Near free-edge stresses in FRP-to-concrete bonded joint due to mechanical and thermal loads

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Samadvand h.; DEHESTANI M.

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Journal Paper

Paper Information

Journal: SCIENTIA IRANICA Year:2020 | Volume:27 | Issue:6 (Transactions A: Civil Engineering) Page(s): 2727-2739

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Information Journal Paper

Title

Near free-edge stresses in FRP-to-concrete bonded joint due to mechanical and thermal loads

Author(s)

Samadvand h. | DEHESTANI M. | Issue Writer Certificate

Keywords

FRP-to-concrete bonded joint

Thermomechanical load

Free-edge interfacial stress

Boundary layer

Debonding failure

Finite element method

Abstract

Over the last few decades, a considerable number of theoretical and experimental investigations have been conducted on the mechanical strength of composite bonded joints. Nevertheless, many issues regarding the debonding behavior of such joints still remain uncertain. The high near free-edge stress fields in most of these joints are the cause of their Debonding failure. In this study, the performance of an externally bonded Fiber-Reinforced Polymer (FRP) composite to a concrete substrate prism joint subjected to mechanical and Thermomechanical loadings was evaluated using the principles of lamination theory. An inclusive Matlab code was generated to perform computations. The bond strength was estimated to take place in a region-also termed as the Boundary layer-where the peak interfacial shearing and transverse peeling stresses occurred, whereas the preceding stress field was observed to be the main failure mode of the joint. The proposed features were validated by using the existing experimental data points as well as the commercial Finite Element (FE) modeling software, Abaqus. A comparison between the calculated and experimental results demonstrated favorable accord, producing quite a high average ratio. The current approach facilitates failure modeling analysis, optimal design of bonded joints, and scaling analysis among others.

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APA: Copy

Samadvand, h., & DEHESTANI, M.. (2020). Near free-edge stresses in FRP-to-concrete bonded joint due to mechanical and thermal loads. SCIENTIA IRANICA, 27(6 (Transactions A: Civil Engineering)), 2727-2739. SID. https://sid.ir/paper/979382/en

Vancouver: Copy

Samadvand h., DEHESTANI M.. Near free-edge stresses in FRP-to-concrete bonded joint due to mechanical and thermal loads. SCIENTIA IRANICA[Internet]. 2020;27(6 (Transactions A: Civil Engineering)):2727-2739. Available from: https://sid.ir/paper/979382/en

IEEE: Copy

h. Samadvand, and M. DEHESTANI, “Near free-edge stresses in FRP-to-concrete bonded joint due to mechanical and thermal loads,” SCIENTIA IRANICA, vol. 27, no. 6 (Transactions A: Civil Engineering), pp. 2727–2739, 2020, [Online]. Available: https://sid.ir/paper/979382/en

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