고무차륜 경량전철 콘크리트 주행로용 접착형 차열직물의 현장 적용 및 온도 저감 성능 평가

초록

This study evaluated the field applicability and cooling performance of adhesive-type thermal insulation fabric (TIF) for mitigating summer temperature increases in concrete guideways for rubber-tired light rail transit. A field test bed was established on a light rail test track, and surface temperatures at different positions in sections with and without TIF were monitored for 15 days. Temperature variations and daily maximum surface temperatures were compared across measurement positions to characterize cooling in fabric-covered areas and the adjacent uncovered boundary. Linear regression analyses were performed to examine the relationships between temperature reduction and daily maximum ambient temperature and daily cumulative solar radiation. Differences in temperature reduction under similar meteorological conditions were also examined to assess the variability of field performance. To evaluate the implications for high-temperature management, management thresholds were applied to daily maximum surface temperatures at the top measurement position, and the number of days in each management stage was compared between sections with and without TIF. Furthermore, assuming linear elastic behavior and uniaxial restraint of thermal expansion, surface temperature reductions were converted into an equivalent thermal stress reduction index to examine the potential for mitigating thermal stress and deformation under different restraint conditions. These analyses assessed TIF cooling performance in relation to meteorological conditions, temperature management, and mechanical operation, and explored its potential as a water-free temperature management technology for concrete guideways.

키워드