龙渝川, 张楚汉, 周元德. 钢筋混凝土嵌入式滑移模型[J]. 工程力学, 2007, 24(增Ⅰ): 41-045.
引用本文: 龙渝川, 张楚汉, 周元德. 钢筋混凝土嵌入式滑移模型[J]. 工程力学, 2007, 24(增Ⅰ): 41-045.
LONG Yu-chuan, ZHANG Chu-han, ZHOU Yuan-de. EMBEDDED SLIP MODEL FOR ANALYZING REINFORCED CONCRETE STRUCTURES[J]. Engineering Mechanics, 2007, 24(增Ⅰ): 41-045.
Citation: LONG Yu-chuan, ZHANG Chu-han, ZHOU Yuan-de. EMBEDDED SLIP MODEL FOR ANALYZING REINFORCED CONCRETE STRUCTURES[J]. Engineering Mechanics, 2007, 24(增Ⅰ): 41-045.

钢筋混凝土嵌入式滑移模型

EMBEDDED SLIP MODEL FOR ANALYZING REINFORCED CONCRETE STRUCTURES

  • 摘要: 提出一种钢筋混凝土嵌入式滑移模型,将模拟钢筋-混凝土交界面的无厚度粘结单元嵌入到混凝土单元中,保证粘结单元上、下表面分别与混凝土、钢筋单元变形协调,尔后通过两表面位移差值表征钢筋滑移。基于虚功原理集成钢筋、混凝土和粘结单元的刚度贡献,建立了嵌入式滑移模型的有限元平衡方程。应用该模型分析钢筋混凝土简支梁破坏试验,获得的构件承载力、裂缝分布形态和破坏模式与试验结果接近。结果表明:嵌入式滑移模型在分析钢筋混凝土结构承载力和裂缝形态方面具有一定的应用前景。

     

    Abstract: An embedded slip model is presented for finite element analysis of reinforced concrete structures. The bond element simulating the interface of reinforcing bars and concrete is embedded into the concrete element. To obtain the relative slip, the top and bottom faces of the bond element are constrained to have compatible deformation with the concrete and the reinforcement element respectively. Using the virtual work principle, the equilibrium equation is obtained by assembling the stiffness of each component, i.e. concrete, reinforcement and bond element. Analyzing a testing reinforced concrete beam by the embedded slip model, the loading-capacity, crack distribution and failure mode are consistent with the experimental results. The numerical simulation shows that the embedded slip model can be applied to analyzing reinforced concrete structures.

     

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