STRUCTURAL BEHAVIOR OF GFRP-CONCRETE COMPOSITE COLUMNS UNDER AXIAL LOAD
Main Article Content
Abstract
Glass Fiber Reinforced Polymer (GFRP) is emerging as an effective alternative to traditional steel in construction due to its superior ability to withstand high loads, light weight, corrosion resistance and low maintenance costs. Optimizing the design of GFRP I-section can lead to significant savings construction costs. The main objective of this study is to understand the effect of introducing GFRP I-section internally on the load bearing capacity of Reinforced Concrete (RC) columns with and without fire. Four RC-column specimens were tested with a square cross-section of 160 mm side dimension and 1540 mm height. I-shaped GFRP section with 5.5 mm thickness for web and flanges, 80 mm flange width, and 100 mm total height is fixed in the center of section of column specimens .The specimens are divided into two groups. The first group has two conventional RC tested column specimens which one exposed to the fire 500°C for 90 minutes and the other without fire. The second group has two RC columns specimens reinforced with GFRP I-section which one exposed to the fire 500°C for 90 minutes and the other without fire. This study has shown that GFRP I-section composite columns exhibit excellent strength and high resistance to axial load than the conventional reinforced concrete columns. The maximum bearing capacity for the composite columns with (GFRP) I-section increased 17% more than the conventional RC columns. The maximum bearing capacity for the composite columns with (GFRP) I-section under the fire decreased 39% more than the composite (GFRP) columns without the fire, and decreased 14% more than the conventional RC columns. By different codes the theoretical axial load is calculated for tested specimens. The Finite element analysis was used to verify experimental results for studying additional parameters are the effect of concrete compressive strength, the steel yield strength, the reinforcement ratio, and the GFRP plate and I-section ratio of RC composite columns.
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
References
Hadi M., Youssef J. Experimental Investigation of GFRP-Reinforced and GFRP-Encased Square Concrete Specimens under Axial and Eccentric Load, and Four-Point Bending Test // Journal of Composites for Construction, 2016.
Jing C., Zhao L., Wu T., Li. Experimental and Numerical Simulation of Reinforced Concrete-Filled Square GFRP Tubular Columns under Axial Compression // Materials 17, 2024, 2595.
Hadi M., Wang W., Sheikh M. Axial compressive behavior of GFRP tube reinforced concrete columns // Construction and Building Materials 81, 2015, 198-207.
Tomblin J., Barbero E. Local buckling experiments on FRP columns // Thin Walled Sruct. 18(2), 1994, 97-116.
Harvey J. A reinforced plastic footbridge, Aberfeldy, UK // Structural Engineering International, 4/93, 2018, 229-232.
Robert L., Zouheir A., Short vs. Long column behavior of pultruted glass-fiber reinforced polymer composites // Construction and Building Materials 15, 2001, 369-378.
Lei X., Yu B., Yujun Q., Hao W. Pultruded GFRP Square Hollow Columns with Bolted Sleeve Joints under Eccentric Compression // https://www.elsevier.com/userlicense/1.0/, 2018.
Srinath T. Buckling and Bonding Behavior of Glass Fiber Reinforced Epoxy Resin Composite Column // International Journal of Electrical Engineering and Technology (IJEET), Vol. 11, 2020, 219-224.
Yunjun Q., Lei X., Yu B., Weiqing Liu., Hao W. Axial Compression Behaviors of Pultruted GFRP-Wood Composite Columns // www.mdpi.com, journal/sensors, 2019.
Aydin F. Effects of various temperatures on the mechanical strength of GFRP box profiles // Construction and Building Materials 127, 2016, 843-849.
OPCT. Fiberglass Products Company, 398 Kaiyuan Road, Jizhou District, Hengshui City, Hebei Province, China // www.Chopct.com.
Hassooni A., Zaidee S. Behavior and Strength of Composite Columns under the Impact of Uniaxial Compression Loading // Engineering Technology and Applied Science Research, Vol. 12, No. 4, 2022, 8843-8849.
Egyptian code for design and construction of reinforced concrete structures, Housing and Building National Research Center. Ministry of Housing, Utilities and Urban Planning, Giza, Egypt, ECP 203-2020.
British Standards Institution. Structural use of concrete, Part 1: code of practice for design and construction. British Standards Institution, London, BS811O - 1997.
ACI Committee. American Concrete Institute, & International Organization for Standardization, Building code requirements for structural concrete and commentary. American Concrete Institute (ACI 318-11).
European Standard. Design of concrete structures – part 1-1: General rules and rules for buildings. CEN, Brüssel, EN 1992-1-1, 2011.
CSA Code Canadian Standards Association for Design of Concrete Structures, Consolidated Mailing, Canada CSA. A23.3-04, 2004.
ANSYS. “ANSYS Help”, Release 19, Copyright 2012.
MacGregor G. Reinforced Concrete Mechanics and Design", Prentice-Hall, Inc., Englewood Cliffs, NJ, 1992.