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현수교 센터스테이 피로균열 발생에 따른 피로손상도 평가
나성옥 ( Na Sung Ok ),임광현 ( Lim Kwang Hyeon ),정수형 ( Jung Soo Hyung ),박용순 ( Park Yoeng Soon ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
A fatigue crack occurred in the vicinity of the suspension bridge`s center-stay area is generated. Therefore, the stress and caused of occurrence of each member are analyzed by measurement. When similar cases occur in the future, they shall be utilized as basic data such as research methods and establishment of measures for maintenance.
나성옥 ( Na Sung Ok ),임광현 ( Lim Kwang Hyeon ),김대환 ( Kim Dae Hwan ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
A fatigue crack occurred in the vicinity of the center-stay area is generated. Therefore, the stress and caused of occurrence of each member are analyzed by measurement. When similar cases occur in the future, they shall be utilized as basic data such as research methods and establishment of mesures for maintenance.
김성완 ( Kim Sung Wan ),윤다운 ( Yun Da Woon ),박재봉 ( Park Jae Bong ),나성옥 ( Na Sung Ok ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
Because of the characteristics of long-span bridges, the cable tension is considered a critical item in their maintenance. In particular, because the evaluation of the cable tension in a suspension bridge is essential for understanding the general status of the structural system, identifying the initial values of this force in the construction of a bridge and then accurately predicting and comparing its estimated values during traffic use are very important tasks for the maintenance of a suspension bridge. In this paper, to verify the algorithm for estimating the cable tension of hanger cables using the back analysis technique, an ambient vibration test was conducted at a suspension bridge.
김성완 ( Kim Sung Wan ),윤다운 ( Yun Da Woon ),박재봉 ( Park Jae Bong ),나성옥 ( Na Sung Ok ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
In this study, digital image processing was used to estimate the tensile forces of the remote hanger cable using image-based back analysis method. A portable digital camcorder was used as a vision-based system considering convenient and economical aspects for use. The ambient vibration test was performed on a suspension bridge to verify the validity of the image-back analysis method of measuring the hanger cable tensile force.
박시현 ( Park Si Hyeon ),나성옥 ( Na Sung Ok ),진혜근 ( Jin Hye Geun ),박순목 ( Park Sun Mok ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
최근 집중호우와 태풍 등으로 인한 시설물 붕괴, 제방 유실 등의 피해가 지속적으로 발생하고 있어 기후변화에 따른 시설물 안전관리에 대한 관심이 증대되고 있다. 지난 2020년 집중호우로 세굴과 월류가 발생하여 교량붕괴와 제방유실 등의 피해가 발생하였으며, 사고가 발생한 대부분의 시설물은 소규모시설에 집중되어있었다. 본 연구는 기후변화에 따른 집중호우 등으로 인한 시설물 붕괴 원인을 규명하고 시설물 안전관리에 대한 기술적ㆍ제도적인 측면에서 지향해야 할 국가 주요시설물의 안전관리방안에 대하여 제안하고자 한다.