Fea of cfst beam partially wrapped by cfrp sheet persentation
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Transcript of Fea of cfst beam partially wrapped by cfrp sheet persentation
Finite Element Analysis of Concrete-Filled Steel Tube
Beams Partially Wrapped with CFRP sheet
Finite Element Analysis of Concrete-Filled Steel Tube
Beams Partially Wrapped with CFRP sheet
Ahmed W. Al-Zand , Wan Hamidon Wan Badaruzzaman, Azrul A. Mutalib and Salam J. Hilo
Department of Civil and Structural Engineering Faculty of Civil Engineering and Built EnvironmentNational University of Malaysia (UKM)
INTRODUCTION
Application of concrete-filled steel tube beams
Nakamura et al. 2002Bridge of Shinkansen - Japan
OBJECTIVES
• Study the potential use of CFRP sheets for strengthening the square and circular CFST flexural members
• Investigate the behavior of CFST beams which are wrapped partially by CFRP sheets
• Establish the optimum CFRP wrapping length and no. of layers could be used for strengthening action
FINITE ELEMENT ANALYSIS
A. Modelling of the CFST beams
Square Tube (91.5 x 91.5 x 3.6mm)
Circular Tube (107.4x 3.5mm)
CONCLUSION
•The proposed FE modelling is sufficient to implement the behaviours of the CFST beams partially wrapped with CFRP sheet.
•Beams wrapped along 50% of its length showed decreasing of their ultimate moment capacities with increasing layers of CFRP patch because of the delamination failures was occurred.
•Beams wrapped along 75 & 100% of its length showed increasing of their ultimate moment capacities with increasing layers of CFRP patch, where they reached their ultimate strength.
CONCLUSION
•No significant improvement was observed in the ultimate moment capacity for square and circular CFST beams when the CFRP wrapping length increased from 75 to 100%.
•The capacity of circular CFST beam showed better improvement than the square beam when strengthened by 1 & 3 CFRP layers, where it’s increased around 65 & 100% for circular beams compared to only 19 & 64% for square beams, respectively.