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1.前言 混凝土属于脆性材料,其脆性随标号及材质(普通混凝土、轻质混凝土、多孔混凝土)的不同而变化.目前国内外对此尚未给出统一的公式.W.weibull建议的概率密度函数与混凝土材料的试验结果较为符合,本文从这一理论基础出发,研究了在相同条件下的混凝土试件的尺寸对断裂强度的影响,并对轴心受拉、轴心受压、受弯、偏心拉压构件进行了分析比较.关于骨料尺寸对强度的影响及如何用外延法求得大截面混凝土的强度等问题,仍需进一步讨论.
1. Introduction Concrete is a brittle material, and its brittleness varies with the number and material (ordinary concrete, lightweight concrete, porous concrete). At present, no unified formula has been given at home and abroad. Probability density function suggested by W.weibull Compared with the test results of concrete materials, this article starts from this theoretical basis and studies the influence of the dimensions of concrete specimens on the fracture strength under the same conditions, and the axial stress, axial compression, bending, The analysis and comparison of the eccentric tension and compression components are carried out. Further discussion is needed on the effect of aggregate size on strength and how to obtain the strength of large-section concrete using the epitaxy method.