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- W2387850829 abstract "The bearing capacity and durability decline in structure caused by the corrosion of prestressed tendon could be effectively avoided with CFRP(Carbon Fiber Reinforced Polymer) tendon as prestressing tendon instead of high strength steel bar and with ordinary reinforcement as non-prestressing tendon.To solve the problem of CFRP tendon anchorage,two semicircle steel tubes with definite length were placed between CFRP tendon and XM clip anchorage.The gap between tube and CFRP tendon were filled with epoxy resin,so the grip force were evenly distributed in relatively long zone.According to different integrated tendon index,four unbonded partially prestressed simply supported concrete beams,with CFRP tendon as the unbonded prestressing tendon and the ordinary reinforcement as non-prestressing tendon,were designed and tested.Tests show that the average distance of the tested beam cracks is only related with the diameter of non-prestressing tendon,effective tendon ratio and the thickness of concrete protection layer.It is irrelated with unbonded prestressing CFRP tendon.The conversion coefficient is adopted as 0.35 according to drawing stress increment in CFRP tendon analogy with non-prestressing tendon,and uneven coefficient of cracks distribution is 1.31.The formula for calculating crack width and stiffness was put forward,and the calculation results agree well with test results.The change rule is obtained,in which the increment of the ultimate stress in unbonded CFRP tendon decreases linearly with the increase of integrated tendon index.And then,the formula is presented based on force equilibrium for calculating the bearing capacity of the normal section for this kind of beam." @default.
- W2387850829 created "2016-06-24" @default.
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- W2387850829 date "2008-01-01" @default.
- W2387850829 modified "2023-09-25" @default.
- W2387850829 title "Test and Research of Simply Supported Beam Partially Prestressed with Unbonded CFRP Tendon" @default.
- W2387850829 hasPublicationYear "2008" @default.
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