In order to carry out the seismic isolation retrofit works safely and effectively against great axial force of upper structure, we developed a new temporary supporting method applying shear force transfer mechanism by prestressed joints of a column. The proposed method is able to secure enough space by eliminating unnecessary supporting structures on the isolation floor after the retrofit. Full scale tests were conducted to evaluate vertical load support capacities of the method. We investigates that failure mode of the support system, shear strength of the prestressed joint and load deformation characteristics were revealed from the experimental results. Consequently, it has been confirmed that the proposed method would secure the safety and high performance during the period of retrofit works by the shear force transfer capacities.
