This study presents the performance of carbon textile reinforcement used as strengthening layers for reinforced concrete (RC) slabs under repeated impact loads. In order to reveal the contribution of carbon textile reinforcement to the behavior of RC slabs under impacts, five identical RC slabs with the dimensions of 1.5 m × 1.5 m × 0.20 m were manufactured and tested at the Technische Universität Dresden. To understand failure mechanisms of RC slabs under impact loadings, two specimens were kept unstrengthened and tested under different impact velocities. The rest of the specimens was strengthened with three different carbon textile reinforcements embedded in an additional 2 cm fine‐grained concrete layer and subjected to impact loads with the same striker velocity. The results observed from the tests revealed that the carbon textile reinforcement is very effective at increasing the impact capacities of the specimens. Additionally, displacement–time histories and crack profiles are highly affected due to the carbon textile reinforcement types and ratios during the impact loadings.
A test series of 15 reinforced concrete (RC) plates was carried out in the drop tower of the Otto Mohr Laboratory of Technische Universität Dresden. In these tests, the structural behavior of RC plates of different thicknesses was investigated under impact load. Within this report, the investigated specimen and the used drop tower facility are introduced. Furthermore, the experimental program and the experimental results will be shown. Following, the influence of different thicknesses and impact velocities are presented and discussed. The different damage levels of the RC plates influenced by the specific variation of the impact speed form a very good basis for further investigations in this scientific field. Especially the view into the plates, which was made possible by saw cuts, extends the understanding of the impact behavior considerably.
31 January 2022 in Construction and Building Materials