Dapped-End Strengthening of Full-Scale Prestressed Double Tee Beams with FRP Composites
Abstract
The unusual shape of the dapped-end beam develops a severe stress concentration at the re-entrant comer. If suitable reinforcement is not provided close to the re-entrant comer, the diagonal tension crack may grow rapidly and failure may occur with little or no warning. This paper reports the testing of three full-scale prestressed concrete (PC) double tee beams (five tests) in shear at the re-entrant comer. One dapped-end of each beam was reinforced with internal steel reinforcement as a bench mark and the other was strengthened with externally bonded carbon fiber reinforced polymer (CFRP) laminates. of the two CFRP strengthened dapped-ends one used one-ply externally bonded CFRP reinforcement and the other two-ply externally bonded CFRP reinforcement with a U-anchor. the tests revealed that the reinforcement arrangements have significant influence on the member response. for one of the CFRP cases, the application of the anchor was such that failure by fiber rupture rather than peeling was achieved. Results from design computations were confirmed.
Recommended Citation
P. C. Huang and A. Nanni, "Dapped-End Strengthening of Full-Scale Prestressed Double Tee Beams with FRP Composites," Advances in Structural Engineering, vol. 9, no. 2, pp. 293 - 308, SAGE Publications, Apr 2006.
The definitive version is available at https://doi.org/10.1260/136943306776987010
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Anchorage; Dapped-end; Design; Fiber reinforced polymers; Prestressed concrete; Shear; Strengthening; Testing
International Standard Serial Number (ISSN)
1369-4332; 1369-4332
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 SAGE Publications, All rights reserved.
Publication Date
01 Apr 2006
