Abstract
This paper presents an estimation method of dynamic ductility of unbond prestressed concrete (PC) beam and prestressed reinforced concrete (PRC) beam under high speed loading. First, the static and high speed loading tests were performed in order to examine the elastic-plastic behaviors and ultimate limit state of bond and unbond PC and PRC beams, respectively. It is found that the ductilities of unbond PC and PRC beams are almost two times larger than those of bond PC and PRC beams under high speed loading. Second, a discrete model analysis method was developed for the estimation of dynamic ultimate limit states of bond and unbond PRC beams under high speed loading. The both values of dynamic load and ultimate deformation estimated by the proposed method are almost in good agreement with those obtained by the tests. Finally, the proposed dynamic analysis was applied to the estimation of dynamic ultimate deformations of prototype PRC beams.
