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| Research on the Numerical Simulation of Dynamic Mechanical Behaviors of Concrete Subjected to Impact Loading |
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Abstract SHPB with the diameter of 74mm was used to study the dynamic mechanical properties of cement mortar and concrete under different impact velocities. The influence of impact velocity on the mechanical properties of concrete was analyzed. The dynamic response of concrete was simulated, which was loaded by rigid slab. The simulation results agreed well with experimental results. Numerical simulation shows that the peak stress of concrete increases with impact velocity, so concrete is rate-dependent. With the increase of the volume fraction of coarse aggregate, the peak stress of concrete increases firstly, then declines. When the volume fraction of coarse aggregate is equal to 40%, the peak stress of concrete is maximum value. Under the condition that the maximum diameter of coarse aggregate is kept unchanged, the peak stress of concrete declines with the minimum diameter of coarse aggregate. However, under the condition that the minimum diameter of coarse aggregate is kept unchanged, with the increase of the maximum diameter of coarse aggregate, the peak stress of concrete increases firstly, then declines, which provides theoretical guidance for the engineering application of concrete
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Received: 07 November 2014
Published: 28 April 2015
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2015, Vol. 36 
