Analysis and Zonation of Freeze–Thaw Action in the Chinese Plateau Region Considering Spatiotemporal Climate Characteristics  

作　　者：Tiejun Liu Ming Zhang Dujian Zou Jiaping Liu Jinping Ou 

机构地区：[1]School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [2]Guangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [3]School of Materials Science and Engineering,Southeast University,Nanjing 211189,China

出　　处：《Engineering》2024年第11期308-325,共18页工程（英文）

基　　金：supported by the National Key Research and Development Program of China(2021YFF0500801);the Joint Funds of the National Natural Science Foundation of China(U23A20658);the National Natural of China(52025081).

摘　　要：Concerns about the durability of transportation infrastructure due to freeze-thaw(F-T)cycles are particu-larly significant in the Chinese plateau region,where concrete aging and performance deterioration pose substantial challenges.The current national standards for the frost resistance design of concrete struc-tures are based predominantly on the coldest monthly average temperature and do not adequately address the comprehensive effects of the spatiotemporal variance,amplitude,and frequency of F-T cycles.To address this issue,this study introduced a spatiotemporal distribution model to analyze the long-term impact of F-T action on concrete structures by employing statistical analysis and spatial inter-polation techniques.Cluster analysis was applied to create a nationwide zonation of F-T action level from data on the freezing temperature,temperature difference,and the number of F-T cycles.Furthermore,this study explored the similarity between natural environmental conditions and laboratory-accelerated tests using hydraulic pressure and cumulative damage theories.A visualization platform that incorporates tools for meteorological data queries,environmental characteristic analyses,and F-T action similarity calculations was designed.This research lays theoretical groundwork and provides technical guidance for assessing service life and enhancing the quantitative durability design of concrete structures in the Chinese plateau region.

关 键 词：Concrete durability Freeze-thaw(F-T) Environmental characteristics SIMILARITY ZONATION 

分 类 号：TU528[建筑科学—建筑技术科学]