• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 57 Issue 6
Dec.  2022
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Journal of Southwest Jiaotong University  > 2022  >  57(6): 1193-1200.
PAN Yi, WANG Zhongkai, QU Zhe, ZHAO Chongjin. Seismic Performance of Owner-Built RC Frame Structures in Nepal[J]. Journal of Southwest Jiaotong University, 2019, 54(2): 304-312. doi: 10.3969/j.issn.0258-2724.20170755
Citation: FENG Jun, LAI Bing, ZHANG Shengliang, WANG Duo, LIU Yuan. Laboratory Pull-Out Test Study of Basalt Fiber Reinforced Polymer Bolt for Strengthening Mixed Soil[J]. Journal of Southwest Jiaotong University, 2022, 57(6): 1193-1200. doi: 10.3969/j.issn.0258-2724.20200874
shu

Laboratory Pull-Out Test Study of Basalt Fiber Reinforced Polymer Bolt for Strengthening Mixed Soil

doi: 10.3969/j.issn.0258-2724.20200874

  • School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

  • Received Date: 12 Jan 2021
  • Rev Recd Date: 18 May 2021
    • Available Online: 18 Jul 2022
  • Publish Date: 20 May 2021
    Abstract

  • Basalt fiber reinforced polymer (BFRP) has the advantages of light weight, high strength and good durability. Using the material as anchor can effectively solve the corrosion problem of traditional steel bar anchor and has a broad application prospect in engineering construction in harsh environment. Taking the collapse alluvial mixed soil which widely exists in the southwest mountainous area as the object, through the indoor pull-out test, the effects of anchor type, anchor diameter, anchorage length and grouting diameter on the ultimate pullout load and interface shear stress are studied. The failure mode and stress distribution law of the anchoring system are analyzed. The results show that the failure mode of BFRP anchor in mixed soil is shear failure along the interface between grouting body and soil, and the pull-out bearing capacity of BFRP anchor is basically the same as that of reinforced anchor, so BFRP anchor can be used to replace reinforced anchor directly in practical engineering. The pullout load-displacement curve of BFRP anchor is in the form of three stages, and the elastic critical load is 20%−28% of the ultimate load. Under the test condition, the ultimate bearing capacity of the bolt is proportional to the anchoring length and the diameter of the grout. And the circumferential crack in the grouting body makes the axial stress of the bolt in the form of a single peak and reduces the stress concentration in the front of the anchoring section. The larger the diameter of the grouting body in the mixed soil is, the lower the interface strength is, the diameter increases from 90 mm to 110 mm, and the interface strength decreases by about 8%.

     

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