Residual Anti-Explosion Performance of The Corrugated Blast Wall For Offshore Platforms after Explosion

The study of multiple explosion resistance in offshore platform is important in the rescues of life and equipment. To evaluate residual anti-explosion performance of blast wall, numerical investigations are conducted suffering twice sequential blasts. Then comparison with analytical results under the single blast with the same impulse load is implemented. Results show that different from the single blast, the blast wall is bent as a fold after the second blast. There are three kinds of plastic hinge after the second blast due to the latent plastic hinge caused by the first blast. The prediction of residual ultimate resistance shows that additional plastic hinges strengthen the anti-explosion capability. The second blast evaluation is instructive to reinforce the structure and to set the passive plastic hinges