PROPOSAL OF INDEX FOR EVALUATING EFFICIENCY OF SEISMIC RETROFITTING APPLIED TO EXISTING RC BUILDINGS CONSIDERING FUTURE EARTHQUAKES, CONSTRUCTION COSTS AND ENVIRONMENTAL LOAD - Yoshida, Himari; Miura, Kota; Suzuki, Yohei; Akiya, Riho; Shegay, Alex; Monical, Jonathan; Suzuki, Yusuke; Goto, Yutaka; Maeda, Masaki; Seki, Matsutaro (AIJ Journal of Technology and Design, 2025)