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이진옥(Lee, Chinok),윤경민(Yun, Kyungmin),김정중(Kim, Jungjoong),민경환(Min, Kyunghwan),임남형(Lim, Namhyoung) 한국방재학회 2018 한국방재학회논문집 Vol.18 No.4
교량상에 설치되는 장대레일은 궤도-교량 상호작용에 의한 영향을 검토해야 한다. 교량상 콘크리트궤도의 경우 레일 체결장치의 종방향 저항력에 의하여 궤도 종방향 저항력이 결정되며, KR C-08080(궤도-교량 종방향 상호작용)에 제시된 값을 이용하여 궤도의 안전성 검토를 수행한다. 그러나 KR code에서 제시된 궤도 종방향 저항력을 사용할 경우 매우 보수적인 설계가 이루어진다. 따라서 실제 부설되는 체결장치의 종류를 고려한 저항력이 제안되어야 한다. 본 연구에서는 레일 체결장치의 실내 실험을 수행하여 결과를 분석하였으며, 저항력의 통계적 특성을 반영하여 경제적이고 안전측 설계를 가능케 하는 종방향 저항력을 결정하였다. The continuous welded rails (CWR) installed on railway bridges should be checked for the effects of track-bridge interactions. In the case of a concrete track on a bridge, the longitudinal resistance of the track is determined by the longitudinal resistance of the rail fastening system, and the safety of track is assessed by using the longitudinal resistance given in KR C-08080 (track-bridge longitudinal interaction). However, a very conservative design is derived when using the longitudinal resistance values presented in the KR code. Therefore, a longitudinal resistance considering the type of fastening system actually installed should be proposed. In this study, the results of the laboratory tests of the rail fastening system were analyzed and the longitudinal resistance was determined to enable the economic and safe side design, reflecting the statistical characteristics of the resistance.
이진옥(Lee, Chinok),윤경민(Yun, Kyungmin),김정중(Kim, Jungjoong),민경환(Min, Kyunghwan),임남형(Lim, Namhyoung) 한국방재학회 2018 한국방재학회지 Vol.18 No.4
교량상에 설치되는 장대레일은 궤도-교량 상호작용에 의한 영향을 검토해야 한다. 교량상 콘크리트궤도의 경우 레일 체결장치의 종방향 저항력에 의하여 궤도 종방향 저항력이 결정되며, KR C-08080(궤도-교량 종방향 상호작용)에 제시된 값을 이용하여 궤도의 안전성 검토를 수행한다. 그러나 KR code에서 제시된 궤도 종방향 저항력을 사용할 경우 매우 보수적인 설계가 이루어진다. 따라서 실제 부설되는 체결장치의 종류를 고려한 저항력이 제안되어야 한다. 본 연구에서는 레일 체결장치의 실내 실험을 수행하여 결과를 분석하였으며, 저항력의 통계적 특성을 반영하여 경제적이고 안전측 설계를 가능케 하는 종방향 저항력을 결정하였다. The continuous welded rails (CWR) installed on railway bridges should be checked for the effects of track-bridge interactions. In the case of a concrete track on a bridge, the longitudinal resistance of the track is determined by the longitudinal resistance of the rail fastening system, and the safety of track is assessed by using the longitudinal resistance given in KR C-08080 (track-bridge longitudinal interaction). However, a very conservative design is derived when using the longitudinal resistance values presented in the KR code. Therefore, a longitudinal resistance considering the type of fastening system actually installed should be proposed. In this study, the results of the laboratory tests of the rail fastening system were analyzed and the longitudinal resistance was determined to enable the economic and safe side design, reflecting the statistical characteristics of the resistance.
전단형 MR 댐퍼를 이용한 케이블 교량의 실시간 진동제어-파워 모델 및 리야프노브 제어 중심으로
허광희,이진옥,전승곤,김충길,전준용,Heo, Gwanghee,Lee, Chinok,Jeon, Seunggon,Kim, Chunggil,Jeon, Joonryong 한국지진공학회 2017 한국지진공학회논문집 Vol.21 No.5
In this paper, an experimental study was carried out for vibration control of cable bridges with structurally flexible characteristics. For the experiment on vibration control, a model bridge was constructed by reducing the Seohae Grand Bridge and the shear type MR damper was designed using the wind load response measured at Seohae Grand Bridge. The shear type MR damper was installed in the vertical direction at the middle span of the model bridge, and dynamic modeling was performed using the power model. The tests of the vibration control were carried out by non-control, passive on/off control and Lyapunov control method on model bridge with scaled wind load response. The performance of the vibration control was evaluated by calculating absolute maximum displacement, RMS displacement, absolute maximum acceleration, RMS acceleration, and size of applied power using the response (displacement, acceleration, etc.) from the model bridge. As a result, the power model was effective in simulating the nonlinear behavior of the MR damper, and the Lyapunov control method using the MR damper was able to control the vibration of the structure and reduce the size of the power supply.
실시간 교량 모니터링을 위한 MEMS 기반의 스마트 센서 시스템
김만구(Kim Mangoo),이진옥(Lee Chinok),허광희(Heo Gwanghee),이우상(Lee Woosang) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
The purpose of this study was to use Micro Electro Mechanical Systems(MEMS) technology to develop a smart sensor system and apply it to real-time monitoring of a bridge structure. MEMS refers to a system in which electronic circuits and mechanical parts are integrated on a chip. The existing sensors of this type used mechanical conversion system and were high in price and relatively big in size. However, the new sensor using MEMS technology can be mass produced, low in price, and small in size to be suitable for electronic circuits and smart sensors. This study implemented indoor experiments to evaluate basic performance of the new sensor system and fabricated a bridge model to gather data and evaluate applicability of the new sensor onto the real-time monitoring of a bridge structure. The experiments resulted in the conclusion that MEMS-based smart sensor system can be applied to real-time monitoring of bridges.
실시간 교량 모니터링을 위한 MEMS 기반의 스마트 센서 시스템
김만구 ( Kim Mangoo ),이진옥 ( Lee Chinok ),허광희 ( Heo Gwanghee ),이우상 ( Lee Woosang ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
The purpose of this study was to use Micro Electro Mechanical Systems(MEMS) technology to develop a smart sensor system and apply it to real-time monitoring of a bridge structure. MEMS refers to a system in which electronic circuits and mechanical parts are integrated on a chip. The existing sensors of this type used mechanical conversion system and were high in price and relatively big in size. However, the new sensor using MEMS technology can be mass produced, low in price, and small in size to be suitable for electronic circuits and smart sensors. This study implemented indoor experiments to evaluate basic performance of the new sensor system and fabricated a bridge model to gather data and evaluate applicability of the new sensor onto the real-time monitoring of a bridge structure. The experiments resulted in the conclusion that MEMS-based smart sensor system can be applied to real-time monitoring of bridges.
다경간 교량의 충돌 제어를 위한 개선된 SMC 알고리즘의 성능 평가
허광희 ( Heo Gwanghee ),김충길 ( Kim Chunggil ),이진옥 ( Lee Chinok ),서상구 ( Seo Sanggu ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
This paper aims to developed SMC-Fractional algorithm, that is, enhances the performance of Sliding Mode Control(SMC) algorithm for pounding control of Multi-span bridges using MR-damper. The pounding control performance of SMC-Fractional algorithm has been evaluated in shaking table test on multi-span bridge. As a result of the experiment, the SMC-Fractional algorithm showed the performance od reducing the relative displacement of adjacent spans over other algorithms.
허광희 ( Heo Gwanghee ),김충길 ( Kim Chunggil ),방건혁 ( Bang Geonhyeok ),이진옥 ( Lee Chinok ),박채린 ( Park Chaerin ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
In this paper, a hydraulic damper was developed to protect the storage racks from earthquakes and the seismic performance of the storage racks was improved by applying the developed damper. In order to achieve these goals, the control capacity for the safety of the storage racks was determined, and a hydraulic damper satisfying the control capacity was designed and manufactured. In addition, the location of the hydraulic damper was determined through simulation. Finally, the shaking table test was carried out. As a result, the seismic performance improvement of the storage racks using the hydraulic damper was confirmed.