ASSESSMENT OF IMPACT RESISTANCE PERFORMANCE OF POST-TENSIONED CURVED WALL USING NUMERICAL IMPACT SIMULATION

摘要

Current design of nuclear power plant containment building for aircraft impact is performed using the local damage assessment formulas suggested as the results of numerous researches based on limited cases of experimental tests performed around the world. However, these formulas were derived based on the experiments of flat reinforced concrete walls without post-tensioning; moreover, the formulas do not consider the effect of reinforcing bars. Therefore, application of the local damage assessment formulas to the curved post-tensioned concrete walls may result in excessive design. In this study, a 3D detailed finite element model of commercial passenger plane is utilized for numerical impact simulations. A total of four cases with two parameters such as wall shape of flat and curved, and consideration of post-tensioning force were included in this study. The depths of penetration and central displacement calculated from the numerical simulations were compared and analysed. As the results of the numerical simulations of this study, penetration depth and maximum central displacement were reduced approximately 10% ~ 30% by considering the effect of curvature and post-tensioning force.