对碳纤维布加固低屈服点钢筋混凝土梁的一次、二次受力情况进行试验研究及有限元数值仿真模拟分析。试验及模拟分析结果表明:粘贴碳纤维布能有效提高梁的承载力,一次受力情况下承载力的提高优于二次受力;随着粘贴碳纤维布胶层厚度的增加,纤维布应力滞后越明显;HPB235级钢筋混凝土梁加固后,同级荷载下与HRB335级钢和HRB400级钢筋混凝土梁相较碳纤维布应变较小。 Experimental research and finite element numerical simulation analysis of primary and secondary stress of CFRP strengthened low yield point reinforced concrete beam are carried out. The results of the test and simulation show that the carbon fiber cloth can effectively increase the bearing capacity of the beam, and the bearing capacity of the beam is better than that of the second force under the condition of a force. With the increase of the thickness of the gluing carbon fiber cloth, the stress hysteresis Obviously, the strain of HPB235 reinforced concrete beam is lower than that of HRB335 grade steel and HRB400 grade reinforced concrete beam under the same level of load.