外文翻譯---芳綸纖維筋混凝土梁的抗彎效應(yīng)之?dāng)?shù)值研究-其他專(zhuān)業(yè)(參考版)
2025-01-23 09:43本頁(yè)面
【正文】 however, the prestress level was a more dominant factor at service state. The present provision of concerning the im provement of deformability ., reduce a prestress level in FRP tendons should be revised to include the critical deflec tion consideration. The research suggests that the prestress level for AFRP tendons be limited as low as 40% ultimate to satisfy the ACI318 deflection requirement. The approach showed consistent deformability indices irrespective of the sectional properties, whereas the CHBDC approach was significantly affected by the properties. The CHBDC approach may not be remended for a beam with high Ig / Icr ratios such as 77. A limit of the deformability index for the approach was suggested to be . More experimental evaluation may be remended to con firm the present findings. （ From： ） 。 Lees 2021 , there is still a dearth of understanding of the flexure of FRPprestressed beams. For ex ample, the flexural response of such beams is dependent upon the level of prestress in FRP tendons and sectional properties. The upper limit of FRP tendons for prestressing is well lower than that of steel tendons primarily due to the stressrupture phenomenon of FRP posites American Concrete Institute ACI 2021 . The prestress level in FRP tendons may, thus, vary casebycase。 Yang et al. 2021 . Concrete members prestressed with steel tendons may suffer from corrosion damage, including spalling of concrete and inadequate loadcarrying ca pacity due to reduced steel area, and may require consistent main tenance expenses. The use of noncorrosive FRP tendons can overe such problems. Typically, two types of FRP tendons are available in practice, namely, aramid FRP AFRP and carbon FRP CFRP . Glass FRP may not be remended for prestressed concrete applications because of strength degradation under alka line environments and creep rupture under sustained loads Dolan 1999。 Kim and Heffernan 2021 . The posite materials may be used for pre stressed concrete structures in lieu of conventional steel tendonsAbdel Aziz et al. 2021。 （譯文來(lái)源： ） Flexural Response of Concrete Beams Prestressed with AFRP Tendons: Numerical Investigation This paper presents the flexure of concrete beams prestressed with aramid fiberreinforced polymer AFRP tendons. Threedimensional nonlinear finiteelement analysis and iterative sectional analysis are conducted to predict the behavior of AFRPprestressed m
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