摘要
为研究爆炸荷载作用下RC深梁的动力响应及破坏形态,在以往对RC普通梁试验及数值分析研究的基础上,选择出合理的钢筋与混凝土模型并进行了验证。采用数值分析方法,利用LS-DYNA软件分别建立了简支单跨及连续RC深梁的有限元模型,研究其在不同比例距离爆炸荷载作用下的动力响应及破坏形态。研究发现,随着跨高比的减小RC深梁由弯曲破坏转变为剪切破坏,梁破坏程度逐渐降低。结论可为RC深梁抗爆研究及设计提供一定的理论依据。
In order to study the dynamic response and failure form of RC deep beams under blast load the reasonable model of reinforced bar and concrete was selected and verified on the basis of previous scholars experiments and numerical analysis of RC ordinary beams. Using numerical analysis method and LS-DYNA software the finite element models of simple-supported single-span and continuous RC deep beams were established respectively and the dynamic response and failure modes under blast load with different proportions of distances were studied. It was found that with the decrease of span-height ratio the bending failure of RC deep beams changed to shear failure and the damage degree of RC deep beams decreased gradually. The conclusions drawn in this paper provide a theoretical basis for the research and design of explosion resistance of RC deep beams.
作者
周清
孙亮
刘海员
Zhou Qing;Sun Liang;Liu Haiyuan(Urban Planning and Design institute of Binzhou ,256600, China)
出处
《特种结构》
2019年第5期31-38,43,共9页
Special Structures
基金
山东省住房城乡建设科技计划项目(2017-K4-007
2018-K5-001)
关键词
爆炸荷载
RC深梁
动力响应
破坏形态
跨高比
数值分析
Blast load
RC deep beams
Dynamic response
Failure form
Span-height ratio
Numerical analysis
