Experimental Study and Numerical Simulation of Damage Mechanism of RC Box Girder under Internal Blast Loads

Abstract

To obtain the failure mode and damage mechanism of a RC box girder under internal blast loads, the dynamic response process of the RC box girder under internal blast loads was carried out in an experiment and numerical simulation. The results show that after the blast, the failure morphology of the numerical simulation was in good agreement with that of the experiment. The front-face surface of the top slab was damaged by a compressive wave, and the back-face surface was damaged by a tensile wave. There were obvious transverse cracks at the joint between the web and the top slab (bottom slab), and there were many vertical cracks in the web. A large area of penetrating damage occurred in the center of the bottom slab.