| 宛新林*,聂细江,席道瑛.岩石对冲击波的非线性动态响应[J].实验力学,2010,25(3):346~352 |
| 岩石对冲击波的非线性动态响应 |
| On the Nonlinear Dynamic Response of Shock Wave in Rock |
| 投稿时间：2010-03-05 修订日期：2010-03-31 |
| DOI： |
| 中文关键词: 饱和岩石 多次冲击实验 应力波衰减和弥散 动态模量 冲击压实效应 |
| 英文关键词:saturated rock multi-impact test stress wave attenuation and diffusion dynamic modulus impact compaction effect |
| 基金项目:国家自然科学基金（40474065，40874093）；2008安徽省级土木工程教学团队资助项目 |
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| 中文摘要: |
| 对干燥、饱水、饱泵油大理岩和饱和砂岩进行了SHPB冲击压缩实验，得到了干燥岩石和饱和岩石的应力波衰减规律。在应力波传播过程中，其幅值有较大的衰减，干燥岩石的衰减最大，且孔隙度越大衰减越大，饱和岩石还存在较强的波弥散效应。在小于岩石屈服强度时，多次冲击加载下获得随冲击加载次数的增加，加载模量增大，残余应变减小的压实效应。这一结果可用于大型地震工程和防护工程的设计和建造。 |
| 英文摘要: |
| Shock compression SHPB (split Hopkinson pressure bar) tests were carried out for dry, saturated with water and saturated with pumping oil marble and saturated sandstone, respectively, and stress wave attenuation rules of dry and saturated rock were obtained. During the stress wave propagation process, its amplitude attenuation is obvious; the attenuation of dry rock is the largest. The rocks with greater porosity have more obvious attenuation. Saturated rocks have rather intensive wave dispersion effect. When impact loading is smaller than rock yield strength, the results of multi-impact loading show that loading modulus increases and residual strain reduces along with the increase of impact loading number. These results can be used for the design and construction of large-scale earthquake engineering and protection engineering. |
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