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https://hdl.handle.net/10316/112377
Título: | Effect of Tendon-Related Variables on the Behavior of Externally CFRP Prestressed Concrete Beams | Autor: | Lou, Tiejiong Hu, Han Pang, Miao |
Palavras-chave: | external prestressing; CFRP tendon; flexural strength; tendon stress; numerical modeling; analytical model | Data: | 24-Jul-2023 | Editora: | MDPI | Projeto: | FCT 2022.04729.CEECIND UIDB/00285/2020 LA/P/0112/2020 |
Título da revista, periódico, livro ou evento: | Materials | Volume: | 16 | Número: | 14 | Resumo: | This work assesses the flexural performance of prestressed concrete beams with external carbon fiber-reinforced polymer (CFRP) tendons, focusing on tendon-related variables. A finite element analysis (FEA) method is verified. A numerical parametric analysis of prestressed concrete beams with external CFRP tendons is carried out. Four tendon-related variables are considered, namely, the area, initial prestress, depth and elastic modulus of tendons. The analysis shows that flexural ductility decreases as the tendon area, initial prestress or elastic modulus increases but is insensitive to the tendon depth. The ultimate tendon stress increment (Δσp) is influenced by all of the four variables investigated. JGJ 92-2016 (Chinese technical specification for concrete structures prestressed with unbonded tendons) significantly underestimates Δσp and, hence, is over-conservative for the strength design of these beams. An equation is proposed for calculating Δσp, taking into account all four variables investigated. An analytical model is then developed to estimate the flexural strength (Mu) of prestressed concrete beams with external CFRP tendons. The proposed analytical model shows good agreement with FEA, i.e., the mean discrepancy for Δσp is 0.9% with a standard deviation of 11.1%; and the mean discrepancy for Mu is -1.6% with a standard deviation of 2.1%. | URI: | https://hdl.handle.net/10316/112377 | ISSN: | 1996-1944 | DOI: | 10.3390/ma16145197 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Eng.Civil - Artigos em Revistas Internacionais I&D CEMMPRE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Effect-of-TendonRelated-Variables-on-the-Behavior-of-Externally-CFRP-Prestressed-Concrete-BeamsMaterials.pdf | 6.26 MB | Adobe PDF | Ver/Abrir |
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