Finite Element Modeling for RC Hollow Columns Wrapped with FRP Laminates

Abstract:

A finite element reinforced concrete model has been analyzed by the author with Ansys v.9 finite element program for both unstrengthened and CFRP-strengthened hollow columns using solid65 concrete element, its size 24x26x24 mm and Link8 discrete steel distribution element. The CFRP has been modeled using Solid46 element, which has orthotropic properties. The deflection results have been compared with an experimental and other finite element model which are performed by Lignola [6], in which using Tno Diana v. 9.1 finite element program for modeling concrete using three-dimensional solid brick element type Chx60, steel using embedded reinforcement truss element and CFRP using three-node plane bonded element. These results show that the author's model is much better than the Lignola's [6] model comparing with the experimental one. A parametric study has been done on the proposed model for obtaining the effect of using the GFRP instead of the CFRP in column strengthening by comparing the failure loads and the concrete and steel properties at failure. This study show a reduction in the failure load values by an amount 0.6 to 2.8% when using GFRP, indicating that the CFRP is more preferable in strengthening of the hollow column than the GFRP.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 3347-3353
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.3347
• Online since: July 2011
• Authors: Ashraf Mohamed Mahmoud
• Keywords: ANSYS-9, Carbon and Glass Fiber-Reinforced Polymer, Eccentric-Loaded, Experimental, Ansys-9, Finite Element Model (FEM), Hollow Column, Reinforced Concrete (RC)

References

[1] Pavese A, Bolognini D and Peloso S.: FRP Seismic retrofit of RC square hollow section bridge piers, Journal of earthquake engineering, Special issue, 1(8), pp.225-250, (2004).

DOI: 10.1080/13632460409350526

[2] Yeh Y. -K. and Mo Y.L.: Shear Retrofit of Hollow bridge Piers with Carbon Fiber-Reinforced Polymer sheets, Journal of Composite forConstruction, 9(4), pp.327-336, (2005).

DOI: 10.1061/(asce)1090-0268(2005)9:4(327)

[3] Osada K., Yamagughi T. and Ikeda S.: Seismic performance and the retrofit of hollow circular reinforced concrete piers having reinforcement cut-off planes and variable wall thickness, In transactions, The Japan Concrete Institute, 21, (1999).

DOI: 10.3151/crt1990.10.1_13

[4] Masukawa J., Suda K. and Maekawa K.: Predicting post-peak behavior of high bridge pier with hollow section using a new model for spalling of cover concrete and buckling of reinforcement, 12th World Conference on Earthquake Engineering, CD-ROM: Paper No. 1869, (2000).

[5] Mo Y.L., Jeng C.H. and Perng S.F.: Seismic shear behavior of rectangular hollow bridge columns, Structural Engineering and Mechanics, 12(4), pp.429-448, (2001).

DOI: 10.12989/sem.2001.12.4.429

[6] Lignola G., P.: RC hollow members confined with FRP: Experimental behavior and numerical modeling, PH. D thesis, University of Napoli, Naples, Italy, (2006).

[7] Abdel-Fattah, N. M.: Behavior of reinforced concrete beams strengthed with external fiber reinforced polymer (FRP) materials, M. Sc. thesis, Faculty of Engineering, Ain Shams University, Cairo, Egypt, (2008).

DOI: 10.35940/ijeat.f9274.088619

[8] Damian Kachlakev, Thomas Miller, Solomon Yim and Kasidit Chansawat: Finite Element Modeling of Reinforced Concrete Structures Strengthened with FRP Laminates, California Polytechnic State University, San Luis Obispo, CA and Oregon State University, Corvallis, OR for Oregon Department of Transportation, (2001).

DOI: 10.31979/mti.2023.2153