摘要
把能够体现岩体在冲击载荷作用下的响应特点及损伤演化的各向异性特征的损伤模型嵌入到有限元软件中,模拟了含有预制裂纹的水泥砂浆试块在爆炸载荷作用下的损伤特征。模拟结果表明,在爆炸近区产生一个损伤“重灾区”,并可根据模拟结果确定“重灾区”及爆炸损伤的范围,模拟结果与试验结果基本一致。模拟方法可以为岩土工程中经历过爆炸损伤岩体的稳定性研究提供理论依据。
A damage model that can reflect characteristics of impact load and anisotropic damage evolution has been embedded into FEM software; and the damage characteristics of cement mortar block with prefab cracks under blasting have been simulated. The results of research indicate that a serious damage zone exists nearby blasting hole. The range of the serious damage zone can be determined by the simulating results. The simulating results are similar to the one from test. So, the method proposed can provide theoretical evidences for stability analysis of rock that has been disturbed by blast loading in geotechnical engineering.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第2期279-282,共4页
Rock and Soil Mechanics
关键词
水泥砂浆试块
预制裂纹
爆炸载荷
损伤演化
损伤模型
数值模拟
cement mortar block
prefab cracks
blast loading
damage evolution
damage model
numerical simulation
