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۱PERFORMANCE INVESTIGATION OF RC SHORT COLUMNS RETROFITTED WITH FRP COMPOSITES IN PASSIVE & ACTIVE STATES
نویسنده(ها): ، ، ،
اطلاعات انتشار: سومین کنفرانس بین المللی بتن و توسعه، سال
تعداد صفحات: ۸
Short columns and columns having weakness in transverse reinforcement have shown inappropriate behaviour in confronting with shear forces during different earthquakes and the shear failure mode of these columns is the main failure mode. One of the most conventional methods for improving the behaviour of these columns is the application of wrapped FRP jacket. These FRP jackets are lightweight, high strength and have a convenient installation process. These jackets can be utilized both in active and passive states. In this study, weak and retrofitted columns have been modelled using “Seismostruct” software and have been compared with experimental conclusions as well. In passive retrofitted specimens, the improvement in value of energy dissipation observed was about 1.7 to 4 times greater than control specimens. Furthermore, drift angle was increased about 1.4 to 2.5 times greater. Moreover, active retrofitted specimens have emonstrated a better behaviour than passive ones. In most of the specimens the growth was about 20% and 30 to 40 percent in shear strength and quantity of energy dissipation, respectively. Finally, AFRP composites have demonstrated higher ductility than CFRP composites, despite the fact that the shear strength of CFRP was higher than AFRP type.<\div>

۲PERFORMANCE INVESTIGATION OF RC SHORT COLUMNS RETROFITTED WITH FRP COMPOSITES IN PASSIVE & ACTIVE STATES
نویسنده(ها): ، ، ،
اطلاعات انتشار: سومین کنفرانس بین المللی بتن و توسعه، سال
تعداد صفحات: ۸
Short columns and columns having weakness in transverse reinforcement have shown inappropriate behaviour in confronting with shear forces during different earthquakes and the shear failure mode of these columns is the main failure mode. One of the most conventional methods for improving the behaviour of these columns is the application of wrapped FRP jacket. These FRP jackets are lightweight, high strength and have a convenient installation process. These jackets can be utilized both in active and passive states. In this study, weak and retrofitted columns have been modelled using “Seismostruct” software and have been compared with experimental conclusions as well. In passive retrofitted specimens, the improvement in value of energy dissipation observed was about 1.7 to 4 times greater than control specimens. Furthermore, drift angle was increased about 1.4 to 2.5 times greater. Moreover, active retrofitted specimens have emonstrated a better behaviour than passive ones. In most of the specimens the growth was about 20% and 30 to 40 percent in shear strength and quantity of energy dissipation, respectively. Finally, AFRP composites have demonstrated higher ductility than CFRP composites, despite the fact that the shear strength of CFRP was higher than AFRP type.<\div>
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