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 (長(zhǎng)沙理工大學(xué)橋梁工程安全控制省部共建教育部重點(diǎn)實(shí)驗(yàn)室， 長(zhǎng)沙 410004)

［摘要］以配斜筋銹蝕RC梁的剪壓破壞為研究對(duì)象，基于轉(zhuǎn)角軟化桁架理論，視RC梁截面的剪力由剪壓區(qū)的混凝土、箍筋和斜筋共同承擔(dān)，考慮斜筋及銹蝕對(duì)梁抗剪承載力的影響，通過(guò)應(yīng)力平衡方程、變形協(xié)調(diào)方程、材料的應(yīng)力-應(yīng)變方程并引進(jìn)鋼筋銹蝕修正系數(shù)，建立了配斜筋銹蝕RC梁的抗剪承載力公式。并將14根配斜筋銹蝕RC梁的理論計(jì)算值與試驗(yàn)值進(jìn)行驗(yàn)證對(duì)比，結(jié)果表明理論計(jì)算值與試驗(yàn)值吻合較好，驗(yàn)證了該計(jì)算方法的有效性。

［關(guān)鍵詞］橋梁工程; 轉(zhuǎn)角軟化桁架理論; 斜筋; 銹蝕; RC梁; 抗剪承載力

中圖分類(lèi)號(hào)：TU375       文獻(xiàn)標(biāo)識(shí)碼：A       文章編號(hào)：1002-848X(2014)11-0077-06

Shear capacity calculation of corroded RC beams with diagonal reinforcement based on rotating angle softened truss theory

Wang Lei, He Bingtao, Zhang Xuhui, Zhang Jianren

 (Key Laboratory of Bridge Engineering of Ministry of Education, Changsha University of Science and Technology, Changsha 410004, China)

Abstracts: Based on the rotating angle softened truss theory, the shear capacity of the corroded RC beams with diagonal reinforcement was taken as the study object. The shear capacity of RC beams was born by the concrete, stirrup and diagonal reinforcement in the shear-compression region. Considering the influence of the diagonal reinforcement and corrosion on the beam shear capacity, shear capacity formula of RC beams was established through the stress balance equation, deformation coordination equation, stress-strain equation of the RC beam as well as importing modified coefficient of reinforcement corrosion. Experimental values of fourteen corroded RC beams with diagonal reinforcement were compared with theoretical values and the results matched well, which validated the effectiveness of the method.

Keywords: bridge engineering; rotating angle softened truss theory; diagonal reinforcement; corrosion; reinforced concrete beam; shear capacity

*國(guó)家自然科學(xué)基金（50878031）。

作者簡(jiǎn)介：王磊，博士，教授，Email:leiwlei@hotmail.com。

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