지반위에 놓인 콘크리트 슬래브의 온도하중 하의 컬링 거동 및 하부층 영향 실험적 분석 = Experimental Analysis of Curling Behavior of Concrete Slabs on Grade under Temperature Loading and Underlying Layers' Effects

다국어 초록 (Multilingual Abstract)

This study was conducted to analyze the curling behavior of concrete slabs on grade under temperature loading through the laboratory tests and
to investigate the effects of the support conditions of underlying layers on the curling behavior of the slab on grade systems. For the laboratory tests,
the concrete slabs were fabricated and the temperature measurement sensors were installed. The temperature loading was applied intentionally and
the time histories of the vertical displacements of the slab at several different positions were measured. One-layered underlying layers were made
using different materials and different thicknesses. Two-layered underlying layers were also made to have the same composite stiffness each other,
but the material of the upper layer was designed to be different. The experimental analysis results showed that the trend of the displacement time
histories of the slab was basically the same as that of the temperature gradient time histories. The characteristics of the curling behavior of the slab
were analyzed by separating the regions of curling up and curling down. The difference in the vertical displacements at the center and corner
decreased as the stiffness of the underlying layer became larger, and the upper layer's material of the underlying layers affected the curling behavior
of the slab.

참고문헌 (Reference)

1 Westergaard, H. M., "Stresses in Concrete Pavements Computed by Theoretical Analysis" 7 : 25-35, 1925

2 Kim, S.M., "Numerical modeling of continuously reinforced concrete pavement subjected to environmental loads" Transportation Research Board, National Research Council (1629) : 76-89, 1998

3 Nam, J.H., "Measurement and analysis of early-age concrete strains and stresses: Continuously reinforced concrete pavement under environmental loading" National Research Council (1947) : 79-90, 2006

4 Jeong, J. H., "Effect of slab curling on movement and load transfer capacity of saw-cut joints" National Research Council (1947) : 69-78, 2006

5 Jeong, J. H., "Earlyage curling and warping behavior: Insights from a fully instrumented test-slab system" National Research Council (1896) : 66-74, 2004

6 Bradbury, R, D., "Concrete Pavements" Wire Reinforcement Institute 1938