Retrofit of RC Frames Using FRP Jacketing or Steel Bracing
Publish Year: 1384
نوع سند: مقاله ژورنالی
زبان: Persian
View: 139
This Paper With 12 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JSEE-7-2_004
تاریخ نمایه سازی: 14 آبان 1400
Abstract:
During recent seismic events, non-ductile failure modes of many existing structures occurred. Retrofit of these structures before the earthquake provides a feasible cost-effective approach to reduce the hazard to occupants' safety and owners' investment. The response of two reinforced concrete frames was examined under seismic excitation. The ۹-storey and ۱۸-storey frames are part of the lateral load resisting system in two office buildings that were designed according to the ۱۹۶۰s code provisions. The frames were analyzed assuming flexible joint response by considering the joint shear deformation or assuming traditional rigid joints. Two rehabilitation techniques were proposed to improve the dynamic response of these frames. Fibre reinforced polymer (FRP) jackets were used as a local rehabilitation technique to enhance the joint shear strength and ductility. As another option, X-steel braces were installed in the middle bay of the frame along its height as an alternate lateral load resisting system. For each frame, failure sequence and interstorey drift were examined. It was found that FRP wrapping eliminated the brittle failure modes without significant change in the structural response. However, steel bracing significantly contributed to the structural stiffness and reduced the maximum interstorey drift of the frames.
Keywords:
Authors
T. El-Amoury
Department of Civil Engineering, McMaster University
A. Ghobarah
Department of Civil Engineering, McMaster University