中国铁道科学2017，Vol.38Issue(4)：47-54,8.DOI:10.3969/j.issn.1001-4632.2017.04.07
粘钢加固RC梁非线性分析方法
Nonlinear Analysis Method for RC Beam Strengthened with Bonded Steel
摘要
Abstract
Based on the existing constitutive relation of concrete,the constitutive relation of steel as well as the bond-slip constitutive relationship between steel plate and reinforced concrete (RC) beam,the secant stiffness was introduced.According to the equilibrium condition of the RC beam section strengthened with bonded steel and the deformation coordination condition between steel plate and RC beam,the nonlinear differential equation of RC beam strengthened with bonded expressed by the tension of steel plate was derived.Through introducing displacement boundary condition and continuity condition,the general solution to the differential equation of RC simply supported beam strengthened with bonded steel under double concentrated loads and uniform load was respectively given,and the expression for the coordinative coefficient of RC beam strengthened with bonded steel was given in terms of the tension of steel plate.Comparing the calculated results with the experimental results of 5 different kinds of tested beams with different quantities of bonded steel,concrete strength grades and spans,results show that the two are in good agreement.The main factors affecting the accuracy of the nonlinear analysis method are bond slip stiffness,end anchorage condition of steel plate and loading forms.关键词
钢筋混凝土梁/承载力/变形/桥梁加固/粘钢/非线性分析/粘结—滑移Key words
Reinforce concrete beam/Bearing capacity/Deformation/Bridge reinforcement/Bonded steel/Nonlinear analysis/Bond-slip分类
交通工程引用本文复制引用
刘廷滨,赵建昌,张家玮,王作伟..粘钢加固RC梁非线性分析方法[J].中国铁道科学,2017,38(4):47-54,8.基金项目
国家自然科学基金资助项目(51368035) （51368035）
长江学者和创新团队发展计划滚动资助项目(IRT_15R29) （IRT_15R29）
