A numerical approach for computational crack analysis of concrete structures is presented, which is based on the energy criterion on crack initiation and extension. The new criterion takes the possible energy loss of each individual crack into account, and has…
A numerical approach for computational crack analysis of concrete structures is presented, which is based on the energy criterion on crack initiation and extension. The new criterion takes the possible energy loss of each individual crack into account, and has its definition built on the theory of homogenization. The energy balance during a fracturing process is also discussed, and the quantitative relation between the dissipated fracture energy and the change in strain energy immediately after cracking is established. By virtue of this concept, numerical approaches using load-control method become a straightforward process even when the snap-back instabilities are involved. The resulting model has been prov~d its capability and effectiveness for practi.cal use simulating the general structural behaviors after cracking, and predicting the failure loads of the structures which include water tunnels, sewers, etc.