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《Fiber Reinforced Plastics/Composites》 2010-01
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FIELD CONTRAST TEST STUDY ON ANCHORING MECHANISM OF GFRP ANCHOR ROD WITH DIFFERENT DIAMETERS

HUANG Zhi-huai 1,2,3,LI Guo-wei 2,3,LI Yu-qi1(1.Pearl River Hydraulic Research Institute,Guangzhou 510611,China;2.Geotechnical Research Institute,Hohai University,Nanjing 210098,China;3.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China)  
Rock bolting is a support widely used in slope engineering,tunnel and large cave support,as well as reinforcement of building structure.As the main part of support structure,the bolt must have enough reliability and durability.However,it is easily eroded by the environment for steel,so the durability of steel bolt being used commonly should be paid more attention to.The glass fiber reinforced plastics(GFRP) bolt is a new kind reinforcement material which is compounded with resin and glass fiber,having better mechanical property and corrosion resistance.The durability problem of slope engineering can be solved if GFRP bolt take the place of steel bars.The tensile test studies the failure characteristic and anchoring mechanism of GFRP anchor rod with different diameters of φ16 and φ32,under the same lithologic characters and three different weathered conditions of adjoining rock: complete,modest and slightly.The result indicates as follows:The GFRP anchor rods with different diameters finally fail in the way of brittle split failure.The ultimate bearing capacity of GFRP anchor rod increases with its diameter.The stress transmission depth of φ16 is affected less by weathered degree of adjoining rock,while the one of φ32 is affected greatly by weathered degree.The stress transmission depth of GFRP anchor rod increases with the weathering degree of adjoining rock.The bond strength between the GFRP anchor rod and the surface of mortar decreases as the diameter increases.
【Fund】: 广东省交通科技项目(2004-17)
【CateGory Index】: TU476
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