Abstract
Excitation and system identification are carried out for a full-scale five-story structure to obtain fundamental data which will be used for the design of viscoelastic dampers, The hybrid mass driver(HMD) installed on the fifth floor was employed as external exciter to provide excitation for the building, Each floor response was measured and processed to find out where and how the viscoelastic dampers are located and designed. The sine-sweep and white noise loadings were applied to the structure by the HMD to obtain dynamic characteristics such as natural frequencies, damping ratios, and modes, The identified building was experimentally investigated again with the designed viscoelastic dampers installed at inter-stories to obtain the response behavior in the companion paper.
점탄성 감쇠기의 설계를 위한 자료를 얻기 위해 실물크기 5층 건물에 대해 가진과 시스템 식별을 수행하였다. 5층 바닥에 설치된 HWD는 건물을 움직이는 외부 가진력으로 작용하였고, 각 층의 응답을 측정하여 점탄성 감쇠기의 용량과 최적위치에 필요한 자료를 확보하였다. 고유진동수, 감쇠비, 모드와 같은 동적특성을 파악하기 위해 건물에 HMD로 조화하중과 백색잡음 하중을 주어 실험을 수행하였다. 동반논문에서는 건물의 층간에 설계된 점탄성 감쇠기를 설치한 후 응답 거동을 얻기 위한 실험 연구를 수행하였다.
