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Journal of the Korean Society of Hazard Mitigation 2015;15(6):65-71.
Published online December 30, 2015.
온도하중을 고려한 궤도-교량 종방향 상호작용 응답 분석
권오혁, 윤경민, 박범호, 전병흔, 임남형
Track-bridge Longitudinal Interaction Response Analysis Considering the Variation of Temperature
Oh hyuk Kwon, Kyung min Yun, Beom ho Park, Byeong heun Jeon, Nam hyoung Lim
Abstract
When a continuous welded rail(CWR) track is supported by bridge, additional axial stress and displacement are occurred by trackbridge interaction, and they have an effect on safety and serviceability of track. Domestic and foreign standards for track-bridge interaction offer analysis methods and limit values which are guiding the safety design, because the influence on interaction is difficult to be evaluated quantitatively. In this study, measurement system was constructed on the concrete a track supported by a bridge, and field monitoring has been carried out to evaluate the influence on track-bridge interaction by temperature changes. And track-bridge interaction responses under various temperatures were analyzed by comparing results of measurement and numerical analysis.
Key Words: Track-bridge interaction; Field monitoring; Variation of temperature; Additional stress of rail
요지
교량 상 장대레일 부설 시 궤도와 교량의 상호작용에 의하여 부가축응력 및 변위가 발생하며, 이는 궤도의 안전성 및 사용성에 영향을 미친다. 국내외의 기준에서 교량 설계 시 궤도-교량 상호작용 해석기법 및 제한 값을 제시하고 있으나, 상호작용에 의한 영향을 정량적으로 평가하는 것은 매우 어려워 안전측 설계를 사용하고 있는 실정이다. 본 연구에서는 온도 변화에 따른 궤도-교량 상호작용 영향을 분석하기 위하여 교량 상 콘크리트궤도에 계측시스템을 시공하였으며 현장계측을 수행하였다. 또한 계측 결과와 수치해석 결과를 비교하여 온도변화에 따른 궤도-교량 상호작용 응답을 분석하였다.
핵심용어: 궤도-교량 상호작용; 현장계측; 온도 변화; 장대레일; 부가축응력
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