| 爆炸排淤填石法中淤泥的本构模型 |
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| 作者单位： | ;1.武汉化工学院;2.湖北省路桥公司 武汉430073;3.武汉430056 |
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| 摘 要： | 以爆炸排淤填石法为背景 ,对不同应变率阶段淤泥的本构模型进行了分析 ,利用ANSYS/LS-DYNA动态有限元分析程序对所选择的模型进行验证和确认。计算和分析结果表明 :在形成爆炸空腔的高应变率阶段 ,淤泥表现为理想不可压缩流体的性质 ;在小药量小抵抗线条件下 ,甚至在淤泥自重作用下的较低应变率变形阶段 ,其黏性效应也可以忽略不计。
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| 关 键 词： | 爆炸排淤填石法 淤泥 理想弹塑性模型 宾汉体模型 |
DAMAGE MECHANISM OF ROCK SLOPE UNDER ACTION OF BLASTING VIBRATORY STRESS |
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| Affiliation: | , 2.Road and Bridge Company of Hubei Province,Wuhan 430056,China) |
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| Abstract: | The distribution of vibratory stress in rock slope is analyzed,and the formula of calculating vibratory stress is given.The mechanism of coupling action between vibratory stress and slope stress fields and cracks is discussed,and the damage propagation criterion of joints and cracks is put forward.Based on the theories of fracture and damage mechanics,the equivalent flexibility tensor of the jointed rock masses considering the vibratory stress is deduced.The results show that the flexibility tensor of the rock mass becomes larger and its strength becomes lower because of the blasting vibratory stress. |
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| Keywords: | Blasting vibratory stress Rock slope Damage mechanism Flexibility tensor |
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