http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
곽종원(Kwark Jong Won),진원종(Chin Won Jong),최은석(Choi Eun Suk),강재윤(Kang Jae Yoon),김병석(Kim Byung Suk) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
A study has been performed to investigate on the dynamic behavior of bridges crossed by the KTX(Korea Train express). The investigated bridge is a 2-span continuous concrete box bridge with spans of 40 m length named Yeon-Jae bridge. We have performed many field tests on the dynamic behaviors of a real bridge for KTX using various sensors. For this study, various sensors have been installed on the Yeon- ]ae bridge located in the experimental section of the KHSR(Korea High-Speed Railway) track and tests have been performed. Through this study, it is known that effects of local modes and sleepers in the box-girder bridge for the KTX on the dynamic responses is remarkable. Therefore, in the investigation on the accelerations of the box-girder bridge, three dimensional model should be adopted in numerical analysis including the effects of sleepers. The effect of temperature on the accelerations of the bridge should be investigated in the further studies to determine the reason of excessive acceleration.
곽종원(Kwark Jong Won),진원종(Chin Won Jong),조선규(Cho Sun Kyu),김성일(Kim Sung Il),이흥수(Le Heung Su) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Concrete filled tube(CFT) which has various merits of good loading capacity, excellent deformable performance, reduced noise and vibration generation has conveniencies and economical aspects in design and construction for bridges. A real scale test on the model bridge with CFT girder was performed to evaluate applicability to railway bridges through checking on vibration efficiency. Major factors which give rise to vibration of railway bridge are crossing trains, working machines, earthquake, and wind. Check on the bridge vibration induced by crossing trains is very important to ensure riding performance of them. Dynamic capacity as well as bearing capacity and workability of CFT girder is necessary to guarantee applicability to railway bridge. In this study, a real scale bridge model was made in structural laboratory and various tests on dynamic characteristics(dynamic elastic modulus, damping ratio, natural frequencies, and mode shapes) was performed. In addition to this, simulation tests on crossing trains using dynamic actuators were performed and various responses(vertical displacements, accelerations, end-rotations of the model) were measured. From the result of this study, it is verified that the bridge with CFT girders may have sufficient dynamic performance for railway bridge.
튜브형 수중교량의 열차-교량 상호작용해석을 통한 공진현상 분석
곽종원(Jong-Won Kwark),민동주(Dong-Ju Min),김문영(Moon-Young Kim) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10
이 연구에서는 튜브형 수중교량을 통과하는 열차시스템의 구조물-차량 상호작용 해석법을 개발하고, 동적거동특성을 조사하고자 한다. 유체의 영향을 고려하기 위하여 부가질량개념을 도입하고, 또한 수중교량의 진동모우드 중첩법에 기초한 차량-교량구조물의 동적 상호작용해석방법을 적용한다. 상용프로그램인 ABAQUS를 이용하여 수중교량을 모델링하여 진동모우드를 추출하였으며, KTX차량 주행시의 동적 상호작용해석을 실시하여 수중교량 및 열차의 동적 거동을 파악한다. 수중교량과 같이 저주파의 특성이 지배적인 교량에서는 저속에서 공진에 의한 응답값의 확대를 관찰할 수 있었으며, 부력에 의한 솟음이 열차와의 상호작용을 통해 교량 및 차량에 공진을 유발하므로 이에 대한 대비가 필요한 것으로 판단된다. This study intends to develop an algorithm for the dynamic interaction analysis of submerged floating tunnel and vehicles. A tension leg submerged floating tunnel is selected and modeled by the commercial FEM program ABAQUS to investigate its modal characteristics and conduct the dynamic interaction analysis. The added mass concept is applied to represent the inertial force by a fluid, and then dynamic interaction analyses are conducted with superposition method when the KTX moves along the submerged floating tunnel. From the result, the resonance phenomenon is observed under specific conditions and so countermeasures are required to cancel out the resonance phenomenon.
경부고속철도 교량의 과도한 가속도의 저감방안에 대한 연구
곽종원(Kwark Jong-Won),진원종(Chin Won-Jong),최은석(Choi Eun-Suk),조정래(Cho Jeong-Rae),이정우(Lee Jung-Woo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
When Korean High Speed Train (KTX) runs over a high-speed railway bridge, the high-speed railway bridge gives quite large acceleration response. Local vibration at the large cross section, the impact from equally spaced sleepers, the vibration due to elastomeric bearings, and the vibration from the train itself are the causes of this acceleration response. Maximum peaks of the accelerations measured at the bridges are sometimes going over the limit value. Although it is smaller than 0.35G, the limit from the Korean Bridge Design Manual(BRDM), this acceleration response should be reduced for the safety of running trains with high speed. In this paper, to reduce the acceleration response by controlling excessive local vibration at the large cross section, vibration reduction method is studied. The result shows that the effect of elastomeric bearings on the vibration of the bridge is very large and that the vibration reduction device is effective against wing mode local vibration PSC box girder bridge for the high-speed railway, which usually has very large cross section, although it has little effect on global vibration modes such as flexural and twisting modes. The test of the vibration reduction device on the bridge in service has been performed in this study.