(长沙理工大学桥梁工程安全控制省部共建教育部重点实验室， 长沙 410004)

［摘要］以配斜筋锈蚀RC梁的剪压破坏为研究对象，基于转角软化桁架理论，视RC梁截面的剪力由剪压区的混凝土、箍筋和斜筋共同承担，考虑斜筋及锈蚀对梁抗剪承载力的影响，通过应力平衡方程、变形协调方程、材料的应力-应变方程并引进钢筋锈蚀修正系数，建立了配斜筋锈蚀RC梁的抗剪承载力公式。并将14根配斜筋锈蚀RC梁的理论计算值与试验值进行验证对比，结果表明理论计算值与试验值吻合较好，验证了该计算方法的有效性。

［关键词］桥梁工程; 转角软化桁架理论; 斜筋; 锈蚀; RC梁; 抗剪承载力

中图分类号：TU375       文献标识码：A       文章编号：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

*国家自然科学基金（50878031）。

作者简介：王磊，博士，教授，Email:leiwlei@hotmail.com。

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