CAJ | 학술논문

本文借助于通用显式动力分析软件LS-DYNA,采用流固耦合方法,分别对具有相同含钢量的双层钢板混凝土组合简支板和钢筋混凝土简支板两种结构在爆炸冲击载荷作用下的动态响应进行了数值模拟,其中空气和炸药采用ALE网格,简支板采用Lagrange网格,炸药采用JWL状态方程。通过对比分析,得到如下结果：在本文给定的计算条件下,当爆炸距离为0.5 m时,双层钢板混凝土组合简支板中心最大位移明显小于传统的钢筋混凝土简支板,具有更好的抗爆性;当爆炸距离增大到5 m时,两种简支板中心最大位移趋于一致;在爆炸冲击载荷作用下钢筋混凝土板下层出现明显的剥落,而由于钢板的约束,双层钢板混凝土组合简支板并未出现剥落现象。
본문차조우통용현식동력분석연건LS-DYNA,채용류고우합방법,분별대구유상동함강량적쌍층강판혼응토조합간지판화강근혼응토간지판량충결구재폭작충격재하작용하적동태향응진행료수치모의,기중공기화작약채용ALE망격,간지판채용Lagrange망격,작약채용JWL상태방정。통과대비분석,득도여하결과：재본문급정적계산조건하,당폭작거리위0.5 m시,쌍층강판혼응토조합간지판중심최대위이명현소우전통적강근혼응토간지판,구유경호적항폭성;당폭작거리증대도5 m시,량충간지판중심최대위이추우일치;재폭작충격재하작용하강근혼응토판하층출현명현적박락,이유우강판적약속,쌍층강판혼응토조합간지판병미출현박락현상。
The dynamic response of Bi-Steel slab and reinforced concrete slab which with the same steel content under blast loading was simulated using the finite element software LS-DYNA in this paper. The fluid-solid coupling method is used to simulate the interaction between explosive products and the slab. Through comparative studies, the main conclusions are: Under the condition in this paper, the maximum displacement in the center of the Bi-Steel slab is significantly smaller than the maximum displacement of the reinforced concrete slab when the explosive distance is 0. 5 meter; when the explosion distance increases to 5 meter, the maximum displacement in the center of the two kinds of simply supported plate are similar. And only the concrete of the back of reinforced concrete slab is peeled under blast loading. Bi-Steel slab has better antiknock property.