爆炸荷载下CFRP加固圆柱的动力响应和破坏机理  

Dynamic Responses and Failure Mechanism of Reinforced Concrete Cylindrical Column Wrapped with CFRP Under Blast Loading

作　　者：潘金龙[1] 罗敏[2] 周甲佳[2] 

机构地区：[1]东南大学混凝土及预应力混凝土教育部重点实验室,南京210096 [2]东南大学土木工程学院,南京210096

出　　处：《天津大学学报》2010年第9期755-761,共7页Journal of Tianjin University(Science and Technology)

基　　金：教育部博士点基金资助项目(20070286024);国家自然科学基金青年基金资助项目(50808043);东南大学优秀青年教师资助计划资助项目(4005001067)

摘　　要：针对钢筋混凝土圆柱,采用ANSYS/LS-DYNA软件对其进行爆炸模拟分析,比较了不同炸药当量下未加固圆柱的力学性能、破坏机理和动力响应.然后针对2种典型的破坏模式采用3种CFRP加固方式进行爆炸模拟分析,对比分析了不同加固方式下圆柱的抗爆性能.计算结果表明,在局部合理设计碳纤维布包裹方式可与全柱高包裹达到基本相同的加固效果,显著减小圆柱在爆炸荷载作用下的侧向位移,有效提高圆柱的整体承载能力和抵抗局部破坏的能力,为实际工程的抗爆设计提供了理论依据.In this paper,dynamic features,failure mechanism and dynamic responses of un-strengthened reinforced concrete（RC） cylindrical columns in explosion have been simulated with the software ANSYS/LS-DYNA and compared under different blast loadings.Based on the two typical failure modes,three ways of strengthening with CFRP were adopted in explosion simulation analysis and the blast resistance under different strengthening manners was compared.Calculation results demonstrate that the columns locally wrapped with CFRP with optimal design can have similar antiknock properties with those fully wrapped,with significantly decreased displacement under explosive loading and improved load carrying capacity and local failure resistance.The analysis results provide theoretical foundation for blast resistance design of concrete structures.

关 键 词：钢筋混凝土圆柱 CFRP 抗爆性能 破坏模式 动力响应 

分 类 号：TU375.2[建筑科学—结构工程]