Numerical study of the effect of FRP sheets on the cyclic behavior of concrete columns exposed to fire

Hashemi Amiri, Seyed Amir; Ghodrati Amiri, Gholamreza; Ghasemi Naghibdehi, Maysam; Afzalirad, Mobin

doi:10.22075/ijnaa.2022.27442.3605

Numerical study of the effect of FRP sheets on the cyclic behavior of concrete columns exposed to fire

Document Type : Research Paper

Authors

Seyed Amir Hashemi Amiri

Gholamreza Ghodrati Amiri

Maysam Ghasemi Naghibdehi

Mobin Afzalirad

Department of Civil Engineering Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran

10.22075/ijnaa.2022.27442.3605

Abstract

Despite the widespread and successful use of FRP sheets in improving the seismic behavior of structures, the effect of FRP sheets on the strength of structural members under lateral load (such as concrete columns), especially at high temperatures, has received less attention. Therefore, in this study, while making sure the accuracy of numerical simulations, then, by numerical modeling of three-dimensional finite element columns of reinforced concrete columns in both non-reinforced and reinforced conditions with CFRP sheets and thermal coupling-displacement analysis of this model during cyclic lateral loading at different fire temperatures, the effect of reinforcement of reinforced concrete columns with FRP sheets on the cyclic lateral behavior of these columns at different fire temperatures has been investigated. From the results of these studies, It has been observed that following the increase of fire temperature from 250 to 1000 ° C in both reinforced concrete columns and reinforced with FRP sheets, on the amount of lateral force, anchorage and energy of these columns during lateral loading of the cycle, the amount of lateral force, anchorage and energy of these columns during cyclic lateral bearing has been increased, which this increase (as the result of the increase in fire temperature) of the mentioned responses in the columns is more significant than the temperature of 500 ° C and especially in the reinforced concrete columns reinforced with FRP sheets.

Keywords

Reinforced concrete column

FRP sheets

Fire heat

Cyclic loading

Finite element method

Abaqus software

[1] ISO 834-1, Fire-resistance tests-elements of building construction, Part 1: General requirements, ISO 834-1, Int. Organ. Stand. (1999).

[2] Abaqus, Abaqus user manual, Version 6.11-1 (2011).

[3] M. Adelzadeh, H. Hajiloo, and M.F. Green, Numerical study of FRP reinforced concrete slabs at elevated temperature, Polymers 6 (2014), no. 2, 408–422.

[4] W.I. Alnahhal, M. Chiewanichakorn, A.J. Aref, and S. Alampalli, Temporal thermal behavior and damage simulations of FRP deck, J. Bridge Engin. 11 (2006), no. 4, 452–464.

[5] ACI Committee, Building code requirements for structural concrete (ACI 318-08) and commentary, American Concrete Institute, 1998.

[6] D.C. Drucker and W. Prager, Soil mechanics and plastic analysis or limit design, Quart. Appl. Math. 10 (1952), no. 2, 157–165.

[7] M. Gillie, Temperature modeling for concrete-filled steel tube’s cross section in fire, Int. Conf. Mech. Civil Engin. (icmce-14), Atlantis Press, 2014, pp. 936–941.

[8] M. Haji, H. Naderpour, and A. Kheyroddin, Experimental study on influence of proposed FRP-strengthening techniques on RC circular short columns considering different types of damage index, Compos. Struct. 209 (2019), 112–128.

[9] D.C. Kent and R. Park, Flexural members with confined concrete, J. Struct. Div. 97 (1971), no. 7, 1969–1990.

[10] V.K.R. Kodur, Performance of high strength concrete-filled steel columns exposed to fire, Canad. J. Civil Engin. 25 (1998), no. 6, 975–981.

[11] C.-H. Lin, K.-C. Tsai, B. Qu, and M. Bruneau, Sub-structural pseudo-dynamic performance of two full-scale two-story steel plate shear walls, J. Construct. Steel Res. 66 (2010), no. 12, 1467–1482.

[12] J. Lubliner, J. Oliver, S. Oller, and E. Onate, A plastic-damage model for concrete, Int. J. Solids Struct. 25 (1989), no. 3, 299–326.

[13] R. Park and T. Paulay, Reinforced Concrete Structures, John Wiley & Sons, 1975.

[14] F.M. Rodrigues and A.L. Moreno, Temperature field of concrete-filled steel tubular columns in fire, REM-Int. Engin. J. 70 (2017), 137–147.

[15] J. Wang, Q. Shen, F. Wang, and W. Wang, Experimental and analytical studies on CFRP strengthened circular thin-walled CFST stub columns under eccentric compression, Thin-Walled Struct. 127 (2018), 102–119.