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한경봉(Han Kyung-Bong),박준명(Park Jun-Myung),박선규(Park Sun-Kyu),김영진(Kim Young-Jin),최석정(Choi Suk-Jung) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
The seismic performance evaluation and retrofit process are very important in old existing bridge If the result is not appropriate, then a retrofit process are required Among a various retrofit method, the seismic Isolation is very useful method. Because it can be applied instead of old bearing In bridge In this study, effectiveness of seismic Isolation is rationally verified For this purpose, two seismic isolations used widely are selected and pseudo dynamic test are performed. Through the pseudo dynamic tests, it is showed that seismic isolations are reducing the magnitude of the forces transferred to the substructure and shifting the period of the bridge
한경봉 ( Han Kyung-Bong ),박준명 ( Park Jun-myung ),박선규 ( Park Sun-Kyu ),김영진 ( Kim Young-jin ),최석정 ( Choi Suk-jung ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
The seismic performance evaluation and retrofit process are very important in old existing bridge. If the result is not appropriate, then a retrofit process are required. Among a various retrofit method, the seismic isolation is very useful method. Because it can be applied instead of old bearing in bridge. In this study, effectiveness of seismic isolation is rationally verified. For this purpose, two seismic isolations used widely are selected and pseudo dynamic test are performed. Through the pseudo dynamic tests, it is showed that seismic isolations are reducing the magnitude of the forces transferred to the substructure and shifting the period of the bridge.
제주 실증단지 적용 송전선 온라인 감시시스템 구성 검토
최상봉(Sang Bong Choi),이원태(Won Tae Lee),정성환(Seong Hwan Jeong),장준영(Jun Young Jang),한경태(Kyung Tae Han) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
It is required to raise availability ratio of exist power facility at home and abroad because of various reasons, like increased line pass appeals, high construction cost, etc. To solve these problems, it is necessary to develop system not only to increase transmission capability by raising flexibility and availability of transmission line through watching of load flow but also to suppress cost of new transmission line. Accordingly, in this paper it is reviewed construction of transmission on-line surveillance system to apply in Jeju demonstration system to watch transmission line and raise transmission capability in emergency state such as transmission failure.
김민지(Kim Min-Ji),한경봉(Han Kyung-Bong),박선규(Park Sun-Kyu) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
The seismic performance evaluation and retrofit process are very important in old existing bridge. If the result is not appropriate, then a retrofit process are required. Among a various retrofit method, the seismic isolation is very useful method. Because it can be applied instead of old bearing in bridge. In this study, effectiveness of seismic isolation is rationally verified. For this purpose, two seismic isolations used widely are selected and static and dynamic analysis are performed. Through the nonlinear time history analysis and response spectrum analysis, it is showed that seismic isolations are reducing the magnitude of the forces transferred to the substructure and shifting the period of the bridge.
정배근 ( Jeung Bae-keun ),한경봉 ( Han Kyung-bong ),엄준식 ( Eom Jun-sik ),박선규 ( Park Sun-kyu ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 논문집 Vol.7 No.2
The technique of posttensioning has been used successfully to improve the performance of existing concrete structures. However, very few applications of this technique can be found in steel structures. Posttensioning by means of high strength cable or bar can be used to effectively increase the working load capacity of Truss Bridges. The benefits of posttensioning trusses can be achieved in strengthening of existing structures as well as in the design of new structures. In this paper, the elastic behavior of posttensioned trusses with straight and draped tendon profiles is examined. For the analysis of posttensioned trusses in the elastic range of behavior, two methods are presented, namely, the flexibility method and the mixed-method, i.e., a combination of the stiffness and flexibility methods. Using the presented methods, the effects of design variables such as the tendon profile, truss type, prestress force, and tendon eccentricity on the working load and deflection of trusses are studied. The results show that the allowable load of truss increases proportionally with increase in prestress force and eccentricity. Posttesioning enlarges the elastic range, increases redundancy, and reduces deflection and member stresses. Thus, the remaining life of a truss bridge can be increased relatively inexpensively.
김민지 ( Kim Min-ji ),한경봉 ( Han Kyung-bong ),박선규 ( Park Sun-kyu ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1
The seismic performance evaluation and retrofit process are very important in old existing bridge. If the result is not appropriate, then a retrofit process are required. Among a various retrofit method, the seismic isolation is very useful method. Because it can be applied instead of old bearing in bridge. In this study, effectiveness of seismic isolation is rationally verified. For this purpose, two seismic isolations used widely are selected and static and dynamic analysis are performed. Through the nonlinear time history analysis and response spectrum analysis, it is showed that seismic isolations are reducing the magnitude of the forces transferred to the substructure and shifting the period of the bridge.