摘要：The dynamic behavior of the concrete by blast is studied by numerical and experimental methods The Holmquist-Johnson-Cook model (HJC) is introduced for modeling the dynamic behavior of concrete. A concrete sample under impact compressive loading during the Hopkinson pressure bar (SHPB) test is modeled to calibrate the Holmquist-Johnson-Cook model. The stress propagation and the stress-strain curves indicate that the HJC model can well represent the dynamic properties of the concrete. Jones-Wilkens-Lee (JWL) equation of state (EOS) then is introduced to model the interaction behavior between the detonation products and the surrounding rock mass. Then stress distribution of the cubic concrete by blast has been obtained and the concrete fracture and fragmentation process has been achieved by experimental study. It is concluded that the HJC model and JWL model together can well model the dynamic behavior of the concrete by blast. The modelled results by blast can well explain the concrete fracture and fragmentation process.
关键词：dynamic behavior of concrete; fracture and fragmentation; blast; numerical model
