岩石直接拉伸与压缩变形的试验研究

›› 2008, Vol. 29 ›› Issue (1): 18-22.

岩石直接拉伸与压缩变形的试验研究

余贤斌¹，王青蓉²，李心一¹，谢强³，纳裕康⁴，宋战平⁵

1.昆明理工大学国土资源工程学院，昆明650093；2.昆明理工大学交通工程学院，昆明650093；3.重庆大学土木工程学院，重庆 400045； 4.昆明理工大学机械工程学院，昆明650093；5.西安建筑科技大学土木工程学院，西安710055

收稿日期:2006-11-15 出版日期:2008-01-10 发布日期:2013-07-18
作者简介:余贤斌，男，1953年生，教授，博士，主要从事岩土力学与工程方面的科研和教学工作。
基金资助:
云南省自然科学基金课题（No. 96E033M）

Experimental research on deformation of rocks in direct tension and compression

YU Xian-bin¹, WANG Qing-rong², LI Xin-yi¹, XIE Qiang³, NA Yu-kang⁴, SONG Zhan-ping⁵

1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Faculty of Traffic Engineering, Kunming University of Science and Technology, Kunming 650093, China; 3. College of Civil Engineering, Chongqing University, Chongqing 400045,China; 4. Faculty of Mechanical Engineering, Kunming University of Science and Technology, Kunming 650093, China; 5. School of Civil Engineering，Xi’an University of Architecture and Technology, Xi’an 710055, China

Received:2006-11-15 Online:2008-01-10 Published:2013-07-18

摘要/Abstract

摘要： 采用自行研制的可对同一岩石试样进行单轴压缩和直接拉伸的试验装置，对3种岩石进行了压缩和直接拉伸试验。结果表明，这3种岩石的压缩弹性模量均大于拉伸弹性模量，压缩与拉伸弹性模量之比分别为1.1，1.4，2.5。压缩泊松比也大于拉伸泊松比。研究表明：直接拉伸下切线泊松比随荷载的增加而减小，与压缩下泊松比的变化相反。

关键词: 岩石, 直接拉伸, 压缩, 弹性模量, 泊松比

Abstract: Laboratory tests of direct tension and compression were conducted for three rock types with a testing unit that can perform both compression and direct tension on a same rock sample. The results showed that for most rock samples, the obtained Young’s moduli in compression EC were greater than those in tension ET. For Gaofeng limestone, the EC/ET ratio was 1.1; for Gaofeng pyrite, the ratio was 1.4; and for Songshujiao marble, the ratio was 2.5. The average values of Poisson’s ratios in compression were also greater than the values in tension. It was also found that the tangent Poisson’s ratios in tension decreased with the increasing applied loading, which was opposite to the behavior in compression.

Key words: rock, direct tension, compression, Young’s modulus, Poisson’s ratio

中图分类号:

TU 452

余贤斌，王青蓉，李心一，谢强，纳裕康，宋战平 . 岩石直接拉伸与压缩变形的试验研究[J]. , 2008, 29(1): 18-22.

YU Xian-bin , WANG Qing-rong , LI Xin-yi , XIE Qiang , NA Yu-kang , SONG Zhan-ping . Experimental research on deformation of rocks in direct tension and compression[J]. , 2008, 29(1): 18-22.

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