국내 지역별 온도계측 자료에 기반한 교량 설계기준 온도의 적정성 평가

초록

In this study, regional temperature variations were quantitatively analyzed utilizing long-term meteorological data collected nationwide and from 68 selected regions in Korea over the past five decades, spanning from 1973 to 2024. The analysis employed both national and regional datasets provided by the Korea Meteorological Administration. Subsequently, the temperature design loads required for the design of bridge bearings and expansion joints were compared with the current bridge temperature design standards, with the aim of assessing appropriate temperature design loads that duly consider the effects of climate change. The analysis of long-term temperature records revealed a general upward trend in the annual mean, maximum, and minimum temperatures across the country, with the increase in minimum temperatures being particularly pronounced. Extreme temperature values were estimated for 30-, 50-, and 100-year return periods using probabilistic models. In certain regions, the predicted extreme temperatures for the 100-year return period exceeded the current design standards for Normal-climate steel bridges by 1.4% when temperature loads were not applied. When temperature loads were considered, the exceedance amounted to 1.4% for Normal-climate composite bridges and 2.4% for cold-climate composite bridges. These findings underscore the necessity for a more refined and regionally differentiated approach to bridge temperature design standards, one that reflects both local characteristics and anticipated future temperature variability. Such revisions are expected to contribute significantly to ensuring the structural safety and durability of bridges in the era of climate change.

키워드