Experimental Investigation of Low Velocity Impact Behaviour of RC Two Way Slab Strengthening with CFRP Strips
Tolga Yılmaz1, Nevzat Kıraç2, Özgür Anil3, Ceyda Sezer4
1Ph. D. Student, Res. Assist. of Osmangazi University, Department of Civil Eng.
Osmangazi University, Engineering Faculty, Civil Eng. Dept., Eskişehir, Turkey.
tyilmaz@ogu.edu.tr
2Ph. D., Prof. Dr.of Osmangazi University, Department of Civil Eng.
Osmangazi University, Engineering Faculty, Civil Eng. Dept., Eskişehir, Turkey.
kiracn@ogu.edu.tr
3 Ph. D., Prof. Dr.of Gazi University, Department of Civil Eng.
Gazi University, Engineering Faculty, Civil Eng. Dept., Ankara, Turkey.
oanil@gazi.edu.tr
4Ms. c. Student, Ms. c. Student of Osmangazi University, Department of Civil Eng.
Osmangazi University, Engineering Faculty, Civil Eng. Dept., Eskişehir, Turkey.
sezer.ceyda@hotmail.com
Abstract. There are a considerably number of studies focused on behavior of reinforced concrete (RC) slabs under static and dynamics loadings in the literature. However, investigations related to RC slabs and Carbon Fibre Reinforced Polymer (CFRP) strengthened RC slabs subjected to impact load are still relatively rare. Consequently, an experimental study was performed in order to determine impact behavior of two way simply supported RC slabs strengthened with CFRP strips. The arrangement of CFRP strips were varied in experimental study. The impact load was applied to slabs using moveable drop-weight test machine which are capable of dropping hammer of 250 kg from 2.5 m designed by the authors. A total of five RC slabs that were 1000x1000x80 mm dimensions were manufactured. RC slabs were strengthened using CFRP with width of 50 mm as orthogonally and diagonally in both one and two directions. One of the specimens was un-strengthened and manufactured as reference specimens. The time-history of the impact force, the accelerations of two points, the center displacement of slabs and the strains of four points on CFRP strips were measured. The crack patterns of slabs are also observed. In the light of experimental results, the effects of applied strengthening method on low velocity impact behavior of RC slabs were determined and interpreted.
Keywords: Low velocity impact, RC two way slab, Strengthening, CFRP.
