碳纤维布加固RC梁后的荷载-挠度全曲线的简化计算

摘要

为了得到碳纤维布加固RC梁后的荷载-挠度全曲线,许多文献的分析过程都需要借助计算机程序进行迭代计算,以确定每一个时段的中和轴高度,由此可得到相应的荷载-挠度关系.为了能在实际的工程设计中进行简化计算,本文通过求出各个界限荷载值以及与之对应的位移,利用各个界限点之间线性插值来得到荷载-挠度全曲线关系.给出了钢筋混凝土结构的分阶段平截面弹塑性分析法.计算结果与试验结果、有限元分析结果吻合良好,表明了该方法具有较高的精度,为碳纤维布加固梁提供了参考依据.%In order to obtain the entire load-deflection curve of reinforced concrete beams strengthened with carbon fiber sheet, the analysis processes of many references need the iterative computation with the computer program, which determined the neutral axis altitude of each time interval, the corresponding load-deflection relations will be obtained. In order to carry on the simplification computation in the actual engineering design,each boundary load value as well as with its correspondence displacement were extracted, the entire load-deflection curve was obtained by using the linear interpolation of each point. The horizontal section elastic — plastic analytic method of reinforced concrete structure for every stage is provided. The computing result showed great coincidence with the test result and the finite element analysis result,which indicated that this method has the high precision, which provide the reference for reinforced concrete beams strengthened with carbon fiber sheet.