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Title |
Analysis of Expansion Joint Design Standards Considering Domestic Temperature Characteristics
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Authors |
이강연(Kang-Yeon Lee) ; 박경욱(Gyeonguk Park) ; 김용완(Yong-Wan Kim) ; 안진희(Jin-Hee Ahn) |
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DOI |
https://doi.org/10.11112/jksmi.2026.30.5.140 |
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Keywords |
신축 이동량; 설계 온도범위; 유효교량온도; 동결일수; 초과확률 Expansion movement; Design temperature range; Effective bridge temperature; Freezing day; Exceedance probability |
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Abstract |
This study quantitatively evaluated the exceedance probabilities of the design temperature ranges specified in KDS 24 12 21 using long-term meteorological observation data from Korea. Regions were classified as common or cold based on the number of freezing days, and the normality of the annual temperature ranges, calculated as the differences between annual maximum and minimum air temperatures, was assessed using Q-Q plots and the Shapiro-Wilk test. After the normal, Gumbel, and generalized extreme value (GEV) distributions were compared using the Akaike information criterion (AIC), the Bayesian information criterion (BIC), and tail sensitivity at the 97th and 99th percentiles, the exceedance probabilities were estimated for each region and bridge type based on the normal distribution. To facilitate practical interpretation of the results, the temperature ranges were converted into expansion movements; because the same conversion equation was applied to both the observed and the design temperature ranges, the exceedance probabilities based on expansion movements and those based on temperature ranges were identical. In addition, an analysis based on the effective bridge temperature was conducted to account for differences between air and bridge temperatures. Most regions, except Jeju and parts of the southern coast, exhibited cold-region characteristics, and the exceedance probabilities of the design temperature ranges varied considerably across regions and bridge types. Under the air-temperature basis, the differences in exceedance probability between concrete and steel bridges were primarily attributable to the differences in their design temperature ranges, whereas the relative trends between the two bridge types changed when the effective bridge temperature was applied. These results confirmed the need to consider analyses based on bridge temperature measurement data when evaluating the adequacy of the design temperature ranges.
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