ABSTRACT
ABSTRACT: Recently, prestressed H-beam bridges with external unbonded tendons are increasingly built. The mechanical behavior of prestressed steel H-beams is different from that of normal bonded PSC beams in a point of the slip of tendons at deviators and the change of tendon eccentricity that occurs, when service load are applied in external unbonded steel H-beams. The concept of prestressing steel structures has been widely considered, in spite of long and successful history of prestressing concrete members. For this experiment, five different types of test pieces were applied. To evaluate the effectiveness of the reinforcement in case of external load, the ordinary H-beam was set as the standard test piece and the number of steel bars and stress level or eccentricity are set as the variable to study the dynamic characteristics through the flexural test of the H-beam.
