| 裂隙岩体动力特性的试验模拟研究 |
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| 引用本文： | 张海波,王媛,王鲁明,张伟. 裂隙岩体动力特性的试验模拟研究[J]. 河海大学学报(自然科学版), 2007, 35(3): 309-311 |
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| 作者姓名： | 张海波 王媛 王鲁明 张伟 |
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| 作者单位： | 河海大学岩土工程研究所,江苏,南京,210098;徐州空军学院机场工程系,江苏,徐州,221000;河海大学岩土工程研究所,江苏,南京,210098;工程兵指挥学院,江苏,徐州,221004;徐州空军学院机场工程系,江苏,徐州,221000 |
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| 基金项目： | 国家自然科学基金资助项目(50579090) |
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| 摘 要： | 针对地震、爆破等动力荷载作用下裂隙岩体的动力学特性问题,采用水泥浆制作试样,模拟具有不同数量平行贯通裂隙的岩体,利用Hopkinson压杆对试样施加应变率为100,140,170的动力荷载,得出试样在高应变率下的动态应力-应变曲线.对应力-应变曲线的分析表明:裂隙岩体具有应变率敏感性;破坏岩体的最终变形随着裂隙率降低而减小.
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| 关 键 词： | 裂隙岩体 动力学特性 Hopkinson压杆 半导体应变片 应变率敏感性 |
| 文章编号： | 1000-1980（2007）03-0309-03 |
| 修稿时间： | 2006-10-13 |
Experimental research on dynamic characteristics of fractured rock mass |
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| ZHANG Hai-bo,WANG Yuan,WANG Lu-ming,ZHANG Wei. Experimental research on dynamic characteristics of fractured rock mass[J]. Journal of Hohai University (Natural Sciences ), 2007, 35(3): 309-311 |
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| Authors: | ZHANG Hai-bo WANG Yuan WANG Lu-ming ZHANG Wei |
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| Affiliation: | 1. Geotechnical Research Institute of Hohai University, Nanjing 210098, China; 2. Airfield Engineering Department, Xuzhou Air Force College, Xuzhou 221000, China; 3. Engineer Command Academy, Xuzhou 221004, China |
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| Abstract: | In view of the dynamic characteristics of fractured rock mass under dynamic loads of earthquake,blasting,dynamic digging,and so on,specimens are made by cement grout to simulate rock mass with different quantities of parallel cross fractures.Then by using the Hopkinson pressure bar,the specimens are loaded at the strain rates of 100,140 and 170 respectively,and the dynamic strain-stress curve of the specimens was obtained at high strain rate.The analysis of the strain-stress curve shows that fractured rock mass is sensitive to strain rate,and the final deformation of destructive rock mass will decrease with the lowering of fracture rate. |
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| Keywords: | fractured rock mass dynamic characteristic Hopkinson pressure bar semiconductor gauge strain rate sensitivity |
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