Investigation of the Design Formulas and Experiments for the Seismic Strengthening of Reinforced-Concrete and Steel-Reinforced-Concrete Columns
By Kiyoshi Masuo
Concrete Journal, Vol.34, No.10, Oct. 1996
- Synopsis
- This study aims to clarify the fundamental data for the sismic design of strengthening ofexiting buildinds. In this paper, three kinds of jacketing are applied for strengthening of reinforced-concrete and steel-reinforced-concrete columns. Shear reinforcements, steelplates and carbon fiber reinforcements are used as jackets. The ultimate strength and ductility factor of strengthened columns are evaluated by design formulas for the seismicstrengthening of exiting buildings. Strengthening effects of steel plates and carbon fiber reinforcements are evaluated through the replaced shear reinforcements ratios. Then, it is shown that such calculated values are conservatively evaluated as compared with experimental results. Also, strengthened columns with the sufficient amount of jacketing, flexurally fail at ends of members, and the adepuate ultimate strength and ductile performance are obtained, regardless of above mentioned jacketing methods.
- Keywords:
- seismic strengthening, shear reinforcing, steel plate reinforcing, carbon fiber reinforcing, ultimate strength, ductility factor
