Journal of Shanghai Jiao Tong University ›› 2016, Vol. 50 ›› Issue (03): 364-369.

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Analysis of Load Capacity Behaviors of Steel Fiber Reinforced Concrete Piles Through Model Tests

OUYANG Fang1,ZHANG Jianjing1,DENG Xiaoning2,HAN Jianwei1,BI Junwei1,DU Lin1   

  1. (1. Civil Engineering Institute, Southwest Jiaotong University, Chengdu 610031, China; 2. Zhengzhou Nuclear Geotechnical Engineering Co. Ltd., China Nuclear Engineering Group Co., Zhengzhou 450002, China)
  • Received:2015-05-22 Online:2016-03-28 Published:2016-03-28

Abstract: Abstract: Static load tests of concrete piles of different diameters with and without steel fiber were conducted to study the bearing capacity, the characteristics of strain, and the damage phenomenon of steel fiber reinforced concrete piles under vertical loads. Strain gauges were arranged along the longitudinal direction of the piles in order to measure the strain. Besides, a comparative analysis of the damage features between the steel fiber reinforced concrete pile and the concrete pile was conducted with the excavated piles after the completion of the tests. It is found that the compression deformation of the concrete pile can be effectively decreased with the steel fiber. The steel fiber reinforced concrete pile of the diameter equal to 7.0 cm has less compression and larger ultimate bearing capacity compared to that of the pile with the diameter equal to 4.5 cm. However, the compression and the ultimate bearing capacity vary little when the diameter of the piles changes from 7.0 cm to 8.0 cm. Moreover, the cracks or damage appear at the bottom or top of these piles, and the crack resistance of the concrete pile is improved with the steel fiber. Based on the results, some suggestions were proposed for the design of the steel fiber reinforced concrete pile.

Key words: Key words: steel fiber reinforced concrete pile, bearing capacity, strain, damage phenomenon

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