کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
308899 513571 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanically-fastened hybrid composites for flexural strengthening of steel beams
ترجمه فارسی عنوان
کامپوزیت هیبرید مکانیکی برای تقویت خمشی از پرتوهای فولادی
کلمات کلیدی
پرتو فولادی کامپوزیت فیبر تقویت پلیمر، تجربی، عددی روش عنصر محدود رفتار انعطاف پذیر
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Full-scale steel beams with mechanically fastened FRP laminates are tested.
• The Finite Element Method is used to simulate the behavior of the tested beams.
• The FE model is validated by comparing the FE predictions with the experimental results.
• The FE analyses shed more light on the test results of the tested.
• It is concluded that the FRP contributes significantly in carrying mid-span loads after yielding.

Recent experimental studies by Sweedan et al. [17] and Alhadid et al. [2] on the behavior of mechanically fastened (MF) steel-FRP lap connections and steel beams strengthened with MF-FRP, respectively, revealed a promising efficiency of the fastening system in retrofitting deteriorated steel beams. The study demonstrated that the dominant failure mode, in the tested connections and beams, was due to excessive bearing in the FRP laminate at the locations of the fasteners as long as sufficient number of fasteners is used. The current study describes a three-dimensional nonlinear finite element (FE) model that accounts for the interfacial slip between the FRP laminates and the steel beam. The FE model is validated against the experimental results reported by Alhadid et al. [2], and excellent agreement is found. The FE model is then used to shed more light on the mechanical behavior of the tested composite steel-FRP beams including force distribution in steel fasteners especially during spread of yielding in the steel section, and the stress distribution in the FRP laminates. The study concludes that as the length of the FRP increases, the degree of composite action in the elastic range increases indicating higher efficiency of the FRP laminate. The FRP laminate contributes significantly in carrying the mid-span loads after yielding of the steel section.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin-Walled Structures - Volume 85, December 2014, Pages 250–261
نویسندگان
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