静态破碎的物理与数值试验

Physical experiment and numerical simulation on effect of soundless cracking agent

本文对静态破碎剂作用下混凝土模型的破坏过程进行了物理和数值模拟试验,试验研究结果表明,单孔方形混凝土模型裂纹的扩展和破坏不是通常认为的像开采中的大理石破坏那样:第一条裂纹产生以后,在其对称连线上产生第二条裂纹,而是以三条主裂纹的形式破坏。并用数值模拟的方法再现了在静态破碎剂作用下,这三条主裂纹的萌生、扩展到最后的失稳扩展过程。

In the present paper, the physical experiments and numerical simulations on the failure of concrete model were carried out to investigate the effect of SCA (soundless cracking agent). The test results show that the failure pattern of the concrete model with a single hole is not similar to the excavating marble, where a second crack initiated on the symmetric point after a crack formed in the model as commonly considered, but three main cracks formed in the model. In addition, the numerical results reproduced the whole process of the crack initiation, propagation, and coalescence.