【摘要】 为深入认识地下储气库FRP-混凝土界面在压剪条件下的黏结性能，采用室内直剪试验研究了FRP-混凝土界面在法向应力、混凝土表面粗糙度、胶层厚度和混凝土强度等4种影响因素变化条件下的黏结性能变化规律。结果表明：在压剪条件下，FRP-混凝土界面主要产生混凝土表层的剥离破坏；界面剪应力与位移之间呈现出显著的非线性变化特征；界面的剪切强度和刚度随着界面法向应力、混凝土表面粗糙度、胶层厚度和混凝土强度的增大而增大；摩尔-库仑强度准则可用于描述界面在压剪条件下的屈服破坏行为。更多还原

【Abstract】 In order to further understand the bond behavior of FRP-concrete interface in underground gas storage under combined compression and shear conditions, an indoor direct shear test was conducted to study the bond performance of the FRP-concrete interface under varying influencing factors, including normal stress, concrete surface roughness, adhesive thickness and concrete strength. The results show that the FRP-concrete interface is mainly characterized by debonding failure of the concrete surface under the combined compression and shear conditions. A significant nonlinear relationship exists between the interfacial shear stress and displacement. The strength and stiffness of the interface increase with the increase of normal stress, concrete surface roughness, adhesive thickness and concrete strength. The Mohr-Coulomb criterion can be used to describe the yield failure behavior of the interface under compression and shear conditions.更多还原