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    干砂最大剪切模量的共振柱与弯曲元试验

    柏立懂, 项 伟, SAVIDIS A Stavros, RACKWITZ Frank

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    柏立懂, 项 伟, SAVIDIS A Stavros, RACKWITZ Frank. 干砂最大剪切模量的共振柱与弯曲元试验[J]. 岩土工程学报, 2012, 34(1): 184-188.
    引用本文: 柏立懂, 项 伟, SAVIDIS A Stavros, RACKWITZ Frank. 干砂最大剪切模量的共振柱与弯曲元试验[J]. 岩土工程学报, 2012, 34(1): 184-188.
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    BAI Li-dong, XIANG Wei, SAVIDIS A Stavros RACKWITZ Frank, SAVIDIS A Stavros RACKWITZ Frank. Resonant column and bender element tests on maximum shear modulus of dry sand[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1): 184-188.
    Citation: BAI Li-dong, XIANG Wei, SAVIDIS A Stavros RACKWITZ Frank, SAVIDIS A Stavros RACKWITZ Frank. Resonant column and bender element tests on maximum shear modulus of dry sand[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1): 184-188.
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    干砂最大剪切模量的共振柱与弯曲元试验  English Version

    • 1. 中国地质大学武汉 工程学院，湖北 武汉 430074 ； 2. 贵州高速公路开发总公司，贵州 贵阳 550004 ； 3. 柏林工业大学土力学与岩土工程系，德国 柏林 13355

    详细信息
      作者简介:

      柏立懂( 1979 – ) ，男，贵州荔波人，工学博士，主要从事岩土工程应用及研究。

    • 中图分类号: TU 411.8

    Resonant column and bender element tests on maximum shear modulus of dry sand

    • 1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China; 2. Guizhou Expressway Development Corporation, Guiyang 550004, China; 3 . Chair of Soil Mechanics and Geotechnical Engineering, Technical University of Berlin, Berlin 13355, Germany)

    摘要

      摘要
    • 摘要: 对德国 4 种干砂试样进行了共振柱与弯曲元对比试验，旨在分析弯曲元法测定砂土最大剪切模量时存在问题和解决方法。研究表明：时域初达法判定的剪切波传播时间较其他方法具有更好的稳定性；弯曲元试验测定最大剪切模量输入电压脉冲频率的减小而减小，衰减程度因砂土类型而异，该影响随围压的增大而减弱；对比分析表明，弯曲元与共振柱试验测定的最大剪切模量具有良好的线性关系，对柏林砂和不伦瑞克砂，存在一个临界最大剪切模量，小于该临界值时，弯曲元测值大于共振柱测值，而大于该临界值时，前者小于后者，两者差值随土样刚度增大而增大。对比研究指出，弯曲元试验尽可能采用合适高频脉冲电压作为激发电压，实践中应事先与共振柱试验进行对比。
      Abstract: The problems and solutions of applying the bender element method to determine the maximum shear modulus Gmax) of sand are investigated by conducting resonant columnRC) and bender elementBE) tests on four dry sands obtained from Germany. The study indicates that the start-to-start method is more reliable to identify the time of shear wave propagation in specimens compared to other methods. In BE tests, the excitation frequency of input waves has influence on the tested Gmax, and this influence is dependent on soil types and reduced by increasing confining pressure. A comparison between RC and BE tests shows that Gmax by both methods may be well expressed as a linear equation; for the Berlin sand and Braunschweig coarse sand, there exists a threshold Gmax below which Gmax by BE tests GmaxBE)) is greater than that by RC tests GmaxRC)), however beyond which the GmaxBE) is smaller than GmaxRC) and the distance between both increases with increasing stiffness soil. In practice, it is suggested that the input voltage with proper high frequency is preferred for BE tests, as compared with RC tests.
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      • 参考文献(18)
    • [1] ASTM. D4015-92 Standard test methods for modulus and damping of soils by the resonant-column method[S]. Philadelphia: American Society for Testing and Materials, 2000.
      [2] SHIRLEY D J, HAMPTON L D. Shear-wave measurements in laboratory sediments[J] . The Journal of the Acoustical Society of America, 1978, 63 (2): 607 – 613
      [3] LEONG E C, YEO S H, RAHARDJO H. Measuring shear wave velocity using bender elements[J] . Geotechnical Testing Journal, 2005, 28 (5): 488 – 498.
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      [5] OGINO T, MITACHI T, CHAN K H, OIKAWA H, et al. A method for received waveform reconstruction based on bender element test using frequency-swept signal[J] . Soils and Foundations, 2008, 48 (2): 287 – 295.
      [6] YOUN J U, CHOO Y W, KIM D S. Measurement of small-strain shear modulus <>Gmax of dry and saturated sands by bender element, resonant column, and torsional shear tests[J] . Canadian Geotechnical Journal, 2008, 45 (10): 1426 – 1438.
      [7] FONSECA A V, FERREIRA C, FAHEY M. A framework interpreting bender element tests, combining time-domain and frequency-domain methods[J] . Geotechnical Testing Journal, 2009, 32 (2): 91 – 107.
      [8] 陈云敏 , 周燕国 , 黄 博 . 利用弯曲元测试砂土剪切模量的国际平行试验 [J] . 岩土工程学报 , 2006, 28 (7): 874 – 880. (CHEN Yun-min , ZHOU Yan-guo, HUANG Bo . International parallel test on the measurement of shear modulus of sand using bender elements [J]. Chinese Journal of Geotechnical Engineering, 2006, 28 (7): 874 – 880. (in Chinese))
      [9] 姬美秀 , 陈云敏 , 黄 博 . 弯曲元试验高精度测试土样剪切波速方法 [J] . 岩土工程学报 , 2003, 25 (6): 732 – 736. ( JI Mei-xiu , CHEN Yun-min , HUANG Bo . Method for precisely determining shear wave velocity of soil from bender element tests [J] . Chinese Journal of Geotechnical Engineering, 2003, 25 (6): 732 – 736. (in Chinese))
      [10] YAMASHITA S, FUJIWARA T, KAWAGUCHI T, et al. Interpretation of international parallel test on the measurement of Gmax using bender elements[J] . Soils and Foundations, 2009, 49 (4): 631 – 650.
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      [13] BROCANELLI D, RINALDI V. Measurement of low-strain material damping and wave velocity with bender elements in the frequency domain[J] . Canadian Geotechnical Journal, 1998, 35 (6): 1032 – 1040.
      [14] BLEWETT J, BLEWETT I J, WOODWARD P K. Measurement of shear-wave velocity using phase-sensitive detection techniques[J] . Canadian Geotechnical Journal, 1999, 36 (5): 934 – 939.
      [15] GREENING P D, NASH D F T. Frequency domain determination of <>G(0) using bender elements[J] . Geotechnical Testing Journal, 2004, 27 (3): 288 – 294.
      [16] DYVIK R, MADSHUS C. Laboratory measurements of Gmax using bender elements[C]// Advances in the Art of Testing Soils under Cyclic Conditions. Detroit, 1985: 186 – 196.
      [17] SOUTO A, HARTIKAINEN J, OZUDOGRU K. Measurement of dynamic parameters of road pavement materials by the bender element and resonant column tests[J] . Géotechnique, 1994, 44 (3): 519-526.
      [18] BAI L D. Preloading effects on dynamic sand behavior by resonant column tests[D]. Berlin: Technical University Berlin, 2011.
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    出版历程
    • 收稿日期:  2010-11-17
    • 发布日期:  2012-01-19

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      SAVIDIS A Stavros RACKWITZ Frank

      • 1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China; 2. Guizhou Expressway Development Corporation, Guiyang 550004, China; 3 . Chair of Soil Mechanics and Geotechnical Engineering, Technical University of Berlin, Berlin 13355, Germany)

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