to-width ratio and the reinforcement ratio have a great influence on the residual bearing capacity of the T-shaped beam after fire exposure; these ratios are positively correlated with the residual bearing capacity. The load ratio of the T-shaped beam also has a great influence on the residual bearing capacity of the beam after fire exposure; this ratio is negatively correlated with the residual bearing capacity. The thickness of the concrete cover has little effect on the residual bearing capacity. Compared with that of the finite element simulation results, the calculation accuracy of the residual bearing capacity formula after fire exposure is satisfactory; thus, this work can provide a reference for the calculation of the residual bearing capacity of concrete T-shaped beams after fire exposure.

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Literatur
6.
Zurück zum Zitat El-Hawary MM, Ragab AM, El-Azim AA (1996) Effect of fire on flexural behaviour of R.C. beams. Constr Build Mater 10(2):147–150CrossRef El-Hawary MM, Ragab AM, El-Azim AA (1996) Effect of fire on flexural behaviour of R.C. beams. Constr Build Mater 10(2):147–150CrossRef
13.
Zurück zum Zitat ABAQUS (2014) Version 6.14.4 documentation. Providence (RI): Dassault Systemes Simulia Corp. ABAQUS (2014) Version 6.14.4 documentation. Providence (RI): Dassault Systemes Simulia Corp.
14.
Zurück zum Zitat ISO 834–1 (1999) Fire resistance tests-elements of building construction. Part 1: General requirement. Geneva, Switzerland. ISO 834–1 (1999) Fire resistance tests-elements of building construction. Part 1: General requirement. Geneva, Switzerland.
15.
Zurück zum Zitat Lie TT, Celikkol B (1991) Method to calculate the fire resistance of circular reinforced concrete columns. ACI Mater J 81(1):84–91 Lie TT, Celikkol B (1991) Method to calculate the fire resistance of circular reinforced concrete columns. ACI Mater J 81(1):84–91
16.
Zurück zum Zitat EN 1992–1–2 (2004) Eurocode 2 design of concrete structures, part 1–2: general rules-structural fire design. European Committee for Standardization. EN 1992–1–2 (2004) Eurocode 2 design of concrete structures, part 1–2: general rules-structural fire design. European Committee for Standardization.
19.
Zurück zum Zitat Zhu Y (2009) Study on fire resistance of concrete beams with CFRP bars considering crack effect. Master’s Degree Thesis, Harbin Institute of Technology [in Chinese] Zhu Y (2009) Study on fire resistance of concrete beams with CFRP bars considering crack effect. Master’s Degree Thesis, Harbin Institute of Technology [in Chinese]
24.
Zurück zum Zitat EN 1994–1–2 (2005) Eurocode 4 design of composite steel and concrete structures. Part 1–2: general rules-structural fire design. European Committee for Standardization. EN 1994–1–2 (2005) Eurocode 4 design of composite steel and concrete structures. Part 1–2: general rules-structural fire design. European Committee for Standardization.
25.
Zurück zum Zitat IBM SPSS Statistics version 22 (IBM SPSS Inc., Chicago, USA) IBM SPSS Statistics version 22 (IBM SPSS Inc., Chicago, USA)
26.
Zurück zum Zitat Molkens T, Van Coile R, Gernay T (2017) Assessment of damage and residual load bearing capacity of a concrete slab after fire: applied reliability-based methodology. Eng Struct 150:969–985CrossRef Molkens T, Van Coile R, Gernay T (2017) Assessment of damage and residual load bearing capacity of a concrete slab after fire: applied reliability-based methodology. Eng Struct 150:969–985CrossRef
Metadaten
Titel
Calculation Method of the Residual Bearing Capacities of Concrete T-Shaped Beams Considering the Effect of Fire Cracks
verfasst von
Cai Wei Liu
Jia Yuan Mao
Kun Dong
Ji Jun Miao
Zhen Jian Gu
Ling Hui Li
Publikationsdatum
07.11.2022
Verlag
Springer US
Erschienen in
Fire Technology / Ausgabe 2/2023
Print ISSN: 0015-2684
Elektronische ISSN: 1572-8099
DOI
https://doi.org/10.1007/s10694-022-01324-0

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