【摘要】 本文首先简要地介绍了混凝土双 K断裂准则。通过对不同试件形式、不同试件尺寸、不同厚度、不同体积、不同初始裂缝长度下起裂荷载、起裂韧度与最大荷载、断裂韧度关系的统计分析发现 :起裂韧度与断裂韧度并不是两个独立的材料参数。在混凝土软化模式一定的前提下 ,由其中的一个可以方便地推导出另一个更多还原

【Abstract】 This paper reviews the experimental base for double K criterion of concrete firstly, then according to the configuration, size, thickness, and initial notch of specimens, it analyzes the relationship between initial fracture toughness and unstable fracture toughness, as well as initial fracture load and peak load. At last, it is found that when the softening mode of concrete is known, it is easy to get one from another through the method proposed above.更多还原