Closed form equations for FRP flexural strengthening design of RC beams

✍ Scribed by Hayder A. Rasheed; Shariq Pervaiz

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 316 KB
• Volume: 34
• Category: Article
• ISSN: 1359-8368
• DOI: 10.1016/s1359-8368(03)00047-7

✦ Synopsis

FRP external strengthening has proven its success in structural rehabilitation and upgrade. Researchers and practicing engineers are working towards introducing its design procedures to standard codes of practice. The current state of the art flexural design process suggests an iterative approach, which may lead to tedious calculations. This paper provides a direct approach furnishing calculation simplicity and design efficiency. It also proposes equations to design doubly strengthened sections for the first time. The expressions derived for doubly reinforced rectangular and Tee sections are written in a compact form based on those formulated for singly reinforced rectangular sections. Verifications against experimental results are performed. The solution, using the closed form equations, is compared to that of other procedures available in the literature through design examples. Tee section design is also presented and illustrated through a comparison with an analysis example. A doubly strengthened beam design example is also solved. The prevention of premature FRP plate separation using Uwraps to develop the full flexural capacity is also discussed.