Review of time-dependent fracture model of concrete

Abstract

The integrity of concrete structures under strong earthquakes and the stability of concrete structures with cracks are concerns of national security strategies.These two issues are closely related to the time-dependent fracture behavior of concrete.The time-domain dependent fracture behavior of concrete can be generalized into two aspects: short-term impact fracture under dynamic impact load and long-term steady-state creep fracture failure.Although they both are related to time, there is a huge difference in the loading time, which leads to the different internal mechanism of dynamic failure in concrete.Herein, the development history and main achievements of time-dependent fracture model of concrete are reviewed, including macroscopic fracture mechanics model and method, mesoscopic fracture mechanics model and method, dynamic fracture, and creep fracture behavior of concrete.

Keywords

• concrete
• impact fracture
• damage
• creep fracture