Numerical evaluation of slab thickness effect on the impact behavior of concrete slabs reinforced with CFRP bars

الملخص EN

Theoretical investigation of the nonlinear behavior of concrete slreinforced with CFRP bars subjected to a single impact load is presented in this paper.

For predicting the impact load on a concrete slab, there are several methods, some of which are impractical or prohibitively pricey; however, due to significant technological advancements, simulation methods instead of experimental approaches have become common methods and a cost-effective matter for developing detailed responses.

The purpose of this paper is to numerically investigate the effect of slab thickness on the impact response of concrete slreinforced with (CFRP) bars when subjected to a single impacting load, so as to well understand their behavior which are considered modern topics and rarely highlighted.

Three specimens (1800×1800) mm, with three thicknesses 80, 130 and 180 mm, simply supported by their corners, have been modelled, one reference specimen of 130 mm thickness.

The reference slab numerically validated with an experimental work from literature under dropping-weight of 150 kg, it was a flat-nosed rigid steel (300*300*700) mm projectile, used to apply impacting load, which is falling freely from a height of 3.26 m.

To assess slab behavior, impact force-time, displacement-time and reaction force-time histories had been plotted and discussed.

The analytical results showed that slab thickness is a control factor and better performance in slreinforced with CFRP bars, can be achieved by increasing slab stiffness via its thickness Theoretical investigation of the nonlinear behavior of concrete slreinforced with CFRP bars subjected to a single impact load is presented in this paper.

For predicting the impact load on a concrete slab, there are several methods, some of which are impractical or prohibitively pricey; however, due to significant technological advancements, simulation methods instead of experimental approaches have become common methods and a cost-effective matter for developing detailed responses.

The purpose of this paper is to numerically investigate the effect of slab thickness on the impact response of concrete slreinforced with (CFRP) bars when subjected to a single impacting load, so as to well understand their behavior which are considered modern topics and rarely highlighted.

Three specimens (1800×1800) mm, with three thicknesses 80, 130 and 180 mm, simply supported by their corners, have been modelled, one reference specimen of 130 mm thickness.

The reference slab numerically validated with an experimental work from literature under dropping-weight of 150 kg, it was a flat-nosed rigid steel (300*300*700) mm projectile, used to apply impacting load, which is falling freely from a height of 3.26 m.

To assess slab behavior, impact force-time, displacement-time and reaction force-time histories had been plotted and discussed.

The analytical results showed that slab thickness is a control factor and better performance in slreinforced with CFRP bars, can be achieved by increasing slab stiffness via its thickness increase.