Modeling the behavior of load bearing concrete walls under fire exposure

Abstract A generic three-dimensional (3D) finite element (FE) based numerical model is presented for predicting thermo-mechanical behavior of load bearing reinforced concrete (RC) walls exposed to fire. The proposed model is capable of accounting for critical parameters governing fire resistance of RC walls including wall slenderness ratio, support restrains, and temperature dependent properties of reinforcement and concrete. The model is validated by comparing predicted thermal and structural response parameters with the experimental data on three full scale load bearing RC walls tested under fire exposure. The comparisons show good correlation between model predictions and measured data, indicating that the proposed model can predict the thermo-mechanical behavior of RC walls from pre-loading to collapse stage under fire exposure. The validated model can be applied to undertake parametric studies aimed at quantifying critical factors governing fire performance of load bearing RC walls under fire.

[1]  Jen-Hao Chi,et al.  Fire-resistance property of reinforced lightweight aggregate concrete wall , 2012 .

[2]  A. H. Buchanan,et al.  Fire Resistance Of Load- Bearing Reinforced Concrete Walls , 1991 .

[3]  Tuan Ngo,et al.  Testing of Normal- and High-Strength Concrete Walls Subjected to Both Standard and Hydrocarbon Fires , 2013 .

[4]  Hyun Kim,et al.  Experimental observations on reinforced concrete bearing walls subjected to all-sided fire exposure , 2013 .

[5]  E. P. Warnke,et al.  CONSTITUTIVE MODEL FOR THE TRIAXIAL BEHAVIOR OF CONCRETE , 1975 .

[6]  Maged A. Youssef,et al.  Assessing the flexural and axial behaviour of reinforced concrete members at elevated temperatures using sectional analysis , 2009 .

[7]  Yahya C. Kurama,et al.  Out-of-Plane Behavior and Stability of Five Planar Reinforced Concrete Bearing Wall Specimens under Fire , 2015 .

[8]  Chin-Hyung Lee,et al.  Fire resistance of reinforced concrete bearing walls subjected to all-sided fire exposure , 2013 .

[9]  I. D. Bennetts,et al.  Modelling of concrete walls in fire , 1991 .

[10]  Venkatesh Kodur,et al.  Properties of Concrete at Elevated Temperatures , 2014 .

[11]  Yahya C. Kurama,et al.  Out-of-Plane Behavior of Two Reinforced Concrete Bearing Walls under Fire: A Full-Scale Experimental Investigation , 2014 .

[12]  Patrick de Buhan,et al.  Yield design-based analysis of high rise concrete walls subjected to fire loading conditions , 2015 .

[13]  Venkatesh Kodur,et al.  Effect of Wall Thickness on Thermal Behaviors of RC Walls Under Fire Conditions , 2016 .

[14]  Venkatesh Kodur,et al.  Hydrothermal model for predicting fire-induced spalling in concrete structural systems , 2009 .

[15]  Sam Fragomeni,et al.  Spalling of normal strength concrete walls in fire , 2010 .

[16]  Jay G. Sanjayan,et al.  Tests of Load-Bearing Slender Reinforced Concrete Walls in Fire , 2000 .

[17]  Venkatesh Kodur,et al.  High-temperature properties of concrete for fire resistance modeling of structures , 2008 .

[18]  Jack P. Moehle,et al.  "BUILDING CODE REQUIREMENTS FOR STRUCTURAL CONCRETE (ACI 318-11) AND COMMENTARY" , 2011 .