Velocity Controlled Dynamic Analysis for Prediction of Dynamic Toughness of Post-tension Prestressed Reinored Concrete Beam

Abstract

This paper presents a velocity controlled dynamic analysis to predict the dynamic toughness of post-tension prestressed reinforced concrete beam. In order to evaluate properly the flexural resistance and ultimate deformation under a dynamic loading condition, the velocity controlled dynamic analysis method is proposed. Since the displacement velocity of he loading point is controlled constantly, the flexural resistance of the beam can be evaluated with the negligibly small vibration effect caused by the inertia force. In addition to the rate effect materials, the increment of the bond-slip stress between the PC tendon and the concrete under dynamic deformation condition is also taken into account. The proposed method is verified by comparing with the high speed loading test results in this paper.