Prediction of the IC debonding failure of FRP-strengthened RC beams based on the cohesive zone model
Abstract Intermediate crack (IC) debonding failure is one of the common bending failure forms of fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams. In this paper, a new prediction model for IC debonding in FRP-strengthened RC beams is proposed based on fracture mechanics and cohesive zone model (CZM), which takes into account the coupling effect of many parameters and has the advantages of high precision and simple expression. The nonlinear behavior of FRP-strengthened RC beams and the influence of flexural cracks are reasonably considered in this model, whereas all existing analytical models based on the CZM neglect this effects. To verify the accuracy of this model, we established a database containing 248 test data from the existing literature. By comparing the differences between the predicted and experimental results, we analyzed the causes of the error and established a semiempirical model. To test the reliability of the model, it is evaluated using the database constructed in this paper together with four representative strength models. The results show that the semiempirical model has a high accuracy.
Main Authors: | Zhang,Jingchun, Guo,Rong, Li,Shengyue, Zhao,Shaowei |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Associação Brasileira de Ciências Mecânicas
2020
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252020000600509 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Assessment of plate-end debonding design provisions for RC beams strengthened with FRP
by: Al-Saawani,Mohammed A., et al.
Published: (2020) -
Simulating Intermediate Crack Debonding on RC Beams Strengthened with Hybrid Methods
by: Shukri,Ahmad Azim, et al.
Published: (2018) -
Size effect on the methodology with cylinder specimens for FRP-to-concrete debonding analysis
by: Borges,Luana Ferreira, et al.
Published: (2021) -
Finite element simulation of RC beams under flexure strengthened with different layouts of externally bonded fiber reinforced polymer (FRP) sheets
by: Umair-Saleem,Muhammad, et al.
Published: (2018) -
RC T beams strengthened to shear with carbon fiber composites
by: Spagnolo JR,L. A., et al.
Published: (2013)