吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (6): 1791-1797.doi: 10.13229/j.cnki.jdxbgxb201506009

• • 上一篇    下一篇

粘土的动力特性试验

赵玉1, 李衍赫2, 张培3, 赵科3, 刘伟超1   

  1. 1.石家庄铁道大学 土木工程学院,石家庄 050043;
    2.浙江大学 建筑工程学院,杭州 310058;
    3.石家庄学院 经济管理学院,石家庄 050035
  • 收稿日期:2014-12-04 出版日期:2015-11-01 发布日期:2015-11-01
  • 通讯作者: 张培(1983-),女,讲师,博士.研究方向:土的工程特性,土体本构,数值计算.E-mail:zhangpeiwutong@163.com
  • 作者简介:赵玉(1979-),男,副教授.研究方向:土的工程特性,土体本构,土动力学,土工合成材料.E-mail:zhaoyu790113@163.com
  • 基金资助:
    国家自然科学基金项目(51309153)

Experimental study of the dynamic characteristics of clay

ZHAO Yu1, LI Yan-he2, ZHANG Pei3, ZHAO Ke3, LIU Wei-chao1   

  1. 1.School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043, China;
    2.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
    3.School of Economics and Management, Shijiazhuang University,Shijiazhuang 050035, China
  • Received:2014-12-04 Online:2015-11-01 Published:2015-11-01

摘要: 通过GDS动三轴试验,以某实际工程场地粘土为研究对象,研究了粘土的动模量和阻尼比特性。研究结果表明,1/Edd关系曲线可近似用直线方程来描述,固结围压与振动频率对阻尼比的影响较小,而随固结比的增大,阻尼比曲线呈现跳跃式变化。通过对各试验参数建立一定精度范围内的经验公式,发现(Edmax/Pa·kc)-(σm/Pa)关系曲线进行归一化处理后可采用直线方程来描述,(λddmax)与(1-Gd/Gdmax)关系曲线进行归一化处理后可用幂函数来描述,其归一化方程使用方便,可为实际工程应用提供参考。

关键词: 土木工程, 粘土, 滞回圈, 动三轴, 动弹模量, 动剪模量比, 阻尼比

Abstract: The clay collected from an engineering site is studied with GDS cyclic triaxial test to analyze the characteristics of dynamic modulus and damping ratio. It is shown that the 1/Edd curve can be described by the approximate linear equation and the confining pressure and vibration frequency have little influence on the damping ratio. However, the change of damping ratio curve is saltatory with the increase in consolidation ratio. Through the establishment of empirical formula of the test parameters in a certain precision range, the (Edmax/Pa·kc)-(σm/Pa) curve could be expressed by linear equations after normalization processing, the curve (λddmax) and (1-Gd/Gdmax) could be expressed by the power function after normalization processing. These functions can be easily used and provide reference for practical engineering.

Key words: civial engineering, clay, hysteresis loop, dynamic triaxial test, dynamic elastic modulus, dynamic shear modulus ratio, damping ratio

中图分类号: 

  • TU411
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