FRP-混凝土-钢双壁空心柱的抗爆性能分析  

Antiknock Performance of Hollow-Core FRP-Concrete-Steel Columns

作　　者：王梓博 王乐雅 苏纪浩 王伟强 WANG Zibo;WANG Leya;SU Jihao;WANG Weiqiang(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150009,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150009

出　　处：《陆军工程大学学报》2024年第5期18-25,共8页Journal of Army Engineering University of PLA

基　　金：中央高校基本科研业务费项目(B220201029);江苏省自然科学基金(BK20220986)。

摘　　要：纤维增强复合材料(fiber reinforced polymer,FRP)-混凝土-钢双壁空心柱是一种新型混凝土组合柱,由外层FRP管、内层钢管及两管间填充的混凝土组成。针对FRP-混凝土-钢双壁空心柱在近场爆炸荷载下的抗爆性能进行了数值模拟。采用任意拉格朗日欧拉法(arbitrary Lagrangian Eulerian,ALE)进行建模,并基于已有的试验结果验证所建模型的准确性。利用验证后的数值模型,对爆炸冲击波传递过程、混凝土损伤发展、FRP管环向应变、爆炸后剩余力学性能以及参数进行了分析。结果表明,FRP管能有效约束爆炸区域内的夹层混凝土;爆炸后双壁空心柱的轴向承载力明显减小、轴向刚度明显下降;通过增加FRP管、钢管厚度,以及减小空心率能提高双壁空心柱的抗爆性能,其中前两项的影响更为显著。The hollow-core fiber reinforced polymer(FRP)-concrete-steel(HC-FCS)column is a new type of concrete composite column,which is composed of an outer FRP tube,an inner steel tube and a concrete filling between these two tubes.The numerical simulations were conducted to investigate the antiknock performance of the HC-FCS column subjected to close-in blast loads.The numerical model was established with the Arbitrary Lagrangian-Eulerian(ALE)method,and the accuracy of the established model was validated based on existing experimental results.With the validated numerical model,the propagation process of the explosion shock wave,the development of concrete damage,the hoop strain in the FRP tube,the residual mechanical properties after the explosion,as well as relevant parameters,were analyzed.The results demonstrate that the FRP tube is able to effectively confine the infilled concrete in the blast region during the close-in blast.Both the column's axial load capacity and axial stiffness are significantly decreased after the close-in blast.Increasing the thickness of FRP tubes and steel tubes,as well as reducing the hollow core ratio,can enhance the blast resistance of the HC-FCS column,with the first two factors having more significant effects.

关 键 词：FRP-混凝土-钢双壁空心柱 FRP管 近场爆炸 抗爆性能 损伤分析 

分 类 号：TU398.9[建筑科学—结构工程]