| 压实粘性土动态力学性能的SHPB试验 |
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| 引用本文： | 刘俊新,陈忠富,徐伟芳,何鹏.压实粘性土动态力学性能的SHPB试验[J].西南交通大学学报,2011,46(6):960-965. |
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| 作者姓名： | 刘俊新 陈忠富 徐伟芳 何鹏 |
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| 作者单位： | 1. 中国工程物理研究院总体工程研究所,四川绵阳621900;西南科技大学土木工程与建筑学院,四川绵阳621010
2. 中国工程物理研究院总体工程研究所,四川绵阳,621900 |
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| 基金项目： | 国家973计划资助项目(2010CB832700) |
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| 摘 要： | 为解决因土体波阻抗及波速较低且变形较大,采用传统的分离式Hopkinson压杆(SHPB)实验装置不能准确获得土体的动态应力-应变曲线的问题,采用直径25 mm的聚碳酸脂SHPB实验装置和真空封泥小球丸作为波形整形器,以不同的轴向速度撞击试件,测试试件在应变率600 ～2 500 s-1之间的动态力学性能,并通过应力平衡和常应变率分析对试验结果的有效性进行了讨论.结果表明:用聚碳酸脂SHPB装置对压实粘性土进行动态试验是可行的；土体的动态应力与应变具有显著的应变率效应,动态应力与应变率成指数关系.
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| 关 键 词： | 聚碳酸脂 压实粘性土 波形整形技术 高应变率 动态力学性能 |
SHPB Experiment of Dynamic Mechanical Behavior of Compacted Clay |
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| LIU Junxin
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CHEN Zhongfu
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XU Weifang
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HE Peng.SHPB Experiment of Dynamic Mechanical Behavior of Compacted Clay[J].Journal of Southwest Jiaotong University,2011,46(6):960-965. |
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| Authors: | LIU Junxin CHEN Zhongfu XU Weifang HE Peng |
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| Institution: | LIU Junxin 1,2,CHEN Zhongfu 1,XU Weifang 1,HE Peng 1(1.Institute of Systems of Engineering,China Academy of Engineering Physics,Mianyang 621900,China,2.School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China) |
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| Abstract: | Because of soils' low wave velocity and impedance and large deformation,it is unable to obtain their reliable and accurate dynamic stress-strain curves with a conventional SHPB(split Hopkinson pressure bar) experimental device.To investigate the compressive mechanic properties of compacted clays under strain rates varying from 600 to 2 500 s-1,compacted clay specimens were subjected to axial impact with different projectile speeds by using the improved SHPB with a diameter of 25 mm made of polycarbonate and... |
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| Keywords: | polycarbonate compacted clay pulse shaping technique high strain rate dynamic mechanical properties |
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