大体积混凝土等效裂纹断裂模型研究

Study on the equivalence crack fracture model for large volume concrete

根据大比尺混凝土紧凑拉伸与楔入劈拉试验成果 ,将裂纹在稳定扩展中断裂过程区应力分布与相应的变形 (张开度ω )联系起来 ,通过“归一化”处理 ,得到了大体积混凝土断裂过程区长度的解析表达式 ,建立了大体积混凝土 型断裂破坏的等效裂纹断裂模型。

According to the results on large scale specimens, an equivalence crack fracture model for large volume concrete is built, linking the stresses attribution on fracture process zone with the softening rules of the main crack when it is steady opening, by means of normalization. A formula for large volume concrete describing the length of fracture process zone has been given.