PSI - Issue 6

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Vimal Kumar et al. / Procedia Structural Integrity 6 (2017) 95–100 Author name / Structural Integrity Procedia 00 (2017) 000 – 000

1200

Center Quarter

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-400

Acceleration (g)

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-1200

0 3 6 9 12 15

Time (ms) (a) Slab RC1

Time (ms)

(b) Slab RC2

Fig. 4. Acceleration-time history for prestressed and reinforced concrete slabs

5. Conclusions Drop weight impact experiments were carried out to investigate the impact resistance behavior of prestressed concrete. The impact-force, reaction, displacement and acceleration response have been measured with the help of data logger. The influence of induced stress on the response of PC slab has been studied by directly comparing the results with that of the reinforced concrete slab and the following outcomes were obtained.  Prestressing of the slab has increased the impact resistance and load carrying capacity of the slab therefore prestressed concrete slab has reported relatively higher impact force.  The stiffness of the slab has improved by incorporating prestress in the concrete therefore the magnitude of peak displacement has reduced. Prestressed concrete (slab PC) has underwent 28% lesser peak displacement and has 23% higher peak reaction compared to reinforced concrete slab RC2.  Due to increase in the localized inertia effect the slab PC has reported 18% higher acceleration at the center of span compared with slab RC2.  Increase in the drop height of the impactor has resulted increase in the peak impact force, reaction, displacement and acceleration in the reinforced concrete slab. Acknowledgements Authors gratefully acknowledge the financial support provided by Science and Engineering Research Board, Department of Science and Technology, India through the research Grant no. SB/S3/CEE/0032/2014 for carrying out the present study. References Anil, O., Durucan, C., Erdem, R. T., Yorgancilar, M. A., 2016. Experimental and numerical investigation of reinforced concrete beams with variable material properties under impact loading. Constr Build Mater 125, 94 – 104. doi:10.1016/j.conbuildmat.2016.08.028. Foti, D., Paparella, F., 2014. Impact behavior of structural elements in concrete reinforced with PET grids. Mech Res Commun 57, 57 – 66. doi:10.1016/j.mechrescom.2014.02.007. Iqbal, M. A., Kumar, V., Mittal, A. K., 2017. Behaviour of Prestressed and Reinforced Concrete Plates Subjected t o Impact Loads Induced by Free Falling Indenter. Procedia Eng 173, 397 – 402. doi:10.1016/j.proeng.2016.12.037. Kumar, V., Iqbal, M. A., Mittal, A. K., 2017. Experimental investigation of prestressed and reinforced concrete plates under falling weight impactor. Thin-Walled Struct. doi:10.1016/j.tws.2017.06.028. Kumar, V., Iqbal, M. A., Mittal, A. K., 2017. Behaviour of Prestressed Concrete Under Drop Impact Loading. Procedia Eng 173, 403 – 8. doi:10.1016/j.proeng.2016.12.038. Mastali, M., Dalvand, A., Sattarifard, A., 2017. The impact resistance and mechanical properties of the reinforced self -compacting concrete incorporating recycled CFRP fiber with different lengths and dosages. Compos Part B Eng 112, 74 – 92. doi:10.1016/j.compositesb.2016.12.029.

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