反拱法加固后RC梁的受力性能分析

摘要

The mechanical property of strengthening RC girder by using the method of arch pasting with carbon fiber and directly pasting CFRP through numerical simulation and model test is analyzed. It explains that strengthening RC girder by using the method of arch can solve the influence of girder' s loading by the second time which exists in the method of pasting CFRP in strengthening reinforced concrete beams, improve the girder' s load when it cracks and the carrying capacity, and decrease the deflection deformation and crack width and gap when the girder carries load. It can make the most use of the character of carbon fiber's high strength.%通过数值模拟和模型试验分析了反拱法CFRP布加固RC梁和直接粘贴CFRP布加固RC梁的受力性能.结果表明,反拱法加固RC梁能有效地解决直接粘贴CFRP加固钢筋混凝土梁中存在的二次受力问题,有效地提高RC梁的开裂荷载,小幅提高RC梁的承载能力；减小RC梁受力时的扰度变形及裂缝宽度和间距；可充分发挥碳纤维布材料高强抗拉的特性.