Secondary Reinforcement for FRP Reinforced Concrete
Secondary Reinforcement for FRP Reinforced Concrete
Secondary Reinforcement for FRP Reinforced Concrete
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Appropriate Environmental Reduction Factors <strong>for</strong> <strong>FRP</strong>Investigators:Mahmut Ekenel (Post Doctoral Researcher)Dr. John J. Myers (Faculty Advisor)Sponsored by:NSF Industry/University Cooperative Research CenterJanuary 7 th -8 th , 2005Objectives:To investigate andSample Durability Testing:develop appropriateenvironmentalreduction factors <strong>for</strong><strong>FRP</strong> based onexperimental andavailable literature.Fatigue EvaluationThe study will includeavailable test dataExternal Conditioned& Sustained Loadingincluding combinedeffects such assustained loading, hightemperature, lowtemperature, highEnvir. ChamberEnvir. Conditioned &humidity, fatigue, etc.NSMR Envir. ExposureConditionedSustained LoadingSample Reported UMR Test Results:Stiffness (kN/mm)222018161412108C<strong>FRP</strong>-ControlC<strong>FRP</strong>-AnchorC<strong>FRP</strong>-Env.(4)C<strong>FRP</strong>-Env.(4)-Del.C<strong>FRP</strong>-Env.(8)C<strong>FRP</strong>-Env.(8)-Del.C<strong>FRP</strong>-Ext.C<strong>FRP</strong>-Ext.-Del.Un-strengthenedFailure Load (kN)8070605040302010Com pressive Stress (M Pa)5045403530252015105Unconfined <strong>Concrete</strong>G<strong>FRP</strong> NaCl ExposureG<strong>FRP</strong> ControlG<strong>FRP</strong> EnvironmentalBond Retension Factor*1009080706050403020Load = 4000 lbs* ratio of load to strain60 500 1000 1500 2000 2500Number of Cycles (Thousands)0LaboratoryConditionedEnvironmentalChamber Conditioned00 0.2 0.4 0.6 0.8 1 1.2 1.4Axial Strain %1000-C-C 25-C-3 40-C-3 0-C-5 25-C-5 40-C-5ID x-x-x = sustained load % of ultimate; laminate type; # of envir.
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