[1157] NUMERICAL APPROACH TO DEMONSTRATE FLEXURAL FAILURE BEHAVIOR OF 3D PRINTED RC BEAMS WITH AND WITHOUT FIBERS
Keywords:3D concrete printer、3DCP、fiber reinforced concrete、flexural performance
3D concrete printing (3DCP) technology is rapidly growing; therefore, an accurate numerical modeling approach is needed to predict the structural performance of members. In this research, numerical analysis approach based on three-dimensional rigid body spring model (3D RBSM) is proposed to simulate flexural behavior of 3D printed reinforced concrete (RC) beams with and without short fibers. The proposed 3D RBSM can reproduce experimental results that not only include load-displacement response but also capture fracture behavior, including crack patterns. It was clarified that the addition of short fibers can improve stiffness just after the initial cracking. The ductility of the beam was, however, significantly decreased due to delamination of the filaments.