Double-K fracture analysis on polypropylene fiber reinforced concrete beams with standard three-point bending

摘要

Development of polypropylene fiber reinforced concrete very rapidly, and has been widely used, but there is a few research on the fracture properties of polypropylene fiber concrete at home and abroad, and can't meet the need of project. This paper introduced the double K fracture criteria of plain concrete, and considering the softening properties of polypropylene fiber reinforced concrete, and revising the relevant parameters in accordance with differences between plain concrete and polypropylene fiber reinforced concrete, which are suitable for the double-K fracture parameters of polypropylene fiber reinforced concrete beams with standard three-point bending.