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

IF 10.1 1区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
Tiejun Liu , Ming Zhang , Dujian Zou , Jiaping Liu , Jinping Ou
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引用次数: 0

Abstract

Concerns about the durability of transportation infrastructure due to freeze–thaw (F–T) cycles are particularly 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 structures 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 interpolation 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.
考虑时空气候特征的中国高原地区冻融作用分析与区划
冻融循环对交通基础设施耐久性的影响在中国高原地区尤为显著,混凝土的老化和性能退化对该地区构成了巨大挑战。现行的混凝土结构抗冻设计国家标准主要基于最冷月平均温度,并没有充分考虑冻融循环的时空变化、振幅和频率的综合影响。针对这一问题,本研究引入了时空分布模型,通过统计分析和空间插值技术分析 F-T 作用对混凝土结构的长期影响。应用聚类分析法,根据冻结温度、温差和 F-T 周期次数等数据,建立了全国范围内的 F-T 作用水平分区。此外,这项研究还利用水压和累积损伤理论,探讨了自然环境条件与实验室加速试验之间的相似性。研究设计了一个可视化平台,其中包含气象数据查询、环境特征分析和 F-T 作用相似性计算工具。这项研究为评估中国高原地区混凝土结构的使用寿命和加强其定量耐久性设计奠定了理论基础,提供了技术指导。
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来源期刊
Engineering
Engineering Environmental Science-Environmental Engineering
自引率
1.60%
发文量
335
审稿时长
35 days
期刊介绍: Engineering, an international open-access journal initiated by the Chinese Academy of Engineering (CAE) in 2015, serves as a distinguished platform for disseminating cutting-edge advancements in engineering R&D, sharing major research outputs, and highlighting key achievements worldwide. The journal's objectives encompass reporting progress in engineering science, fostering discussions on hot topics, addressing areas of interest, challenges, and prospects in engineering development, while considering human and environmental well-being and ethics in engineering. It aims to inspire breakthroughs and innovations with profound economic and social significance, propelling them to advanced international standards and transforming them into a new productive force. Ultimately, this endeavor seeks to bring about positive changes globally, benefit humanity, and shape a new future.
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