Due to the complex effects of combined loadings on complete steel structures, the combined effects of high-velocity projectile impact and heat radiation due to a pool-fire on a vertical Q345 steel tank have not been generally considered. In this study, a consecutive coupling approach is established. The combined effects of projectile perforation and heat radiation on the failure modes and fire resistance of a vertical steel tank are investigated. Additionally, the effects of the projectile size, projectile shape, and separation distance are analyzed. The results indicate that compared with a fixed-roof tank without impact, the perforation results in stress concentrations in the plastic deformation zone. The stress level of the perforated tank is higher, and the fire resistance of the perforated tank is lower. Additionally, as the perforation size increases, the stress level triggering the thermal buckling of the perforated tank decreases outside of the plastic deformation zone. Additionally, the fire resistance decreases. Moreover, as the separation distance decreases, the stress level of the cylindrical shell increases. The fire resistance of the perforated tank decreases dramatically. By understanding the failure mode, this study is able to suggest fire and explosion protection measures in petrochemical industries to decrease or eliminate the domino effect risk and incident damage. Additionally, the fire resistance data can help improve guidelines and understanding for fire and rescue services, which would undoubtedly play a vital part in emergency response and rescue, and enhance the process safety level overall.

由于组合载荷对完整钢结构的复杂影响，在垂直Q345钢罐上由于池火引起的高速弹丸撞击和热辐射的组合效应尚未得到普遍考虑。在本研究中，建立了连续耦合方法。研究了弹丸射孔和热辐射对立式钢罐失效模式和耐火性能的综合影响。此外，还分析了弹丸尺寸、弹丸形状和间隔距离的影响。结果表明，与没有冲击的固定顶罐相比，穿孔导致塑性变形区应力集中。穿孔罐的应力等级较高，穿孔罐的耐火性较低。此外，随着穿孔尺寸的增加，在塑性变形区之外触发穿孔罐热屈曲的应力水平降低。此外，耐火性降低。此外，随着分离距离的减小，圆柱壳的应力水平增加。穿孔罐的耐火性急剧下降。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。在塑性变形区之外，触发穿孔罐热屈曲的应力水平降低。此外，耐火性降低。此外，随着分离距离的减小，圆柱壳的应力水平增加。穿孔罐的耐火性急剧下降。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。在塑性变形区之外，触发穿孔罐热屈曲的应力水平降低。此外，耐火性降低。此外，随着分离距离的减小，圆柱壳的应力水平增加。穿孔罐的耐火性急剧下降。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。此外，耐火性降低。此外，随着分离距离的减小，圆柱壳的应力水平增加。穿孔罐的耐火性急剧下降。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。此外，耐火性降低。此外，随着分离距离的减小，圆柱壳的应力水平增加。穿孔罐的耐火性急剧下降。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。通过了解失效模式，本研究能够提出石化行业的防火防爆措施，以减少或消除多米诺骨牌效应风险和事故损害。此外，耐火数据有助于提高对消防和救援服务的指导和理解，这无疑将在应急响应和救援中发挥重要作用，提高整体过程安全水平。