Effect of Reinforcement Corrosion Sediment Distribution Characteristics on Concrete Damage Behavior  

作　　者：Fenghua Yuan Qing Zhang Xiaozhou Xia 

机构地区：[1]Department of Engineering Mechanics,Hohai University,Nanjing,210098,China

出　　处：《Computers, Materials & Continua》2019年第3期777-793,共17页计算机、材料和连续体（英文）

基　　金：We appreciate the support from National Natural Science Foundation of China Projects(Numbers 11672101,11372099 and 11132003);National Key Research and Development Program Project(Number:2017YFC1502603);Natural Science Foundation of Jiangsu Province(Number:BK20151493).

摘　　要：Reinforcement corrosion directly affects the mechanical behavior of reinforced concrete structures.An electric corrosion test was conducted on a reinforced concrete test specimen,and a finite element model of the reinforcement corrosion damage was established.In addition,the damage behavior of reinforced concrete under different corrosion sediment distribution characteristics and different corrosion rates was studied.It was noted that when corrosion sediments are in a“semiellipse+semicircle”distribution,the results of numerical calculation are consistent with those obtained experimentally,reflecting the damage characteristics of reinforced concrete test specimens.Further,the results showed that the distribution characteristics of corrosion sediments greatly influence the damage behavior of reinforced concrete.In particular,when the corrosion sediments demonstrate a“semiellipse”distribution,reinforced concrete members may easily suffer from reinforcement damages.In the case of“semiellipse+semicircle”and“circle”distributions,the cohesive force between the reinforcements and concrete decreases:With the same corrosion rate,the damaged area expands with the increase in the number of reinforcements,which indicates a reduction in the cohesive force and thus,a reduction in the damage in the reinforcement area.This paper analyzes in-depth the effects of reinforcement corrosion expansion on the concrete damage behavior,provides references for practical engineering.

关 键 词：Reinforced concrete corrosion damage numerical modeling chlorine salt corrosion durability. 

分 类 号：TG1[金属学及工艺—金属学]