为探寻涂胶对炭纤维布力学性能的影响,深入了解其加固混凝土结构的力学行为,对制备的炭纤维强化板(CFRP)及其加固混凝土梁,分别进行了轴向拉伸和预制裂缝四点弯曲加载实验.对比有胶与无胶纤维布拉伸实验,表明环氧树脂不仅粘接纤维布,对纤维布有保护作用,而且能够显著提高其拉伸强度.通过对加固混凝土梁的FRP外贴应变片的加载过程进行电测跟踪测试,得到了材料结构损伤破坏过程曲线.由力学模型和曲线点拟合的最小二乘法,对CFRP板所受轴力及混凝土的界面剪应力分布进行分析,得到轴力及剪应力分布.在载荷的变化过程中,FRP与混凝土的界面逐渐脱粘,使得FRP的应力集中程度降低,有时会出现应变回弹现象.
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