单轴压缩作用下岩石混凝土一体两介质体破裂过程数值模拟

Numerical Simulation of the Failure Process of Rock and Concrete Bi- material Specimen in Uniaxial Compression

运用岩石破裂与失稳过程分析RFPA2D系统,结合实验室试验对岩石混凝土一体两介质体单轴压缩作用下的破坏过程进行了数值模拟研究,其模拟结果再现了岩石混凝土一体两介质体破坏的全过程及其声发射分布规律。结果表明:一体两介质模型表现为一体特性,强度低的混凝土材料首先出现裂缝,裂缝逐渐扩展穿越混凝土与砂岩两种介质的界面,两介质协同横向变形,最终一起破坏。

The newly developed software-Rock Failure Process Analysis(RFPA) was used to study the damage property of rock and concrete bi-material under uniaxial compression. The phenomena of progressive failure and law of acoustic emission distribution in rock and concrete bi-material were numerically investigated. The result obtained indicates: the bi-material model behaves as unity character, cracks first appear in low-strength concrete media, and with the increase in load propagation the cracks cross the interface of the two medium, the two medium' lateral deformation occurs and finally the two medium breaks together. RFPA2D can better simulate the failure process of rock and concrete bi-material.