Abstract:To accurately reflect the true crack pattern of concrete structure discontinuous process from cracking to failure under the action of internal steel reinforcement corrosion,we take the electrochemical accelerated corrosion of internal reinforcement in reinforced concrete (RC) specimens as the object,adopt a joint action model of reinforcement-corrosion product-concrete to study the cracking and failure behavior of RC structures under internal reinforcement corrosion,and reveal the influence of internal reinforcement corrosion amount on the true crack pattern of RC structure.The results show that the employed joint action model of steel reinforcement-corrosion product-concrete can reflect the cracking behavior of RC structure under the action of internal steel reinforcement corrosion.Moreover,the surface and internal cracks appear in RC specimen as the amount of internal steel reinforcement corrosion increases under the action of internal steel reinforcement corrosion in RC specimen,and the width increase of the aforementioned cracks in the early stage of crack development is greater than that in the later stage.The reason is that the infiltration of reinforcement corrosion products into the internal cracks of RC specimens during crack development slows down the expansion pressure caused by internal reinforcement corrosion.
