A Study on Repair Method of Carbon Fiber Reinforced Wind Power Tower Yeou-Fong Li1 , Wei-Ming Kao2 1Professor of the Department of Civil Engineering , NTUT, Taipei, Taiwan . 2Master of the Department of Civil Engineering, NTUT, Taipei, Taiwan. Introduction: This study aimed at collecting, discussing and assembling the damage modes of damaged towers. The carbon fiber reinforced polymer (CFRP) composite material was used to repair the wind turbine tower. The study planned four CFRP repair method directions, with one layer and two layers of repair method of CFRP. The scale down wind turbines tower structure is simulation by hollow steel pipe, and to proof the repair method of CFRP material, we use the pushover test on scale down model. From the repair method of one layer, 30 degrees and 90 + 0 degrees of the model have better confinement force of the repair method patch, which CFRP will not have the phenomenon of delamination. The repair method of two layers, damaged position of the experiment changed to the fixed end, which prove the repair method is effective. In addition, the experiment data and pushover test results will do mechanics of the various reinforcing analysis, and compared with the test results. Through the results of this study, according to the damage of the structure of the wind turbines tower, a feasible repair method and calculation method will put forward for the reference of the relevant researchers. Keywords： wind power tower, carbon fiber reinforced polymer composite material, renewable energy, repair method Specimen Name of Specimen Benchmark 1 layer CFRP 2 layers CFRP S36 SF36C30 SF36C302 SF36 SF36C45 SF36C452   SF36C60 SF36C602 SF36C90 SF36C902 S36 SF36 ɵ CFRP Repair Method Pushover Test Setup Benchmark Pushover Test Results S36 SF36 Pushover Test Results SF36C302 SF36C452 SF36C602 SF36C902 Comparison between Analysis and Experiment Specimen Test results (kgf-mm ) Calculated Moment (measured CFRP strain) (kgf-mm) (CFRP limit strain) (Composite section ) Failure mode SF36C302 782227 615039 691121 857981 Fixed end bending SF36C452 745290 671544 832939 877202 SF36C602 790800 553001 941754 891652 SF36C902 790200 565586 1033488 906132