侧向冲击下ＣＦＲＰ 缠绕加固ＲＣ 悬臂柱 动态响应的有限元分析

This paper established finite element models of cantilever reinforced concrete (RC) columns wrapped with carbon fiber reinforced composites (CFRP) under lateral impact loading by using a LS-DYNA software. Numerical results were compared with experimental results obtained from the literature to validate the rationality of the modeling method. A series of parametric analysis were conducted to study the effects of column axial compression ratio, the number of CFRP wraps, impact velocity and impact mass on dynamic responses of strengthened RC columns. The results show that: (1) The column axial compression ratio from 0 to 0.2 has little effect on damage pattern, the first peak of impact force and lateral displacement of CFRP-wrapped RC columns. (2) The number of CFRP wraps can effectively control the shear damage and reduce the lateral displacement. (3) The impact velocity has a greater influence on the first peak of impact force and lateral displacement of strengthened columns than impact mass. (4) Under the same impact energy, increasing impact mass will increase the lateral displacement but reduce the first peak of impact force.