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Abstract

Fiber-reinforced plastic (FRP) tube-encased concrete columns (FRP/ECCs) represent a formwork-free, steel-free, and corrosion-resistant alternative for construction of new infrastructure. In this study, twenty-seven φ101.6 × 304.8 mm²FRP/ECCs are prepared. The composite columns are divided into three equal groups. Each group is prepared using concrete with different 28-d compressive strength. The first group is prepared using 35 MPa concrete, the second group using 50 MPa concrete, and the third one using 80 MPa concrete. FRP tubes with 5-mm wall thickness are used, which are filament-wound E-glass fiber-reinforced vinyl ester tubes with fibers orientated at ±54° from the axial direction. Coaxial compression, four-point bending, and push-out tests are conducted. Strain gages are used to monitor the local strain distributions of the FRP tubes. It has been found that the structural behavior of FRP/ECCs depends on the concrete strength. The confinement efficiency and the interfacial bonding strength are low for very high strength concrete.

Keywords

FRP concrete column encasement confinement

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References

Fardis, M.N. and Khalili, H.H. (1981). Concrete Encased in Fiberglass-reinforced Plastic , ACI Journal, 78: 440-446 .

Fardis, M.N. and Khalili, H.H. (1982). FRP-encased Concrete as a Structural Material , Magazine of Concrete Research, 34: 191-202 .

Mirmiran, A. (1996). A New Concrete-filled Hollow FRP Composite Column , Composites Part B: Engineering, 27B: 263-268 .

Seible, F. , Priestley, M.J.N. , Hegemier, G.A. and Innamorato, D. (1997). Seismic Retrofit of RC Columns with Continuous Carbon Fiber Jacket , ASCE Journal of Composite for Construction, 1: 52-62 .

Mirmiran, A. and Shahawy, M. (1997). Behavior of Concrete Columns Confined by Fiber Composites , ASCE Journal of Structure Engineering, 123: 583-590 .

Mander, J.B. , Priestley, M.J.N. and Park, R. (1988). Theoretical Stress-Strain Model for Confined Concrete , ASCE Journal of Structural Engineering, 114: 1804 .

Fam, A.Z. and Rizkalla, S.H. (2001). Confinement Model for Axially Loaded Concrete Confined by FRP Tubes , ACI Structural Journal, 98: 451-461 .

Fam, A.Z. and Rizkalla, S.H. (2002). Flexural Behavior of Concrete-Filled Fiber-Reinforced Polymer Circular Tubes , ASCE Journal of Composites for Construction, 6: 123-132 .

Chaallal, O. and Shahawy, M. (2000). Performance of Fiber-reinforced Polymer-wrapped Reinforced Concrete Column Under Combined Axial-Flexural Loading , ACI Structural Journal, 97: 559-668 .

10.

Teng, J.G. , Chen, J.F. , Smith, S. and Lam, L. (2002). FRP Strengthened RC Structures, John Wiley &! Sons, Ltd., England .

11.

Fam, A.Z. Flisak, B. and Rizkalla, S. (2003). Experimental and Analytical Modeling of Concrete-filled Fiber-reinforced Polymer Tubes Subjected to Combined Bending and Axial Loads , ACI Structural Journal, 100: 499-509 .

12.

Mirmiran, A. , Shahawy, M. , El Khoury, C. and Naguib, W. (2000). Large Beam-column Tests on FRP-filled Composite Tubes , ACI Structural Journal, 97: 268-276 .

13.

Toutanji, H. and Saafi, M. (2001). Durability Studies on Concrete Columns Encased in PVC-FRP Composite Tubes , Composite Structures, 54: 27-35 .

14.

Teng, J.G. and Yao, J. (2000). Self-weight Buckling of FRP Tubes Filled with Wet Concrete , Thin-Walled Structures, 38: 337-353

15.

Yeh, Y.-K. , Mo, Y.L. and Yang, C.Y. (2002). Seismic Performance of Rectangular Hollow Bridge Columns , ASCE Journal of Structural Engineering, 128: 60-68 .

16.

Cheng, H.-L. , Sotelino, E.D. and Chen, W-F. (2002). Strength Estimation for FRP Wrapped Reinforced Concrete Columns , Steel and Composite Structures, 2: 1-20 .

17.

Li, G. , Kidane, S. , Pang, S.S. and Stubblefield, M.A. (2003). Investigation into FRP Repaired RC Columns , Composite Structures, 62: 83-89 .

18.

Gibson, R.F. (1994). Principles of Composite Materials Mechanics, McGraw-Hill, Inc., New York .

Experimental Study of FRP Tube-encased Concrete Columns

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