Abstract
In one construction method involving precast prestressed concrete (PCaPC) beams with a pretensioning system, high strength deformed bars are used instead of prestressing strands. Prestress can be effectively introduced near the bottom of the beam, which can make it lighter with less prestressing steel. It becomes important to clarify how much the bond splitting strength of the surrounding concrete is, because PCaPC beams fail from bond splitting in the prestressing process under the high bond stress. A bond test was carried out to examine the bond characteristics in the anchorage region of PCaPC beams using high strength deformed bars. As a result, the anchorage length and the bond splitting strength of high strength deformed bar for prestressing were clarified.
