온도에 의한 고속선 교량의 신축변위 거동 분석 = A behavioral analysis of longitudinal displacement due to temperature change in Gyeongbu High Speed Railway bridges

다국어 초록 (Multilingual Abstract)

The amount of longitudinal displacement of a ballasted track bridge is affected by temperature as well as span length of bridge, axial force of continuous welded rail, fastening force of rail fastening device and type of shoe, etc. This longitudinal displacement of a bridge changes the density of ballast at the end of a bridge, and finally causes the track irregularities like longitudinal level of rail.
This study analyzes the effect of temperature on the longitudinal displacement of Gyeongbu high speed railway bridges. Among the health monitoring system in Gyeongbu high speed line, longitudinal displacement meters and thermometers have been installed in 2 prestressed box girder bridges which have different span lengths. By comparing the longitudinal displacements of these bridges with daily and long termly ambient air temperature changes from the long term measured data, the effects of temperature change on bridge expansion are analyzed and the times when maximum expansion or contraction happens are identified.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 교량상 궤도와 교량신축이음부의 영향
• 3. 고속선 구조물에 대한 계측모니터링 시스템
• 4. 교량의 온도 및 신축변위 거동분석
• 5. 결론
• 참고문헌