Abstract
A series of anti-explosion tests were performed on H-type high strength steels (Q460JSC and HQ600) and ordinary steels (Q345B) to address the problem of anti-explosion in the technical application of high strength steel. The dynamic behavior of steel beams during explosion and the propagation of shock waves were analyzed. The effects of proportionate distance, steel strength, high-span ratio, section shapes were investigated. The finite element software (ANSYS/LS-DYNA) was used to analyze the anti-explosion performance of high strength steel beams. The finite element models which adopted modified Johnson–Cook constitutive model and damage criterion were validated by comparing with the experimental results. The influence factors of anti-explosion performance of high strength steel were explored by numerical simulation as well. The results reveal that under near-explosion conditions, the peak values of overpressure predicted by empirical formulas are often less than the experimental outcomes. As the scaled distance reduces, the damage to the steel beam increases, making it more prone to local fracture. By decreasing the scaled distance, increasing the high-span ratio, and strengthening the constraint of H-type steel beam, the deformation and damage of steel beams can reduce. The results provide an effective basis to evaluate the safety of high strength steel beams applied in practical engineering when subjected to explosion.
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Acknowledgements
This work was supported by Natural Science Foundation of China, Grant No. 51708549. The authors would like to thank Xi’an Modern Chemistry Research Institute for the technical support of explosion test.
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Feng, X., Liu, X., He, Z. et al. Dynamic Response of High Strength Steel Beams Subjected to Explosion Induced Blast Load. Int J Steel Struct 23, 1551–1575 (2023). https://doi.org/10.1007/s13296-023-00787-3
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DOI: https://doi.org/10.1007/s13296-023-00787-3