کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
258785 503622 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture behavior of concrete beams reinforced with mixed long/short steel fibers
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Fracture behavior of concrete beams reinforced with mixed long/short steel fibers
چکیده انگلیسی

This work presents the results of an experimental activity carried out on Fiber-Reinforced Concrete (FRC) obtained by mixing short and long hooked-end steel fibers. Eleven mixtures were considered including plain concrete as a reference and steel-FRC with 0.5% and 1.0% of fiber volume fractions. The experimental campaign was aimed at observing the key aspects of the mechanical behavior of FRC in bending. Particularly, the study was focused on examining the results of four-point bending (4 PB) tests performed on notched prisms. The structural behavior was evaluated in terms of traction–separation law of FRC and the possible influence of both amount and type of fibers was investigated. Finally, a non-linear cracked hinge model was presented through an appropriate meso-mechanical approach aimed at simulating two key crack-bridging mechanisms of fibers. Comparisons between experimental data and numerical predictions were discussed.


► This paper presents the results of an experimental activity on FRC specimens.
► Specimens were made by mixing long and short steel fibers.
► A non-linear cracked model was developed based on the explicit meso-mechanical fiber modeling.
► The constitutive law was based on the flow theory of plasticity combined with fracture mechanics.
► The predictive capabilities of the formulation were compared with the presented experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 37, December 2012, Pages 832–840
نویسندگان
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