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Experimental Investigation Of Layered Reinforced Concrete Beams

مؤلف البحث
Yehia A. Hassanean
Hany Madkour
Mohamed A. Saif
المشارك في البحث
سنة البحث
2016
مجلة البحث
2nd International conference on mechanics of composites, 11-14 June, 2016, Porto, Portugal.
الناشر
2nd International conference on mechanics of composites, 11-14 June, 2016, Porto, Portugal.
عدد البحث
NULL
تصنيف البحث
3
صفحات البحث
NULL
موقع البحث
http://aicsge9.alexu.edu.eg/
ملخص البحث

Concrete reinforced with short steel fibers is associated with its significant ability to control cracking and enhances its ductility and tensile properties. For this reason, steel fiber reinforced concrete (SFRC) has been widely used in RC structures, where tensile cracks very often occur. In the current work, an experimental program was developed to experience the flexural behavior of the two-layered concrete beams. The tensile zone of the investigated RC beams is made of steel fiber reinforced concrete (SFRC), while the compression zone was developed from normal strength concrete (NSC). Eight RC beams specimens of size 120*300*2300 mm were tested under one-point static loading to study the influence of different fiber ratios and the height of SFRC layer on flexural behavior of concrete. Crack width, crack propagation, deflection, steel strain, and concrete strain were measured and presented in this investigation. The test results indicated that, intensive improvement on overall flexural performance with respect to the corresponding non-layered control beams. Adding of steel fibers in the lower layer of concrete beams (tensile zone) increases the first cracking and ultimate loads, stiffness and ductility of the concrete beams.