[논문]건축물 내 방송통신설비를 위한 면진장치의 동적거동

정새벽; 최형석; 서영득; 정동혁

doi:10.11112/jksmi.2022.26.1.39

건축물 내 방송통신설비를 위한 면진장치의 동적거동
Dynamic Responses of Base Isolation Devices for Telecommunication Equipment in Building Structures 원문보기

한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.26 no.1, 2022년, pp.39 - 48

정새벽 (부산대학교 건축공학과) , 최형석 (부산대학교 지진방재연구센터) , 서영득 (부산대학교 지진방재연구센터) , 정동혁 (부산대학교 건축공학과)

초록
AI-Helper

지진 발생 시 방송통신서비스는 현장 구조 및 효과적인 복구 작업에 직결된다. 최근에 다양한 면진장치들이 방송통신설비의 심각한 피해를 방지하기 위하여 건물 층과 방송통신설비의 바닥부 사이에 설치하는 방법이 널리 사용되고 있다. 하지만 긴 고유주기를 가진 건물은 공진현상에 따른 예상치 못한 응답증폭으로 인하여 더 큰 피해가 발생할 수도 있다. 따라서 본 연구에서는 두 개의 면진장치를 선정 후 중층, 고층건물의 해석적, 실험적 연구를 통하여 면진장치가 바닥부에 설치된 방송통신설비의 내진 안전성을 평가를 목표로 한다. 해석적 연구를 수행하여 가진 시 중층, 고층건물 최고층의 저주파수 영역대의 동적응답을 확인하였다. 또한 해석적 연구에서 확보한 층응답을 바닥부에 면진장치가 설치된 방송통신 설비를구비하여 실증 실험을 통해 내진안정성을 평가하였다.

Abstract ▼ AI-Helper

In earthquake situations, broadcasting and communication services are directly linked to rapid on-site rescue and effective restoration works. Recently, a variety of base isolation devices are widely introduced on building floors to avoid critical seismic damages of telecommunication facilities. However, in buildings with long fundamental periods, those devices may have undesirable amplification of seismic responses due to resonance effect between the building floors and base isolation devices. This study performs the seismic safety evaluation of two types of base isolation devices deployed for telecommunication facilities in mid- and high-rise buildings through numerical and experimental approaches. It is found that mid- and high-rise buildings can have low-frequency dynamic responses at the top floor when being subjected to design basis earthquake loading. Furthermore, bi-directional shake table testing demonstrated that the selected base isolation devices can exhibit unstable dynamic behaviors under such low-frequency excitations of the floor.

주제어

표/그림 (19)

그림 Fig. 1 Comparison of RRS (2% damping) provided by various international standards
그림 Fig. 2 Floor plan of buildings
표 Table 1 Information of buildings
그림 Fig. 3 3-D numerical models of building strucures
그림 Fig. 4 Modeling of beam elements
그림 Fig. 5 Artificial earthquake corresponding to design response spectrum
표 Table 2 Dynamic properties of buildings
그림 Fig. 6 Acceleration time history at the top floor
그림 Fig. 7 Inter-story drift ratios of buildings
그림 Fig. 8 Acceleration time history at the top floor
그림 Fig. 9 Test motions for Test-1 corresponding to RRS of NRRA
그림 Fig. 10 Shake table test setup
그림 Fig. 11 Base isolation devices used in this study
표 Table 3 Shake table test plan
표 Table 4 Properties of base isolator devices
그림 Fig. 12 Displacement time history of shake table and cabinet in X-direction
그림 Fig. 13 Status of base isolation devices after Test-3
그림 Fig. 14 Relative displacement of base isolation devices
표 Table 5 Summary of shake table test results

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