Effect of Reinforcement Size on Concrete Crack Width with the Same Reinforcement Ratio

摘要

The quantitative influence of tensile steel bars size on the concrete crack width is analyzed. According to the engineering experience, the smaller diameter steel bars are superior to the bigger ones with the same reinforcement ratio consideration. However, the quantitative analyses have not been well treated. The criterion of "element with the maximum tensile stress will crack" and classic formula of the crack width in "Design code for hydraulic concrete structures", are combined to analyze the uniaxial tensile specimens. Finally, three conventional diameters of tensile steel bars (14, 16 and 20 mm) are adopted to verify the finite element model (FEM), and the quantitative analyses can be employed to the engineering reinforcement design.