底部内爆作用下钢框架的连续倒塌分析  

Progressive Collapse Analysis of Steel Frames under Explosive Loading at Bottom of the Structure

作　　者：谢丽萍 于海丰[2] 郝红红 陈世玺 黄友强 XIE Liping;YU Haifeng;HAO Honghong;CHEN Shixi;HUANG Youqiang(State Nuclear Electric Power Planning Design&Research Institute Co.,Ltd.,Beijing 100095,China;School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;Hebei Top Architectural Design Co.,Ltd.,Shijiangzhuang 050051,China)

机构地区：[1]国核电力规划设计研究院有限公司,北京100095 [2]河北科技大学建筑工程学院,石家庄050018 [3]河北拓朴建设设计有限公司,石家庄050051

出　　处：《结构工程师》2018年第5期66-73,共8页Structural Engineers

基　　金：国家自然科学基金(512089169);河北省自然科学基金(E2014208115)

摘　　要：随着近几年恐怖分子袭击事件的频繁发生,钢结构建筑的防恐防爆能力已引起人们的广泛关注。首先划定了直接受爆区域,基于ABAQUS/Explicit,对爆炸荷载作用于结构底层室内地面不同位置时的钢框架结构进行了连续性倒塌响应分析。结果表明:划定直接受爆区后,钢框架的连续倒塌受爆炸作用位置影响较大,受炸药量的影响较小,爆炸位置位于结构的角部时最危险。爆炸荷载对钢框架结构的影响是否具有局部性和弱传递性和爆炸位置有关。综上建议,为考虑爆炸荷载对结构的影响,结构角部区域构件设计时应予以加强。With frequent terrorist attacks in recent years,the ability to prevent explosive terrorist attack of the steel structure has aroused widely concern.In this paper,the area directly affected by explosion load was delineated firstly,and then,based on the Abaqus/Explicit dynamic analysis,the progressive collapse response of the steel frames under various explosive loading conditions was studied,in which the explosive loadings were set at indoor ground of the bottom of the structure.The results show that,comparison with the quantity of explosive,the location of the explosive load has great influence on the progressive collapse of the steel frame structure.The most dangerous location of the explosive load is the corner of the structure.The location of the explosive load determines whether the effect of the explosive load on the structure collapse has locality and weak transitivity property or not.Based on above discussion,in order to consider the effect of the explosive load on the structure,the members located at the structure corners should be strengthened in structural design.

关 键 词：钢框架结构 连续倒塌 爆炸冲击荷载 显示动力分析 

分 类 号：TU391[建筑科学—结构工程]