摘要
为进一步提升现有防护结构的抗爆性能,将双钢板混凝土(steel-concrete-steel,SCS)组合板与吸能材料结合,提出了一种双钢板-泡沫填充方钢管吸能结构。基于LS-DYNA软件建立了爆炸荷载作用下吸能结构的有限元模型,通过前期研究结果验证了该有限元模型的合理性。通过有限元模拟获得了吸能结构在近距离爆炸荷载下的变形过程、破坏模式及耗能性能,探究了爆炸距离、炸药当量、混凝土厚度、方钢管边长及方钢管厚度对吸能结构抗爆性能的影响。结果表明,在近距离爆炸荷载下,SCS组合板产生了弯曲变形及剪切破坏,泡沫填充方钢管产生了明显的叠缩变形并有效地耗散了爆炸能量。爆炸距离减小及炸药当量提高时,吸能结构的耗能能力进一步提升;方钢管边长及方钢管厚度对吸能结构的耗能能力影响不大。
To further improve the blast resistance of existing protective structures,this study proposes a novel double steel plate-foam-filled square steel tube energy absorbing structure by integrating a steel-concrete-steel sandwich panel with energy-absorbing materials.A finite element model of the energy absorbing structure under blast loading was established using LS-DYNA software,and its validity was verified by comparisons with prior research results.Finite element simulations were conducted to investigate the deformation process,failure mode,and energy absorption performance of the structure under close-in explosions.Key parameters influencing blast resistance,including standoff distance,TNT equivalent,concrete thickness,cross-sectional side length,and wall thickness of square steel tubes,were systematically analyzed.The results demonstrate that under close-in explosions,the steel-concrete-steel sandwich panel exhibited flexural deformation and shear failure,while the foam-filled square steel tubes underwent significant progressive buckling deformation,effectively dissipating blast energy.The energy absorption capacity of the structure increased with reduced standoff distances and elevated TNT equivalents.However,variations in the cross-sectional side length and wall thickness of square steel tubes exhibited negligible effects on energy dissipation capacity.
作者
许华南
谷立全
王永辉
陈华明
邱发强
邱巧玲
XU Huanan;GU Liquan;WANG Yonghui;CHEN Huaming;QIU Faqiang;QIU Qiaoling(School of Resource Engineering,Longyan University,Longyan 364012,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Fujian Dahuaxin Construction Engineering Co.,Ltd.,Longyan 364012,China;College of Port and Coastal Engineering,Jimei University,Xiamen 361021,China)
出处
《地震工程与工程振动》
北大核心
2025年第6期183-193,共11页
Earthquake Engineering and Engineering Dynamics
基金
福建省自然科学基金面上项目(2023J01958)。
关键词
吸能结构
抗爆性能
动态响应
组合结构
薄壁结构
泡沫填充钢管
energy absorbing structure
blast resistance performance
dynamic response
composite structure
thin-walled structure
foam-filled steel tube
