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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.
진원종(Won-Jong Chin),윤혜진(Hyejin Yoon),곽종원(Jong-Won Kwark),김병석(Byung-Suk Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Dynamic response of high-speed railway bridges is important due to the possibility of resonance from continuous and repeated action of high-speed train running. The designer's decision and application affect the result of dynamic analysis significantly therefore guideline for dynamic analysis is required. On the purpose of the selection of resonable model for dynamic analysis this study investigated load distribution effect.
진원종(Won-Jong Chin),곽종원(Jong-Won Kwark),최은석(Eun-Suk Choi),강재윤(Jae-Yoon Kang),김성태(Sung-Tae Kim),윤혜진(Hye-Jin Yoon),김남식(Nam-Sik Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
This paper aims for proposed the deflection limit on vibration serviceability of high-speed railway bridges considering passenger's comfort when a train passes a railway bridge. The vertical acceleration signals of passenger cars obtained from test were compared with them from the bridge-train transfer function by riding KTX. The deflections by KTX of seven high speed railway bridges were assumed as sine and haversine wave. The deflection limit on vibration serviceability of high-speed railway bridges considering passenger's comfort when a train passes a railway bridge duration can be expanded using bridge-train transfer function and bridge comfort limit considering serviceability due to bridge vibration. And it was compared to other allowable deflection limits of railway bridge design specifications.
곽종원(Kwark Jong Won),조정래(Cho Jung Rae),진원종(Chin Won Jong),최은석(Choi Eun Suk),김병석(Kim Byung Suk) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
경부고속철도 교량은 대부분 콘크리트교량으로 2@40m와 3@25m의 박스거더교량의 대표적인 형식이다. 일부구간에서 단경간 또는 2경간 연속 50 m 2주형을 갖는 강합성교량이 건설되었다. 연행하는 차륜이 반복해서 통과하는 철도교량은 주기적인 동적하중에 의하여 공진이 발생할 수 있으며, 특히 고속전철이 통과하는 교량은 저속차량이 통과하는 일반철도보다 공진의 발생가능성이 클 뿐 아니라 고속으로 주행하는 열차의 주행안정성 확보를 위해서 엄격한 제한조건을 만족시켜야 하는 엄밀한 동적설계 조건을 갖게 된다. 그러한 조건 중에서 가속도의 제한 규정은 UIC에서 제안된 기준치로서 도상을 갖는 경우에 0.35g이하를 만족시키도록 요구하고 있다. 현재 KTX가 주행하는 교량에서는 일부구간 및 시점에서 규정치를 초과하는 값을 보이고 있는 것으로 계측되었으며, 그 원인 및 대책마련을 위한 연구를 수행하고 있다. 본 연구에서는 그러한 과도한 가속도의 원인 규명을 위한 각종 매개변수 연구와 그 해결책 마련을 위한 연구를 수행하였으며, 경제적이면서도 효과적인 진동저감 방안을 제시하고 있다.
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.