摘要
混凝土在四点剪切加载条件下 ,断裂试件失稳基本上为Ⅱ型 ,随着裂纹的扩展 ,裂纹会出现分叉、偏斜 ,就存在断裂路径选择问题 ,当裂纹由水泥砂浆垂直入侵骨料时 ,裂纹可能穿过骨料扩展或绕过骨料沿界面扩展 .该文建立了四点剪切加载条件下 ,裂纹扩展路径选择模型 ,并以实验进行验证 .
In previous analysis of fracture performance of concrete, concrete in taken as isotropic material in macroscopic, but in microcosmic, we cannot neglect its complexity. In a four-point beam, the initial crack of specimen of concrete is roughly type Ⅱ. But a propagating crack may branch or deflect. This paper systematically studied the crack propagation path. A path selection model is presented and verified by experiments. Which gives a qualitative methodology for the assessment of fracture toughness of various mortar/aggregate systems.
出处
《固体力学学报》
CAS
CSCD
北大核心
2004年第2期198-202,共5页
Chinese Journal of Solid Mechanics
