Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (7): 116-121.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Improvement of LocalMechanical Properties of Concrete Segment by Stee-l Fiber Reinforcement

Mo Hai-hong  Chen Jun-sheng  Liang Song  Yang Yi-bo  Su Yi   

  1. School of Arch itecture and Civil Eng ineer ing, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China
  • Received:2006-09-06 Online:2007-07-25 Published:2007-07-25
  • Contact: 莫海鸿(1955-), 男, 教授, 博士生导师, 主要从事岩土工程和地下结构的研究. E-mail:cvhhmo@ scut.edu.cn
  • About author:莫海鸿(1955-), 男, 教授, 博士生导师, 主要从事岩土工程和地下结构的研究.

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Abstract:

In order to revea l the effect of steel-fiber reinforcement on the local mechan ica l properties of concrete segmen ts used in sh ield tunne ls, a general 3D finite element code, ADINA, was used to numerica lly analyze the cracking loads, stress distributions and crack distributions of the steel fiber-re inforced concrete ( SFRC ) segment under the jacking force or in a regular service stage. The results indicate that the addition of steel fibers can effec- tively improve the local mechanical properties of segment surface, hand holes and bolt holes, greatly enhance the anti-crack performance of SFRC segment, and make the first-crack load 13. 3% ~ 22. 7% greater than that of the origina l reinforced concrete segm en.t

Key words: steel fiber, concre te, shie ld tunne, segment, mechanical property