Research On Strengthening Of The Damaged Frame Structure In An Earthquake With CFRP

China is a country prone to earthquakes. According to the field survey and analysis, most of seriously damaged buildings and all commonly damaged ones in earthquakes can still be used after appropriate maintenance and reinforcement. The reinforcement scheme directly influences the investment of capital and, more importantly, the quality of reinforcement. Abundant resource of information is obtained since the research on maintenance and reinforcement of concrete structures by carbon fiber sheet began in China in the 1990s. However, the main purpose of the previous research lay in CFRP reinforced single components and joints such as simply supported beams, overhanging beams and columns while there is little research on integral frame structures of reinforced concrete. In view of this, the reinforcement design and experimental study of damaged concrete frame structures constitute the main contents of this dissertation. Two frames were designed to be subjected to horizontal low cyclic loading, one for reinforcement and another for comparison. The tests show that the seismic behavior of concrete frame structures can be improved after reinforced with CFRP and the ductility of frame structures be increased significantly after joints' reinforcement. The reinforcement scheme is proved feasible. The models of the two test specimens were created by the finite element analysis package ABAQUS and nonlinear simulations were performed. Excellent agreement is observed when comparing the results of the experiment with those from the simulations. The reinforcement effect was investigated and the experience in testing was introduced for possible application to practical reinforcement projects in future.