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이종순(Jong-Soon Lee),주환중(Hwan-Joong Joo),신재열(Jai-Yeoul Shin),윤성순(Sung-Sun Yoon),박선희(Sun-Hee Park),남형모(Hyoung-Mo Nam) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
Application of long-span bridge, which is affected by parameters such as span length, shoe boundary condition, track property and stiffness of superstructure and substructure etc., can vary. Especially, by CWR aspects of the axial force, long-span high speed railway bridges are limited at type and span length. In this study, in terms of CWR axial force, the long-span high-speed railway bridges without REJ(Rail Expansion Joint) is to propose the bridge type. Various Parameters analysis performed for the proposed type(Arch bridge, Cable-stayed bridge).
진동기반의 SI 기법을 이용한 현수교 행어의 장력 추정 : Ⅰ. 이론
박대효(Park Taehyo),문석용(Moon Seokyong),주환중(Joo Hwan Joong),김병화(Kim Byeong Hwa) 대한토목학회 2007 대한토목학회논문집 A Vol.27 No.2A
현수교 행어는 케이블의 일부가 클램프로 구속된 형태를 지니고 있어 단일 케이블을 모델로 한 기존의 고유진동수 기반의 장력 추정 방법들로는 정확한 장력 추정이 힘들다. 이러한 기존의 문제를 해결하기 위하여 본 논문에서는 고유진동수 정보만을 이용한 시스템 인식 기법이 시용되었다. 단일 케이블과는 다른 행어의 거동을 인식하기 위하여 3차원 유한요소모델이 구성되었으며 인식 대상으로 케이블 장력을 포함한 강성치들이 포함되었다. 제안된 방법의 검증을 위하여 다양한 경우에 대한 수치 검증이 이뤄졌으며 그 결과는 기존의 방법에 의한 결과와 비교, 검토되었다. Hanger cables in suspension bridges have a particular form - two parallel hanger cables are tied by a horizontal clamp. Hence, it is difficult to estimate the accurate tension of a hanger using the existing frequency-based method based on the simple mathematical model of a single cable. To resolve this problem, in this paper, a frequency-based system identification thechnique is adopted. The complex behavior of the hanger cables has been identified by the aid of a three dimensional finite element analysis. In conjunction with the system identification algorithm and the finite element analysis, tension and other flexural rigidities of the hanger cable has been identified by a proposed approach. To verify the proposed technique, a set of various numerical verifications have been conducted. Finally, the results from the proposed approach have been compared with those from the exising technique.
호남고속철도 교량상 400km/h급 전철주 적용에 따른 구조안전성 검토
이종순(Jong-Soon Lee),서주원(Ju-Won Seo),김모세(Mo-Seh Kim),주환중(Hwan-Joong Joo),하신용(Sin-Yong Ha) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10
400km/h급 전차선로를 개발하여 350km/h급으로 기 설계되어 시공중에 있는 호남고속철도 상에 향후Test-Bed를 구축함에 있어 기존의 설계하중보다 큰 전철주 하중(수직/수평/모멘트 하중 증가)이 작용하는 경우에 대하여 기존 상부구조물과 전철주 기초의 안전성을 검토하였다. 대상구조물은 PSC박스거더교, 소수주형 강합성교, 강아치교, Extradosed교이다. 또한 전철주와 구조물간의 인터페이스부분에 대한 안전성과 장력주지선이 교량상에 존재할 때 가장 극한조건으로 상부구조물의 안전성을 검토하였다. 전철주 하중 증가에 의한 구조물 안전성 검토 결과 현재 시공중에 있는 상부구조물은 구조안전성을 확보하고 있음을 확인하였다. In this paper, it was reviewed the safety of already designed structure and already designed catenary pole foundation based on actual increaing load than existing design load with development of 400km/h speed catenary system for building Test-Bed in 350km/h speed on construction of Honam Highspeed Railway. Superstructure types are PSC box girder bridge, 2-main girder steel composite bridge, steel arch bridge, Extradosed bridge. The loads include considered the extreme condition on acting bridge with catenary pole and its branch support load. After review of structural safety, it was confirmed the safety of superstructure and catenary pole-structure interface in spite of increasing catenary system loads.
최유복(Yu-Bok Choi),최진유(Jin-Yu Choi),박용걸(Yong-Gul Park),주환중(Hwan Joong Joo),기인도(In-DO Ki) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
It is increasing construction of long span railway bridge with concrete track system for speed up of railway and efficient maintenance of track. As the sleeper of the concrete track system layed on a bridge is fixed on deck of the bridge the displacement of the sleeper and deck is same. Therefore the spacing between two sleeper installed at the end of the adjacent deck near the expansion joint of bridge becomes vary according to the longitudinal expansion of a deck by temperature change. By the way if the spacing of sleepers become increase excessively it causes large bending stress of in a rail and it can leads failure or reduction of fatigue life of the rail. And also the excessive displacement of the rail may induce decrease ride comfort. Therefore in order to prevent such problems the allowable maximum sleeper spacing at a bridge expansion joint was mutually determined. And the determination procedure of the maximum bridge expansion length based on the allowable sleeper spacing was suggested.
장대레일 축력을 고려한 고속철도 특수교량의 변수별 분석
이종순(Jong-Soon Lee),조수익(Soo-Ik Cho),박만호(Man-Ho Park),주환중(Hwan-Joong Joo),남형모(Hyoung-Mo Nam) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Application of long-span bridge, which is affected by parameters such as span length, shoe boundary condition, track property and stiffness of superstructure and substructure etc., can vary. Especially, by CWR aspects of the axial force, that can be less constraints of construction depending on whether the application of rail expansion joint(REJ), which has disadvantaged in terms of maintenance. In this study, it was performed parameter study for multiple variables (shaft length, the upper and lower cross-section characteristics, track characteristics, etc.) in terms of CWR aspects. Structure-rail interaction analysis was applied to the typical simple span PSC Box and 3 span continuous bridge Extradosed Bridge(50m+80m+50m) excluding REJ. If you set the boundary e of variables for long-span railway bridge excluding REJ through the this study, when designing future is expected to be able to useful.
콘크리트궤도에 고속분기기 설치를 고려한 교량설계 및 시공기법
김인재(Kim In-Jae),오세영(Oh Sei-Young),주환중(Joo Hwan-Joong) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The concrete track is being used at the Phase Ⅱ of the Kyeongbu High Speed Railway and New Constructed Honam High Speed Railway. When it makes a decision of bridge type, It has to consider about longitudinal forces of Continuous Welded Rail, Displacement at the end of bridges, Up-lift forces for fastener on the track. If it is installed turnout on the bridge, There is likelihood of the deck twist by applying the each difference longitudinal forces at the 4 each rails and the buckling by concentration of rail stress at the turnout. Moreover, If it is installed turnout on the continuous bridge and REJ(Rail Expansion Joint) on the main track or turnout track. It is hard to keep a safety for rail because of coming to twist or folding at the expansion of deck on the turnout track. Therefore when it is a design of bridge with turnout. It need to take bridge type to minimize an additional axial force and a displacement at the turnout. This paper makes a study of the composite steel arch bridge that is able to resolve criteria requirements of safety for track with turnout and suggest a helpful design method for bridge considering track with turnout by being based on design and construction method of Eonyang Bridge at the north part of Ulsan Station in Phase Ⅱ of the Kyeongbu High Speed Railway.
조선규(Cho Sun-Kyu),김성일(Kim Sung-il),정철헌(Chung Chul-Hun),주환중(Joo Hwan-Joong),이흥수(Lee Heung-Su) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The appliance of the material characteristic of steel and concrete to the composite bridges is generalized in these day. As general rule, the steel plate girder bridge is the typical structure of the composite bridges, and the design codes is established. The several experimental programs regarding CFT composite section and non-CFT composite section are performed to obtain the flexure capacity and the performance of the filled-concrete in order to propose the new way of designing the composite bridge. Also, the specification of the CFT composite bridge for railway is not yet established and proposed, therefore, the concerning the specific characteristic of the CFT composite bridge, the design specification is proposed for the railway.