Calculation Method Investigation on Jacketing Reinforcement of RC Eccentric Compressive Column Subjected to Fire

Based on eccentric compressive experiments of reinforced concrete column strengthened with jacketing method, the paper calculated and analyzed jacketing reinforcement of RC eccentric compressive column subjected to fire. The calculation procedure of residual load capacity of compressive member after fire was put forward according to temperature distribution at column section. To distinguish tensile or compressive failure of RC column, the formulas of relative balanced depth of compressive zone of jacketing section were deduced as well as the corresponding applied calculation method of norm section load capacity was presented under the second loaded stage. In addition, the reinforcement design and construction of one fire damaged building was conducted in terms of this paper's method. The good running status of strengthened columns for many years validates the applicability of this method.