DEFORMED BAR FOR ENHANCING BOND STRENGTH

摘要

The present invention relates to a deformed bar for enhancing bonding strength which forms a plurality of first and second nodes of different heights on an outer circumferential surface of a steel bar in an angle to significantly increase bonding strength over the entire length of a deformed bar to improve performance of bonding with concrete. The deformed bar for enhancing bonding strength according to the present invention comprises: a steel bar having a circular cross section; a plurality of first nodes which protrude on an outer circumferential surface of the steel bar at regular intervals and are separated from each other; and a plurality of second nodes which protrude on the outer circumferential surface of the steel bar, are disposed between adjacent first nodes, and are shorter than the first nodes. The first and the second nodes are formed in an inclination angle with an axis in a longitudinal direction of the steel bar. Ribs are formed on both sides of the steel bar in the longitudinal direction. The first nodes and the second nodes are divided into an upper portion and a lower portion by the ribs, and the upper portion and the lower portion are separately formed. One of the first nodes and one of the second nodes are disposed on the upper and the lower portion on a single cross section, and thus the cross sectional area over the entire length of the deformed bar remains constant.