针对混凝土直接拉伸试验得到的混凝土轴心抗拉强度的试验数据进行分析,研究试件尺寸与粉煤灰对混凝土轴心抗拉强度与立方体抗压强度关系的影响,并给出建议计算式。通过试验数据回归分析,提出了混凝土轴心抗拉强度与混凝土立方体抗压强度的换算关系,并与国内外几种主要混凝土结构设计规范的相关建议计算式进行了比较。 According to the test data of the concrete axial tensile strength obtained from the concrete direct tensile test, the influence of the test piece size and the fly ash on the relationship between the concrete axial compressive strength and the axial compressive strength is studied. The calculation formula . Based on regression analysis of experimental data, the relationship between the axial tensile strength of concrete and the compressive strength of concrete cubes was proposed and compared with the recommended formulas of several major structural designs of concrete at home and abroad.