Seismic Retrofit Technique of Existing Reinforced Concrete Column with Sidewall using Polymer-cement Mortar and Prefabricated Reinforcing Unit
By S. Tago, T. Sugiyama, T. Ido and Y. Matsuzaki
Concrete Journal, Vol.49, No.12, Dec. 2011
- Synopsis
- Authors proposed a seismic retrofitting technique for existing RC columns with cast-in-place RC sidewall using polymer-cement mortar (PCM). In the technique, additional shear reinforcement (hoops of column and/or horizontal shear reinforcement of sidewal1; prefabricated reinforcing unit) is adhered to the surfaces of existing RC columns with RC sidewall by applying PCM. The strengthened area (additional reinforcement and PCM) and existing member are strongly joined by the high adhesive strength of the PCM. The design / construction guideline of this seismic retrofit technique obtained the technology assessment of the Japan Building Disaster Prevention Association. The present paper introduces the effect of this seismic technique and the outline of the guideline.
- Keywords:
- seismic retrofit, RC Column with sidewall, polymer-cement mortar, shear, prefabricated reinforcing unit, capacity and ductility
