Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Full-scale Shaking Table Test of Uninterruptible Power Supply Installed in 2-stories Steel Structure

2층 철골 구조물에 설치된 무정전전원장치의 실규모 진동대 실험연구

  • Received : 2022.02.15
  • Accepted : 2022.06.30
  • Published : 2022.06.30
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Abstract

In this study, the shaking table tests were carried out on six types of non-structural elements installed on a full-scale two-story steel structure. The shaking table tests were performed for non-structural elements with and without seismic isolators. In this study, the seismic performance of Uninterruptible Power Supply (UPS) specimens was tested and investigated. Non-seismic details were composed of conventional channel section steel beams, and the seismic isolators were composed of high damping rubber bearing (HDRB) and wire isolator. The input acceleration time histories were artificially generated to satisfy the requirements proposed by the ICC-ES AC156 code. Based on the test results, the damage and dynamic characteristics of the UPS with the seismic isolator were investigated in terms of the natural frequency, damping ratio, acceleration time history responses, dynamic amplification factors, and relative displacements. The results from the shaking table showed that the dynamic characteristics of the UPS including the acceleration response were significantly improved when using the seismic isolator.

본 연구에서는 실규모의 2층 철골 구조물에 7종의 건축 및 비건축 비구조요소를 설치하여 진동대 실험을 수행하였다. 진동대 실험은 현행 비내진상세와 면진장치를 적용한 실험으로 두 차례 수행되었으며 본 연구에서는 무정전전원장치(UPS)의 내진성능에 대하여 실험 및 분석하였다. 비내진정착상세로는 UPS 하단에 ㄷ형강 다리부가 설치되었고, 면진장치로는 고감쇠고무와 와이어로프로 구성된 개발 복합면진장치가 사용되었다. 지진하중모사를 위하여 ICC-ES AC156 (2010)에 따라 인공지진파를 생성 후, 동일 지진파의 크기를 점증하여 가진하였다. 진동대실험을 통해 복합면진장치의 적용여부에 따른 UPS의 거동 및 동적 특성(응답가속도, 응답변위, 동증폭계수, 고유진동수, 감쇠비)을 비교 및 분석하였다. 실험결과, 복합면진장치를 적용함에 따라 UPS의 고유진동수가 감소하여 응답가속도 및 증폭계수가 크게 감소하는 것으로 확인되었다.

Keywords

Acknowledgement

본 논문은 한국연구재단 대학중점연구소지원사업의 연구비 지원 (NRF- 2022R1A6A1A03044977)에 의해 수행되었습니다.

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