Fire-resistance enhancing method for the high strength concrete structure

摘要

Disclosed is a method of enhancing fire resistance of high-strength concrete by mixing a spalling reducer (fiber cocktail) into the concrete to control spalling and performing shear reinforcement of main steel bars using shear stiffeners based on a wire rope and spacers.

主权项

1. A method of enhancing fire resistance of high-strength concrete, comprising: mixing a fiber cocktail, which is a hybrid of a polypropylene fiber and a steel fiber, into the high-strength concrete; installing support spacers between corner main steel bars of a reinforced concrete structure in a diagonal direction; fixing one of eyes of a wire rope, which are formed by binding opposite ends of a body of the wire rope with clips in a loop shape, to one of the corner main steel bars, winding the body of the wire rope around each corner main steel bar one turn so that the body of the wire rope is disposed inside the other main steel bars, winding the body of the wire rope around other main steel bars excluding the corner main steel bars in a closed shape, and fixing the other of the eyes of the wire rope to another corner main steel bar located diagonally across from the corner main steel bar to which the one of the eyes of the wire rope is fixed.