This paper presents analytical analysis of the dynamic behavior of reinforced and post- tensioned concrete slab strips with an ultra high performance fiber-reinforced concrete (UHPFRC) overlay in flexural compression. First, the dynamic equilibrium of 5 large-scale drop weight tests was…
This paper presents analytical analysis of the dynamic behavior of reinforced and post- tensioned concrete slab strips with an ultra high performance fiber-reinforced concrete (UHPFRC) overlay in flexural compression. First, the dynamic equilibrium of 5 large-scale drop weight tests was established to quantify inertia effects in the slab strips. The dynamic equilibrium demonstrated the significant influence of inertia effects during the first 20ms after the impact and allowed verification of consistency of several meas- urement systems. Then, a mass-spring model was used to determine equivalent static force-deflection curves for each test, which were compared to static test results on comparable slab strips. The slab strips with the UHPFRC overlay in flexural compression showed an increase in apparent strength of up to 18 % due to the dynamic effects. The study demonstrated that the advantageous material behavior of UHPFRC can be well exploited in structural members subject to impact-type loading.