Journal of South China University of Technology (Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (4): 146-152.doi: 10.3969/j.issn.1000-565X.2018.04.020

• Architecture & Civil Engineering • Previous Articles    

Effects of Ｒoughness on Cyclic Shear Behavior of Ｒed Clay-Concrete Interface
 

 CHENG Hao1， 2 WANG Xuan1， 2 ZHANG Jiasheng1， 2 WANG Qiyun3    

  1.   1． School of Civil Engineering，Central South University，Changsha 410075，Hunana，China; 2． National Engineering Laboratory for High-Speed Ｒailway Construction，Changsha 410075，Hunan，China; 3． College of Civil Engineering，Fujian University of Technology，Fuzhou 350108，Fujian，China
  • Received:2017-06-29 Revised:2018-01-11 Online:2018-04-25 Published:2018-03-01
  • Contact: 王晅( 1977) ， 男，博士，讲师，主要从事高速铁路路基动力学与岩土工程方面的研究． E-mail:dddebug@csu.edu.cn
  • About author:成浩( 1990-) ，男，博士生，主要从事土与结构的相互作用研究
  • Supported by:
     Supported by the National Natural Science Foundation of China( 51508097) and the Natural Science Foundation of Hunan Province( 2017JJ2314) 

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Abstract:

In order to investigate the influence of surface roughness of structure on cyclic shear behavior of soilstructure interface，a series of large scale cyclic direct shear tests were performed for red clay-concrete interface．
The effect of roughness of concrete surface and normal stress were investigated on cyclic shear behavior of clay-con
crete interface． The results indicate that the phenomena of cyclic shear softening is significant on red clay-concrete interface due to cyclic loading，and that the shear strength of interface increases with the roughness being incremented; An obvious contraction of interface was observed during the process of cyclic shear under different conditions，
and the maximum value of contraction increases with the increment of roughness． Shear stiffness and damping ratio
of interface decrease with rising number of cycles and tend to a steady value at the end of cyclic tests． The increase of roughness can improve shear stiffness of interface，but produces little influence on damping ratio of interface． 

Key words: interface, roughness, cyclic shear, shear stiffness, damping ratio, concrete, red clay 

CLC Number: