000013261 001__ 13261
000013261 005__ 20161114160333.0
000013261 04107 $$aeng
000013261 046__ $$k2009-06-22
000013261 100__ $$aDesprez, C.
000013261 24500 $$aRetrofitting reinforced concrete structures with frp: numerical simulations using multifiber beam elements.

000013261 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013261 260__ $$bNational Technical University of Athens, 2009
000013261 506__ $$arestricted
000013261 520__ $$2eng$$aIn structural engineering, seismic vulnerability reduction of existing structures is a crucial issue. External reinforcement by Polymer Reinforced Fibers (FRP) is an interesting tool in order to fulfill this aim. However, the use of FRP reinforcement as a retrofitting method is limited, one of the reasons being the lack of predicting numerical tools for cyclic loading. This paper presents a method to predict the behavior of beam-column structures considering the FRP reinforcement effect. It describes the construction of a 1D concrete constitutive model suitable for monotonic and cycling loadings. The model is inspired on two well-known concrete models, the first one based on the damage mechanics theory (La Borderie concrete damage model), and the second one based on experimental studies (Eid & Paultre’s confined concrete model). Validation of the approach is done using experimental results on reinforced concrete beam and columns submitted to axial and flexural cyclic loading. The proposed method deals also with steel bar rupture considering low cycle fatigue effects. All the simulations are done using multifiber Timoshenko beam elements.

000013261 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013261 653__ $$aFRP; confined concrete; reinforced concrete; numerical modeling; multifiber beam. Abstract. In structural engineering, seismic vulnerability reduction of existing structures is a crucial issue. External reinforcement by Polymer Reinforced Fibers (FRP) is an interesting tool in order to fulfill this aim. However, the use of FRP reinforcement as a retrofitting method is limited, one of the reasons being the lack of predicting numerical tools for cyclic loading. This paper presents a method to predict the behavior of beam-column structures considering the FRP reinforcement effect. It describes the construction of a 1D concrete constitutive model suitable for monotonic and cycling loadings. The model is inspired on two well-known concrete models, the first one based on the damage mechanics theory (La Borderie concrete damage model), and the second one based on experimental studies (Eid & Paultre’s confined concrete model). Validation of the approach is done using experimental results on reinforced concrete beam and columns submitted to axial and flexural cyclic loading. The proposed method deals also with steel bar rupture considering low cycle fatigue effects. All the simulations are done using multifiber Timoshenko beam elements.

000013261 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013261 720__ $$aDesprez, C.$$iMazars, J.$$iKotronis, P.$$iPaultre, P.$$iRoy, N.$$iTrudeau M., B.
000013261 8560_ $$ffischerc@itam.cas.cz
000013261 8564_ $$s2550058$$uhttps://invenio.itam.cas.cz/record/13261/files/CD389.pdf$$yOriginal version of the author's contribution as presented on CD, section: Cyclic statics and dynamics of reinforced concrete structures (MS).
000013261 962__ $$r13074
000013261 980__ $$aPAPER