摘要
运用LS-DYNA软件,通过在炸药底部布置预制破片,模拟冲击波与破片对钢筋混凝土梁的复合作用。分析了冲击波单独作用、破片单独作用以及冲击波与破片复合作用下钢筋混凝土梁动态响应的不同。仿真结果表明:在冲击波与破片联合作用下,结构的毁伤程度远大于冲击波单独作用时。并且在冲击波与破片复合作用下,结构的动态响应大于在冲击波单独作用和破片单独作用下动态响应之和。破片群不仅产生局部破坏,还会将动能传递给钢筋混凝土梁,从而使结构产生整体破坏。
In this thesis,the synergetic effects of blast wave and fragment on reinforced concrete beam are simulated by using LS-DYNA software by placing fragments at the bottom of the charge.Numerical simulation is used to analyze the different dynamic responses of different models.The dynamic responses of the reinforced concrete beam for blast loading,fragment loading and simultaneous loading are studied.The results show that the damage of the reinforced concrete beam subjected to simultaneous loading is severer than that subjected to blast loading alone.In addition,the response of the reinforced concrete beam under combined loading is bigger than if adding that under fragment and blast loading treated separately.Not only is local failure caused by fragment cluster,but integral damage is also caused by fragment cluster,which transfers the impulse to the structure.
出处
《石家庄铁道大学学报（自然科学版）》
2017年第3期6-11,19,共7页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
基金
国家自然科学基金(51178310
50678116)
关键词
冲击波
破片
复合作用
钢筋混凝土梁
blast wave
fragment
synergetic effects
reinforced concrete beam
