外文翻譯---預(yù)應(yīng)力碳纖維布加固鋼筋混凝土梁抗彎性能研究(文件)
【正文】 ment of inertia of the members at the stage of longitudinal steel strands pretension； generated by prestressed CFRP sheets Under CFRP sheets prestress, the moment of inertia of prestressed concrete members should take the converted second moment of area at the strengthening stage. The displacement is calculated according to the following formula: cfecfcrM xMe d sB? ? ? （ 5） In which M cfe ——bending moment caused by CFRP sheets existing pretension at any section x； 3. Analysis of rigidity Rigidity B0 and B cr are decided by 0 I I cr . The paper is to derive the calculation method of prestressed CFRP strengthening concrete box girders’section I0 and I cr under the premise that the depth of the tensile area is covered by the web (as shown in ). According to Reference [5], the members work with cracks. At the tensile area the concrete fails and transforms the tension on it to the longitudinal reinforcement which at this stage does not yield and the pressive stress of the concrete takes the shape of triangle. With the CFRP sheets, the sectional area of the steel bar and CFRP sheets should be converted into the concrete sectional area which is located at the gravity center of the steel bar and the CFRP sheets separately. 5 Calculation of Icr The moment of inertia I cr of the converted section of cracking section for central axis is: . Calculation of 0I 0I i s calculated by the section posed of the cross section area of the concrete and the converted area of plain reinforced bars, prestressed steel strands and prestressed CFRP sheets. In which, X—the depth of pression x can be calculated by the static balancing of the tensile area, the pression area and the neutral axis. b—the width of the web of the ISection hthe depth of the web of the ISection 33 221)2 2 21)( 0 ) ( ( )( ) ( ( ) ( )1139。 theoretic formulas。 翻譯材料 題目： 預(yù)應(yīng)力碳纖維布加固鋼筋混凝土梁抗彎性能研究 出處： Web Mining and Webbased Application, 2020. WMWA 39。 deflection。 ( 39。3339。 39。( ) ( 1) ( )222( 1) 39。 Building Press， 2020. [2] Li Liankun, “Structural Mechanics,” Beijing： HigherEducation Press， 1996 [3] Chinese Standards of Ministry of Communication, “Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and CulvertsJTJ0622020,” Beijing：China Communications Press， 2020 [4] Chinese National Standards, “Concrete Structure Design Specification GB500102020,” Beijing,People39。結(jié)果表明，由于預(yù)應(yīng)力碳纖維布比較細(xì)小，通常對(duì)結(jié)構(gòu)部分只會(huì)產(chǎn)生小的慣性矩作用，因此采用預(yù)應(yīng)力碳纖維布進(jìn)行加固不會(huì)明顯地引起改變?cè)Y(jié)構(gòu)變形的改變。 2 撓度計(jì)算 計(jì)算原則 當(dāng)采用碳纖維布對(duì)混凝土梁進(jìn)行加固時(shí)，混凝土預(yù)應(yīng)力板梁的組成部分通常會(huì)受到荷載的作用；鋼筋在受到拉應(yīng) 變作用的同時(shí) ,受拉
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