CFRP板加固受弯钢梁的承载力及挠度分析

采用截面等效代换法,对碳纤维板加固受弯钢梁进行了承载力及挠度分析,推导出CFRP板加固受弯钢梁的理论计算公式。为验证公式,进行了5根CFRP板加固钢梁的单调静力试验,并用有限元软件进行模拟分析,将计算结果分别与试验结果和有限元分析结果进行比较后发现：弯矩理论计算值比试验值略小,挠度理论计算值比试验值略大,且都与有限元模拟值相近,说明理论计算安全,计算方法具有良好的适用性。

Bearing Capacity and Deflection Analysis of Bending Steel Beams Strengthened with CFRP Plates

The method of using one section to exchange another is used to study bearing capacity and deflection analysis of bending steel beams strengthened with carbon fiber-reinforced polymer（CFRP） plates.The theoretical formula of bending steel reinforced beams is worked out.Five reinforced beams are used in the monotonic static experiment for validating the formula.Finite element software is applied to simulate and analyze the strengthened beams.The calculation result is compared with the experiment and finite element simulation results and analyzed.The calculated value is less than experimental value of bending moment while the calculated value is bigger than experimental value of deflection.Both calculated values are approaching to the simulation results.It shows that the calculating is safe and the calculating method has good applicability.The formula can be used as reference in the project of designing steel beams reinforced by CFRP plates.