The assessment for bearing capacity of corroded RC members is one of the main component of durability study on RC structure. But few researches had been developed for the study of corroded RC eccentric especially litt...The assessment for bearing capacity of corroded RC members is one of the main component of durability study on RC structure. But few researches had been developed for the study of corroded RC eccentric especially little eccentric compressive members. By discussing the effect of factors, such as decrease of concrete strength in biaxial stress condition during pre-cracking stage and torsion buckling of local cracking concrete during post-cracking stage, on the bearing capacity of little eccentric RC members, the model of bearing capacity is established respectively, which the cracking damage coefficient of concrete k is suggested to be 0.15 in post-cracking stage. The experimental certification shows: model calculation fits well with experimental result, which proves the effectiveness of the model in this paper.展开更多
A finite element calculation model of corroded RC eccentric compressive members was build using finite element software ANSYS. The model considers the decline of mechanical properties and the effective section of a co...A finite element calculation model of corroded RC eccentric compressive members was build using finite element software ANSYS. The model considers the decline of mechanical properties and the effective section of a corroded steel bar,as well as the deterioration of bond character between corroded reinforcement and concrete. The reliability of the finite element model was evaluated by comparing the results of the finite element calculation with the data from experiments. Based on the finite element analysis results,the influence of corrosion degree,the diameter change of the longitudinal reinforcing bars and the spacing change of stirrups on the flexural stiffness were calculated and analyzed.展开更多
基金Funded by the National Natural Science Foundation of China (No. 50278039 and 50538070)
文摘The assessment for bearing capacity of corroded RC members is one of the main component of durability study on RC structure. But few researches had been developed for the study of corroded RC eccentric especially little eccentric compressive members. By discussing the effect of factors, such as decrease of concrete strength in biaxial stress condition during pre-cracking stage and torsion buckling of local cracking concrete during post-cracking stage, on the bearing capacity of little eccentric RC members, the model of bearing capacity is established respectively, which the cracking damage coefficient of concrete k is suggested to be 0.15 in post-cracking stage. The experimental certification shows: model calculation fits well with experimental result, which proves the effectiveness of the model in this paper.
基金The National Natural Science Foundation of China (No.50578068)
文摘A finite element calculation model of corroded RC eccentric compressive members was build using finite element software ANSYS. The model considers the decline of mechanical properties and the effective section of a corroded steel bar,as well as the deterioration of bond character between corroded reinforcement and concrete. The reliability of the finite element model was evaluated by comparing the results of the finite element calculation with the data from experiments. Based on the finite element analysis results,the influence of corrosion degree,the diameter change of the longitudinal reinforcing bars and the spacing change of stirrups on the flexural stiffness were calculated and analyzed.
