유사동적실험기반 내부접합형 합성내진보강공법을 적용한 기존 R/C 건물의 내진성능평가

초록

In this study, in order to enhance the joint capacity between the existing reinforced concrete (R/C) frame and the reinforcement member,we proposed a novel concept of Internal Composite Seismic Strengthening Method (CSSM) for seismic retrofit of existing domestic medium-to-low-riseR/C buildings. The Internal CSSM rehabilitation system is a type of strength-enhancing reinforcement systems, to easily increase the ultimate horizontalshear capacity of R/C structures without seismic details in Korea, which show shear collapse mechanism. Two test specimens of full-size two-story R/Cframe were fabricated based on an existing domestic R/C building without seismic details, and then retrofitted by using the proposed CSSM seismicsystem; therefore, one control test specimen and one test specimen reinforced with the CSSM system were used. Pseudo-dynamic testing was carriedout to evaluate seismic strengthening effects, and the seismic response characteristics of the proposed system, in terms of the maximum shear force,response story drift, and seismic damage degree compared with the control specimen (R/C bare frame). Experiment results indicated that the proposedCSSM reinforcement system, internally installed to the existing R/C frame, effectively enhanced the horizontal shear force, resulting in reduced storydrift of R/C buildings even under a massive earthquake.

키워드