文献类型：期刊文献

英文题名：Study on the causes of cracks in a reinforced concrete highway bridge

作者：Lu, Hongna Du, Can Liu, Qiumei Shen, Ruwei Xing, Lin Yang, Jingfu Xie, Anheng

通信作者：Liu, QM[1]

机构：[1]Guizhou Inst Technol, Coll Civil Engn, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Civil Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2026

卷号：65

期号：1

外文期刊名：REVIEWS ON ADVANCED MATERIALS SCIENCE

收录：;EI(收录号：20262721044172);Scopus(收录号：2-s2.0-105043618394);WOS:【SCI-EXPANDED(收录号:WOS:001808102100001)】；

基金：1. Guizhou Provincial Science and Technology Foundation (No. zk[2025]198 and No. MS[2026]249) 2. Young Researcher Program of the Science and Technology Foundation of Guizhou Province (No. QN[2025]218) 3. Natural Science Research Project of Colleges and Universities of Guizhou Provincial Department of Education (Youth Science and Technology Talent Development Project) (No. [2024]166) 4. Guizhou Institute of Technology High-Level Talent Research Start-Up Funding Project (No. 2023GCC074 and No. 2025GCC042).

语种：英文

外文关键词：reinforced concrete highway bridge (RCHB); crack width; uneven settlement; alkali-silicic reaction (ASR); microstructure analysis

摘要：Cracking in reinforced concrete highway bridges (RCHB) poses a serious threat to both structural and traffic safety. Identifying the causes of cracks is an important basis for determining subsequent treatment plans. To ascertain the causes of cracks in a reinforced concrete highway bridge, firstly, an on-site survey was conducted, including drilling concrete core samples and deploying measuring points to monitor the bridge's settlement and crack changes. Secondly, the strength and alkali-silica reaction (ASR) of the collected concrete samples were experimentally studied, and micro-morphology and composition analysis of the samples were carried out using scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Finally, based on the crack phenomena observed in the bridge's main structure, the causes of the cracks were analyzed using experimental data and microstructure observations. Combining the results of on-site monitoring and indoor tests, it was concluded that uneven settlement and low concrete strength were the primary causes of bridge cracking, while the impact of ASR could be neglected.