ANALYSIS OF CONCRETE FLEXURAL MEMBERS REINFORCED WITH FIBRE POLYMER
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Abstract
Analytical model is used in this paper to predict the load carrying capacity of structural concrete members under flexural and normal force which can be concentric or eccentric. The analysis is based on requirement of equilibrium and compatibility of strain in concrete and steel or FRP. The adopted model is based on the real stress strain diagrams for materials. In accordance with this model, the member cross section is covered by a mesh with the smallest cells. After that, stress or strain is determined in each cell and the integral is substituted by the process of summation to define the elements of stiffness matrix. The force vectors equations have nonlinear behaviour. However, in this model, these nonlinear equations are changed to linear equations using the iteration methods with fixity of secant modulus of elasticity in each iteration cycle. In this paper. FORTRAN computer program language is used to compute the force and strains vectors. The comparison between the analytical resaks obtained from the used model and experimental data for other researchers is performed. The analytical model is giving a reasonable agreement between the theoretical and experimental results.
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Goto, Y.; Wang. Q.; and Obata, M.; 1998, FEM Analysis for Hysteretic Behaviour of Thin-Walled Columns, Journal of Structural Engineering, Vol.124, No. 11. pp. 1290-1301.
Dolan, C.W.; Rizkalla, S.; and Nanni, A.; 1999, Fibre-Reinforced-Polymer Reinforcement for Reinforced Concrete Structure, SP-188, American Concrete Institute, Farmington Hills, MI, pp.1182.
Dolan, C.; and Burke, C.R., 2001, Flexural Design of Prestressed Concrete Beams Using FRP Tendons, PCI Journal, Vol. 46, No.2, pp. 76-87.
Korpenko, N.I.; Mukhamediev, T.A.; and Petrov, A.N., 1986, The Initial and Transformed Stress-Strain Diagrams of Steel and Concrete, Special Publication, Stress-Strain Condition for Reinforced Concrete Construction, Reinforced Concrete Research Centre, Moscow,pp.7-25
Leax. T.R., Dowling, N.E., Brose, W.R.; and Peck, M.G., 1985. Methodology for Correlating Fatigue Data Obtained under Different Test Conditions, Journal for Testing and Evaluation, JTEVA, Vol.13. No.6, pp.393-404.
Nguyen, D.M., Chan, T.K., and Cheong, H.K: 2001. Brittle Failure and Bonded Development Length of CFRP-Concrete Beams, Journal of Composite for Construction, Vol.5, No.1, pp.12-17.
Nilson, A.11., Slate, F.O., and Martinez, S., 1986, Mechanical Properties of High-Strength Light Weight Concrete, ACI Journal Proceeding, Vol. 81, No.4, pp.606-613
Oukaili, N.K.; 1998, Moment Capacity and Strength of Reinforced Concrete Members Using Stress-Strain Diagrams of Concrete and Steel, Journal King Saud Univ., V.10, No.2, pp.23-44 (in Arabic).
Oukaili, N.K.; 1999, Model for Predicting the Cracking Moment in Structural Concrete Members, Al-Yarmok Searches (Sciences Series of Essential and Engineering), V.8, No.2, pp.9-39 (in Arabic).
Oukaili, N.K., and Akasha, A.M.: 2002, General Program to Study the Behaviour of Concrete Structural under Static Loads, First Civil Engineering Conference, Sebha University (Sebha, Liyba), pp.1-19, (in Arabic).
Pešić, N.; and Pilakoutas, K.; 2005, Flexural analysis and design of reinforced concrete beams with externally bonded FRP reinforcement, Materials and Structures, Vol.38, pp.183-192.
Smith, G.M.; and Young, L.E; 1956, Ultimate Flexural Analysis Based on Stress-Strain Curves of Cylinders, ACI Journal. Proceedings, V.53. No.6, pp.597-609.
Tasnımı, A.A.: 2004, Mathematical Model for Complete Stress-Strain Curve Prediction of Normal, Light-Weight and High-Strength Concretes. Magazine of Concrete Research, Vol.56, No. 1. February, pp.23-34.
Wang, P.T.; Shah, S.P.; and Naaman, A.E.; 1978, Stress-Strain Curve for Normal and Light Weight Concrete in Compression, ACI Journal Proceeding, Vol.75. No.11, pp.603- 611
Zou, P., Shang. S.; Peng. H.; and Wang, H.; 2005, Avoiding De-bonding in FRP Strengthened Reinforced Concrete Beams Using Prestressing Techniques, Proceeding of The International Symposium on Bond Behaviour of FRP in Structure (BBFS) Chen and Teng (eds).