차세대 고속철 주행속도를 대비한 교량받침의 장기마찰시험법
A Long-Term Friction Test of Bridge Bearings Considering Running Speed of Next Generation Train
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초록
경부 고속철 40 m 단경간 PSC 교량을 대상으로 38 자유도 KTX 동력차를 주행속도 500 km/h까지 12 단계 불규칙 궤도형상과 상호작용력을 고려하여 해석하였다. 차량의 윤축하중과 중심회전각을 평가하기 위하여 170 m 일반도상을 교량과 조합하여 횡압과 탈선계수 그리고 윤중감소율을 허용기준과 비교하였다. 단순교와 연속교의 교량받침 최대 변위와 누적이동거리를 주행속도별로 해석하였다. PTFE 마찰판과 DP-mate의 EN-1337-2 기준의 장기마찰시험을 수행하였다. 수행된 장기마찰시험은 차세대 고속철의 증가되는 주행속도를 고려하여 개선방안을 제안하였다.
Abstract
Structural behaviour of PSC box bridge, on which KTX train runs, is analysed up to 500 km/h speed considering 12 stages track irregularityand interaction between bridge and vehicle. To evaluate wheel forces and rotations of vehicle, lateral wheel forces, derail factor and offload factorcalculated on the track combining the bridge and 170 m normal track are compared with existing allowed limits. Maximum longitudinal displacementand accumulated sliding distance of the brige bearings for simply supported and 2 span continuous PSC bridges are presented by each running speeds. Long-term friction tests based on EN-1337-2 are conducted between PTFE and DP-mate plates. Finally, the long-term friction tests are proposedto consider the increasing speed of next generation high-speed train.
참고문헌 (6)
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- 오순택, "PSC 교량 위를 고속주행 중인 KTX 전동차의 윤하중 동적해석", 한국방재학회논문집, 13(5), pp.277~283 (2013), 한국방재학회
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