碳纤维加固T梁的非线性全过程分析

Nonlinear analysis of whole deformation process of RC T-beam strengthened with carbon fibers

利用碳纤维加固混凝土构件提高承载能力及延长寿命是目前比较流行的方法。为了对碳纤维加固的公路常见钢筋混凝土T梁进行受力全过程分析,按理想界限破坏条件计算了碳纤维加固用量;采用有限元分析软件ANSYS对碳纤维加固钢筋混凝土T梁按卸载和不卸载两种情况进行了建模、计算和分析。重点考虑了不同配筋率、不同粘贴碳纤维层数的影响,并与试验结果进行比较。分析结果表明有限元非线性分析方法可以较好的预测碳纤维加固混凝土梁的抗弯受力性能,碳纤维的加固是可以延缓梁的破坏的,有利于提高梁的极限承载力,碳纤维加固的面积与层数对提高梁的刚度的贡献是明显的。

Strengthening RC member with carbon fibers is a prevalent method to improve bearing capacity and prolong useful life.The gluing area of the carbon fiber on RC T-beam of highway in the ideal conditions is computed with ANSYS.The modeling,computation and analysis of the RC T-beam strengthened with the carbon fiber are carried out and are compared with experimental results for different thicknesses and reinforcement ratios.The results illustrate that the finite element nonlinear analysis method can forecast the bending capacity of the RC T-beam,and carbon fiber strenthening area and layers can improve its bearing capacity and stiffness.