Abstract
Experiments were conducted to test the hypothesis that high-velocity impact by a “soft missile” may cause shear failure of small-scale reinforced concrete (RC) beams proportioned to fail in flexure under static load. Elements designed to develop flexural mechanisms under static load have been observed to fail in shear under blast or impact by a solid object. But there is limited publicly-available evidence indicating that a change in the failure mechanism associated with an increase in the loading rate may occur under high-velocity impact by a soft missile. Small-scale RC beams were subjected to impact of thin-walled aluminum containers filled with water. The projectile used serves as an analog for what has been reported to represent key aspects of the impact of an airplane wing on RC elements. In the reported tests, high-velocity impact by a mass of liquid led to shear failures in specimens proportioned to develop flexural mechanisms under static load.
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