2013

Betonların Güçlendirilmesinde FRP Kompozitlerin Hibrit Olarak Kullanımının etkisi

Bu çalışmada, standart silindir boyutlarda üretilen betonların Elyaf Takviyeli Polimer (FRP) kompozitler ile güçlendirilmesinde elyaf türü, sargı katman sayısı ve faklı tür elyafın hibrit olarak kullanımının etkileri araştırılmıştır. Aynı şartlar altında üretilmiş, ortalama 30,25 MPa basınç dayanımına sahip betonlar tek doğrultulu cam ve karbon elyaf kumaşlarla enine bir, iki, üçer kat sarılarak ve ayrıca cam ve karbon kumaş hibrit olarak sarılarak güçlendirilmiştir. Beton numuneler eksenel basınç testi altında sabit hızlı yükleme ile test edilmiştir. Elyaf türünün, sargı katmanı sayısının ve hibrit kullanımının beton davranışına etkileri karşılaştırmalı olarak incelenmiştir. Test sonuçları incelendiğinde, sargı katmanı sayısı arttığında betonun basınç dayanımı ve deformasyon kabiliyetinin arttığı tespit edilmiştir. Ayrıca hibrit güçlendirmenin tekil güçlendirmeye göre daha etkili olduğu ortaya konulmuştur.

Effect of Using FRP Composites as Hybrid in the Strengthening of Concretes

In this study, the effect of fiber type, number of layers and hybrid use of different type fibers on concrete behavior was investigated in standard cylinder concretes strengthened by Fiber Reinforced Polymer (FRP) composites. Specimens were produced in average of 30.25 MPa compressive strength with standard cylinder sizes and were strengthened with unidirectional glass fiber fabric, unidirectional carbon fiber fabric and hybrid use of glass and carbon fiber fabrics. Concrete members were tested under axial compressive loads. The effect of fiber type, number of layers and hybrid use of different type fibers on concrete behavior was evaluated comparatively. The test results have indicated that concrete compressive strength and deformation capacities increase when the number of wrap layers increase. It is also shown that hybrid strengthening is more effective than individual strengthening.

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