6677

6228

كارشناسي ارشد

سازه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1390

ده، 95ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

داود مستوفي نژاد

17/2/91

محمد شكرچي زاده، كياچهربهفرنيا

1396/10/06

كتابنامه

عمران

مهندسي عمران

ID6228

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

The Nonlinear Finite Element Analysis of FRP Strengthened RC Beams with Externally Bonded Reinforcement On Grooves EBROG Technique Houman Ebrahimpour Komleh h ebrahimpourkomleh@cv iut ac ir November 2 2011 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor Dr Davood Mostofinejad Prof Email address dmostofi@cc iut ac irAbstract Fiber Reinforced Polymer FRP composites are widely used for rehabilitation repair and strengthening ofreinforced concrete RC structures The main problem that has greatly affected the performance of flexuralstrengthening with Externally Bonded Reinforcement EBR methods is the premature debonding of FRPlaminates from the beam substrate Recently special treatments on concrete surface prior to using FRP sheets inthe EBR technique named as Externally Bonded Reinforcement On Grooves EBROG has been introduced inIsfahan University of Technology IUT Iran According to this method longitudinal grooves were first cavedon the tension face of the reinforced concrete beam then the grooves were cleaned with compressed air andfilled with appropriate epoxy resin Finally carbon fiber sheets were adhered to the surface It is showed that bychoosing specified width and height for grooves this method can considerably postpone the debonding and insome cases may completely eliminate it Numerical methods such as Finite Element Method FEM are strong ways for prediction and modeling ofdebonding in FRP strengthened RC beams In this study a novel technique based on non linear finite elementanalysis is presented which considers behavior of the interface layer by using suitable Mixed Mode BondStress Slip models The analyses results show good agreement with the experimental data regarding load displacement response crack pattern and failure mode Also the effects of number width and height of the grooves Initial flexural reinforcement ratio and number ofFRP layers on the behavior of the EBROG method are investigated The results indicated that by choosingappropriate number and dimensions for grooves depending on internal and external reinforcement ratio thismethod can control the premature debonding of FRP laminates Finally based on these parametric studies sometechnical suggestions and design diagrams are presented Key WordsFRP Materials Debonding EBROG Method FE Method Interface Layer

داود مستوفي نژاد

محمد شكرچي زاده، كياچهربهفرنيا