作　　者： ; ; ;

机构地区： 武汉大学土木建筑工程学院

出　　处： 《哈尔滨工业大学学报》 2005年第10期1423-1425,1435,共4页

摘　　要： 通过对4根存在较大宽度裂缝的混凝土梁在反向加载条件下的碳纤维(CFRP)加固试验,研究了反向加载条件下碳纤维加固梁在各个不同加载阶段的力学性能及应变规律,研究结果表明:在同样的碳纤维的用量下,反向加载条件下碳纤维加固后的混凝土梁的钢筋的屈服将比不采用该方法加固的梁来得更晚,加固梁的弹性工作阶段得以延长,提高了碳纤维的利用率,对于提高混凝土梁的主要力学指标具有显著效果. Discusses the strengthened the four seriously damaged concrete beams with carbon fiber reinforced plastic sheet under the opposite side loading condition. Analyze the change of stress and meet an emergency of parts of the beams, the submitting of steel reinforcing bar strengthened with carbon fiber reinforced plastic sheet under the opposite side loading condition will later than that of steel reinforcing bar without this method even though they contain the same amount carbon fiber, and prolong the elasticity phase of beams, can better utilized the carbon fiber, the reliability index of beams can be inevitably enhanced.

关 键 词： 碳纤维 反向加载 加固 混凝土梁 应变 受力

领　　域： [建筑科学]