Study on Impact Resistance of Pc Beams with Buffer Layer Made of Ductile Fiber Reinforced Cementitious Composites

In concrete structures such as road facilities, harbor facilities, sediment control dams, and others, impact loads sometimes act directly on members. Load bearing capacity, toughness and displacement recovery properties are important, and should be evaluated appropriately. Recently, to prevent the spalling of concrete portions is also one of the important requirements for concrete structures. There are many papers [1-5] discussed the impact resistance of concrete members by using smaller specimens. Simplest impact test is "repeated impact drop-weight test [6]". In this test, the number of blows necessary to cause prescribed levels of distress in the test specimen is the main parameter, and the drop-height is kept constant. Relative impact resistance of different materials can be evaluated by this testing method. However, this testing method cannot be applied to the evaluation of relative impact resistance of different structural types. Using a buffer layer is effective method to improve the impact resistance. For instance, there are three requirements of buffer layers as follows;