Experimental Study on Impact Resistant Behavior of Prototype PRC Beams

In order to establish an impact resistant design method on Prestressed Reinforced Concrete (PRC) type rock-sheds, prototype weight falling impact test is conducted for of PRC beams Here, tensioning ratio per one PC strands and reber volume are taken as variables. In this paper, using two steel weight two kinds of loading methods are applied which are: iterative loading method with initial 1 m falling height and increment of 2.5 m falling height; and single loading method with the same height to the final one of the iterative loading Results obtained from these experiments are as: 1) the load-displacement hysteresis loop for all types considered here forms an isosceles triangle which means that PRC beams tends to be collapsed with shear-failure mode; 2) the PRC beams prestressed with 50 % tensioning ratio has the best impact resistant performance all types considered here; and 3) upgrading of impact resistant capacity cannot be expected by increasing rebar ratio