Abstract：
Based on strengthening project of a reinforced concrete building constructed during the period of the Republic of China in Nanjing, some key problems in strengthening design of reinforced concrete frame structures built during the period of the Republic of China are roundly discussed, including methods of testing and appraisement, computing and analyzing, foundation reinforcement, brick wall reinforcement, concrete members reinforcement and seismic reinforcement, etc. Some effective methods are introduced to solve the problems.
