An Experimental Study on Shear Strengthening of RC Lightweight Deep Beams Using CFRP
- سال انتشار: 1393
- محل انتشار: Journal of Rehabilitation in Civil Engineering، دوره: 2، شماره: 2
- کد COI اختصاصی: JR_CIVLJ-2-2_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 107
نویسندگان
PhD Student, College of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
PhD candidate, College of Civil Engineering, Babol Noshirvani University of Technology, Babol
Assistant Professor, College of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
Professor, Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science & Technology, Tehran, Iran
Assistant Professor, College of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
چکیده
. This paper presents the results of an experimental investigation on shear strength enhancement of reinforced concrete deep beams externally reinforced with fiber reinforced polymer (FRP) composites. A total of six deep beam specimens of two different classes, as-built (unstrengthened) and retrofitted were tested in the experimental evaluation program. Two composite systems namely carbon/epoxy laminates and carbon/epoxy sheets were used for retrofit evaluation. A comparative study of the experimental results with published analytical models, including the ACI ۴۴۰ model, was also conducted in order to evaluate the different analytical models and identify the influencing factors on the shear behavior of FRP strengthened reinforced concrete deep beams. Experimental results indicated that the composite systems provided substantial increase in ultimate strength of strengthened beams as compared to the as-built beam specimen. The strength gain caused by the CFRP sheets was in the range of ۳۰–۵۸% Analytical Comparison indicated that the shear span-to-depth ratio (a/d) is an important factor that actively controls the shear failure mode of beam and consequently influences on the shear strength enhancement.کلیدواژه ها
Lightweight concrete, deep beams, Shear enhancement, Analytical modeling, CFRP compositeاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.