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Journal of the Korean Society of Hazard Mitigation 2013;13(5):269-276.
Published online October 31, 2013.
연속철근 콘크리트 궤도의 철근 배치에 따른 환경하중 응력 변화 분석
권종욱, 조영교, 김성민, 안석준, 최원일
Variation of Environmental Load Stresses in Continuously Reinforced Concrete Slab Track Depending on Steel Bar Arrangement
Jong-Wook Kwon, Young-Kyo Cho, Seong-Min Kim, Suk-Jun Ahn, Won-Il Choi
Abstract
This study was conducted to investigate the effects of steel bar locations in the continuously reinforced concrete slab track (CRCT) on the stress distribution and crack widths when the steel ratio was constant and the system was subjected to environmental loads. Three-dimensional finite element analysis models of CRCT were developed and the vertical temperature gradient that caused slab curling and the temperature drop were considered as environmental loads. The analysis results showed that even if the steel ratio was identical the stresses and crack widths of CRCT were affected by the steel bar arrangement.
Key Words: Continuously reinforced concrete track; Environmental load; Crack; Steel bar arrangement; Stress
요지
본 연구는 연속철근 콘크리트 슬래브 궤도(CRCT: continuously reinforced concrete slab track)가 환경하중을 받을 경우에 철근비가 동일하더라도 철근 배근 위치가 달라지면 슬래브의 응력과 균열폭에 어떠한 영향을 미치는지를 분석하기 위해 수행되었다. 분석을 위해 CRCT의 3차원 유한요소해석 모델을 구성하였으며 환경하중으로는 슬래브의 컬링을 야기하는 수직온도경사 및 온도하강을 고려하였다. 이러한 해석모델을 이용하여 CRCT의 응력 및 균열폭 변화를 분석한 결과, 철근비가 일정하더라도 철근을 어떠한 위치에 배근하느냐에 따라 슬래브의 응력 및 균열폭이 영향을 받는 것을 알 수 있었다.
핵심용어: 연속철근 콘크리트 궤도; 환경하중; 균열; 철근배치; 응력


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