Patent ID: 8166717

Claim:
A stiffener for connecting a prestressed concrete beam, comprising: a buried stiffener that is installed on an end face of the prestressed concrete beam covered with concrete so as to protrude inwards from substantially a middle of the end face of the prestressed concrete beam to transmit a stress transmitted from the prestressed concrete beam, and that has shear connectors disposed on two opposite sides of the buried stiffener so as to extend into the prestressed concrete beam; an end face stiffener that is connected to a front face of the buried stiffener, that is installed so as to be in contact with the end face of the prestressed concrete beam, and that has shear connectors so as to extend into the prestressed concrete beam; a bottom face stiffener that extends from a lower portion of the end face stiffener to be integrally installed on a bottom face of the prestressed concrete beam, and that has shear connectors so as to extend into the prestressed concrete beam, wherein the bottom face stiffener is perpendicular to the buried stiffener; and a joint stiffener that is formed in a plate shape, and that protrudes from a front face of the end face stiffener in a lengthwise direction of the prestressed concrete beam, wherein the buried stiffener, the end face stiffener, the bottom face stiffener, and the joint stiffener are fabricated in one piece.