科研之友
微信
新浪微博
Facebook
分享链接
摘要
Here, to study anti-progressive collapse performance of building structure under blast load, the finite element software ANSYS/LS-DYNA was used to study the anti-progressive collapse dynamic effect of reinforced concrete (RC) beam-slab substructure under blast load，and expansively analyze parameters，such as，concrete strength， reinforcement ratio and span-height ratio. The results showed that blasting to remove column simulated by using instantaneous column removal can cause conservative or higher residual load-bearing capacity and local damage of structure ; concrete strength has a significant impact on the anti-progressive collapse dynamic effect of structure，when concrete strength is larger than C40，pressing film and arch pressing mechanisms of structure are enough to prevent progressive collapse happening ; increase in reinforcement ratio has little effect on resistance of arch pressing mechanism， but can significantly improve resistance of catenary mechanism ; span-height ratio has a significant impact on development of structural resistance mechanisms，decrease in span-height ratio can improve resistance of arch pressing and pressing film mechanisms, but have little impact on resistance of catenary mechanism.
- 单位
