Development of Bond Constitutive Law of RC Members with Corrosion

为评价混凝土约束程度对腐蚀损伤RC构件粘结应力行为的影响，进行了非爆炸拆除剂的膨胀试验。因此，保护​​层混凝土的厚度和混凝土的抗压强度对混凝土的约束程度影响很大，并且随着混凝土表面裂缝宽度的增加，混凝土的约束力呈指数下降。此外，还阐述了由于混凝土的约束程度而导致的粘结特性的恶化。该模型包括混凝土强度、保护层混凝土厚度、腐蚀膨胀压力和混凝土表面裂缝宽度的影响。

To evaluate the influence of the restraint degree of concrete on bond stress behavior of RC member damaged by corrosion, expansion test using nonexplosive demolition agent was carried out. As a result, the thickness of cover-concrete and the compressive strength of concrete greatly influence the restraint degree of concrete and the restraint of concrete decreases exponentially as the increase of crack width of the concrete surface. Furthermore, the deterioration of bond characteristics due to restraint degree of concrete was formulated. This model includes the influence of the concrete strength, thickness of cover-concrete, pressure of the corrosion expansion and crack width of the concrete surface.