In order to investigate the practical calculation method of bearing capacity of eccentrically compressed RC column strengthened with jackets

using the experimental data of 29 groups of strengthened columns

the bearing capacity computation methods of the GB 50367-2013"Code for Design of Strengthening Concrete Structure"and GB 50367-2006 "Code for Design of Strengthening Concrete Structure"were studied.Comparing calculated value and measured value of the bearing capacity of the specimens

the results show that the calculation results of bearing capacity of the two codes are close

but the overall accuracy of the calculation results is not good enough

which are biased towards insecurity.Especially for large eccentric compression columns

the bearing capacity calculation results are obvious unsafe.According to the mechanical failure characteristics of reinforced columns

three damage limit states were defined.Based on the analysis of the section strain distribution under the three limit states

the calculation formula of bearing capacity of the strengthened column was established.The results of verification show that the calculated results of the formula are in good agreement with the test results

and are biased towards security.