Structural Behaviour of FRP-Reinforced Tubular T-Joint Subjected to Combined In-Plane Bending and Axial Load

In this study, 90 finite-element models are used to explore the behaviour of fibre-reinforced polymer (FRP) reinforced joints under combined in-plane bending (IPB) and axial load (AX). The effects of joint geometry, FRP layer count, and AX levels of the chord or brace are considered. Three typical f...

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Bibliographic Details
Published in:Buildings (Basel) 2024-02, Vol.14 (2), p.412
Main Authors: Deng, Peng, Chen, Yunkai, Zhu, Zhongyi, Liu, Yan, Zhao, Shiqi, Guo, Jian
Format: Article
Language:English
Subjects:
Axial loads
Bending
Boundary conditions
circular hollow section
Ductility
Failure modes
Fiber reinforced plastics
Fiber reinforced polymers
finite element analysis
Finite element method
FRP strengthening
Geometry
in-plane bending
Investigations
Joint geometry
Load
Mathematical models
Polymers
Simulation
Stress concentration
Stress distribution
Structural behavior
Tee joints
tubular T-joints
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Summary:In this study, 90 finite-element models are used to explore the behaviour of fibre-reinforced polymer (FRP) reinforced joints under combined in-plane bending (IPB) and axial load (AX). The effects of joint geometry, FRP layer count, and AX levels of the chord or brace are considered. Three typical failure modes are observed: chord plastic failure, brace plastic failure, and brace buckling failure. Increasing the number of FRP layers can ensure that failure is chord-related failure in a ductility manner rather than the unexpectedly brace-related brittle failure. Depending on the stress distribution of fibres, FRP reinforcement can restrict the deformation of joints subjected to complex loading patterns. Moreover, added FRP layers efficiently reduce the effect of brace AX on the IPB resistance. Finally, a modified strength equation is established, including the influence of FRP reinforcement, chord AX, and brace AX.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14020412