000			02386aab a2200217 4500
008			240216b20232023|||br||| |||| 00| 0 eng d
022			_a0889-3241
100			_aZhenwen Xu _9881011
100			_aDongming Yan _9881012
245			_aAn Improved Prediction for Bond Strength of Deformed Bars in Concrete Externally Confined with Fiber- Reinforced Polymer
300			_a19-32 p.
520			_aExternal bonding with fiber-reinforced polymer (FRP) offers a potential solution to mitigate the detrimental effects caused by load impact and corrosion, which can weaken the bond strength of reinforced concrete structures. However, existing models need to be improved in addressing the FRP confinement mechanism and failure modes. As a solution, the proposed model employs stress intensity factor (SIF)-based criteria to determine the internal pressure exerted on the steel-concrete interface during various stages of comprehensive concrete cracking. Critical parameters are evaluated using weight function theory and a finite element model. A bond-slip model is introduced for the FRP-concrete interface and reasonable assumptions on failure plane characteristics. The internal pressure model employed demonstrates that FRP confinement has the ability to generate dual peaks in stress distribution and modify their magnitude as the confinement level increases. The proposed predictive model demonstrates superior performance in failure modes, test methods, and wrap methods for assessing bond strength with FRP confinement. The accuracy of this model is indicated by an integral absolute error (IAE) of 9.6% based on 125 experimental data, surpassing the performance of the other three existing models. Moreover, a new confinement parameter is introduced and validated, showing an upper bound of 0.44 for enhancing FRP bond strength. Additionally, a general expression validating the bond strength model with FRP confinement is established, allowing for the prediction of bond length.
650			_aAnalytical Model _9680895
650			_aBond Strength _9169292
650			_aFiber-Reinforced Polymer (FRP) Confinement _9881013
650			_aStress Intensity Factor (SIF) _9881014
650			_aWeight Function _9881015
773	0		_x0889325X _tACI Materials Journal _dDetroit, U.S.A : American Concrete Institute
856			_uDOI:10.14359/51739144
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c814997 _d814997