دراسة عملية لسلوك الخرسانة المسلحة بالالياف الزجاجية تحت تاثير الاحمال التزايدية والاحمال التكرارية

Abstract

This research includes test results on standard concrete cylinders (150x300) mm, containing different percentages of glass fiber (0,1.1,1.64,2.2) %, each point represent average of three specimen under two types of loading, monotonic and repeated loads, the load was applied by six cycles with rate of loading (0.3) N/mm2/Sec to study the behavior of this kind of concrete under these types of loading.The results showed that the behavior of concrete improved due to the addition of glass fiber and this improvement increased with increasing the percentage of the fiber added.From the results note that the stresses carried by the concrete increased by (5.4, 9, & 16.3)% also the strain increased by (1.3, 14.3, & 24.67)% for fiber percentages (1000, 1500, & 2000) gm/m3 for monotonic loading, and stress increased by (4.5, 7.2, &9) and strain increasing by (5, 12.5, & 27.5) for the same percentages under repeated loads.Compressive strength, Dissipeated energy, and modulus of elasticity also increased with increasing fiber percentages.