Akademik Veri Yönetim Sistemi
16th European Conference of Fracture, Alexandroupoli, Yunanistan, 3 - 07 Temmuz 2006, ss.625-626
Many existing reinforced concrete structures, built before recent seismic design codes, can not exhibit a ductile behavior during earthquakes, and may experience severe structural damage. The main reason of nonductile behavior is insufficient and inadequately detailed transverse reinforcement. In developing countries, concrete quality of structural members is not sufficient as well. External confinement of structural members can overcome this deficiency. In this study, a retrofit technique in terms of external confinement of concrete members by using prefabricated panels of steel fiber reinforced cementitious composites (SFRCC) is investigated. For this purpose, concrete members with rectangular cross-section were externally confined by using prefabricated SFRCC panels and tested under axial loads. The concrete compressive strength of original specimens was around 10 MPa, while the compressive and tensile strengths of the prefabricated SFRCC panels were around 100 and 14 MPa, respectively. Test results showed that external confinement with prefabricated panels provided significant enhancement in ductility, as well as compressive strength enhancement. The investigated technique seems to be a promising method due to ease in application, relatively less hindrance to the building, high efficiency in the case of non-circular members, better quality control due to prefabrication and relatively less cost with respect to its alternatives.