含预制裂纹的水泥砂浆试块在爆炸载荷作用下损伤特征的数值模拟  

Numerical simulation of damage characteristics of cement mortar block with prefab cracks under blast loading

作　　者：刘军[1] 赵长冰[1] 

机构地区：[1]河海大学岩土工程研究所,南京210098

出　　处：《岩土力学》2007年第2期279-282,共4页Rock and Soil Mechanics

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.

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 

分 类 号：O347.1[理学—固体力学]