The behaviour of steel frames subject to fire

Wang, Yongchang; Lennon, Tom; Moore, D.B.

doi:10.1016/0143-974x(94)00046-k

Cited by 73 publications

(26 citation statements)

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“…The experimental -2-findings were also complemented by numerical simulations and analytical investigations [e.g. [3][4][5][6] which provided additional understanding of the main behavioural characteristics. Importantly, the significant role played by the composite floor slab under fire conditions was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of the mechanical properties of steel reinforcement at elevated temperature

Elghazouli

Cashell

Izzuddin

2009

Fire Safety Journal

118

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This paper describes an experimental investigation into the influence of elevated temperatures on the mechanical properties of steel reinforcement. The study includes tests carried out under ambient temperature as well as steady-state and transient elevated temperature conditions. A complementary study, in which the residual post-cooling properties of reinforcing bars were examined, is also described. The tests focused on assessing the performance of 6 and 8 mm diameters, although 10 mm bars were also considered in some cases. The specimens included both plain and deformed bars. After providing an outline of the experimental set-up and loading procedures, a detailed account of the test results is presented and discussed. Apart from the evaluation of stress-strain response and the degradation of stiffness and strength properties, particular emphasis is given to assessing the influence of temperature on enhancing the ductility of reinforcement. The findings of this study have direct implications on procedures used for predicting the ultimate behaviour of structural floor elements and assemblages during, and following, exposure to elevated temperatures.

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Section: Introductionmentioning

confidence: 99%

Experimental evaluation of the mechanical properties of steel reinforcement at elevated temperature

Elghazouli

Cashell

Izzuddin

2009

Fire Safety Journal

118

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“…This member is under uniform load of q. Nonlinear behavior of the rotational spring obtained from m-Ɵ diagram from Yahyai and Saedi experiments for four kinds of bolt connections (5,13,3,9). Also, for linear elastic behavior of the linear spring, the lateral stiffness of the frame is considered.…”

Section: Problem Structure Theory Of Studymentioning

confidence: 99%

Investigating Durability Time Interval of Three-Dimensional Steel Frame With Angle Connections Under Elevated Temprature

Rad

Yahyayi

2016

Adv. Sci. Technol. Res. J.

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During recent years, much attention has been paid to the analysis of fire effect on steel structures because of fire importance and its effect on the stability of steel structures. Considering steel sensitivity to heat and high costs of steel frames retrofitting with the help of thermal covers, accurate behavior analysis of metal frames in elevated temperatures is required in order to reduce undesirable effects of temperature increase. To do so and taking into account the high costs of lab tests and their limitations in investigation of numerous parameters during any test, finite element method is used as a powerful and valuable tool in modeling of steel frames under thermal conditions. In this study, the fire effect on steel beams is studied considering the softening of connection and decrease of materials strength. Then, structure durability in fire will be analyzed in the ANSYS software. The analyzed frame is a single span three dimensional one and different conditions including connection type, longitudinal expansion effect, thermal loading and the kind of fire will be analyzed and compared. The obtained computer results will be compared with other researches results.

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“…Advanced numerical analysis allows less simplifications or assumptions for the description of material constitutive behavior, geometric modeling, real boundary conditions and loading, hence leading to a more realistic prediction of the stress/deformation in the studied engineering structure. For example, the deformation response prediction of steel-framed structures under fire conditions was done based on an elasto-plastic beam-column formulation [Liew 1998, Makelainen 1998]; The non-uniform profile of temperature across section of frame members was considered in [Li 1999]; The creep strain model was included in the simulation of steel frames in fire [Wang 1995]; Nonlinear analyses for three-dimensional steel frames in fire was presented in [Najjar 1996, Kuma 2004, but without taking into account the strain-rate sensitivity of the steel material at elevated temperature and nonlinear temperature distribution both across section of steel frames and along length of beam-column.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Viscoplastic Deformation of Low Carbon Steel Structures at Elevated Temperatures

Sun

Maciejewski

Ghonem

2011

J. of Materi Eng and Perform

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The deformation response of a low carbon structural steel subjected to high temperature simulating fire conditions is generated using a viscoplastic material constitutive model which acknowledges the evolution of the material hardening parameters during the loading history. The material model is implemented in an ABAQUS subroutine (UMAT) which requires the determination of the material constants as a function of temperature. Both the temperature dependency and strain-rate sensitivity of the material parameters have been examined by analysis of a single steel beam and a steel-framed structure subjected to temperatures ranging from 300 o C -700 o C . Sequentially coupled thermalstress analysis is applied to a structure under simulated fire condition. Results of this analysis show that above a transitional temperature, the deformation of the steel is strainrate dependent. The combined effect of heat flux and loading rate on the complex deformation of a two story steel structure is examined and the significance of employing a viscoplastic material model is discussed.

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The behaviour of steel frames subject to fire

Cited by 73 publications

References 0 publications

Experimental evaluation of the mechanical properties of steel reinforcement at elevated temperature

Experimental evaluation of the mechanical properties of steel reinforcement at elevated temperature

Investigating Durability Time Interval of Three-Dimensional Steel Frame With Angle Connections Under Elevated Temprature

Simulation of Viscoplastic Deformation of Low Carbon Steel Structures at Elevated Temperatures

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