Compression tests were conducted on CFRP strengthened short steel columns with H-shaped and rectangular cross-sections to target the seismic retrofit of truss bridges. The experimental parameters were each member’s thickness and the CFRP’s stacking direction, and the number of CFRP layers was designed from local buckling prior to yielding. The results showed that the maximum load and local buckling load were improved in all cases and that the existing design equation was applicable by considering the increased cross-sectional area of the CFRP.
