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本文通过对大骨料全级配水工混凝土的系列三点弯曲梁试验表明;混凝土缝端临介张开位移 COD 具有明显的尺寸效应,COD 不能作为控制混凝土失稳断裂的材料参数;骨料最大粒径 D_max对 COD 无明显影响。
In this paper, a series of three-point bending beam tests for hydraulic aggregates with large aggregates show that the COD of the concrete interfacial opening displacement has obvious size effect, and COD cannot be used as a material parameter to control the destabilized fracture of concrete; aggregates The maximum particle size D_max has no significant effect on COD.