In a word, there are more method for structural strengthening,like carbon fiber reinforcement, steel jacketing reinforcement or increase cross section.We choose based on what?

Through the structure calculation with the structure characteristics, we can choose carbon fiber strengthening when the tensile bearing capacity of the tensile member is not so bad(because there was no anchorage); poor more and less than 40%,we will choose steel plate bonding; more than 40% ,we will choose steel jacketing or add beam;When the insufficiency of the inspection section is used to increase the cross section.