土木工程与管理学报2026，Vol.43Issue(1)：17-24,8.DOI:10.13579/j.cnki.2095-0985.2026.20250316
箱梁大体积混凝土水化热效应与开裂风险分析
Analysis of Hydration Heat Effect and Cracking Risk in Mass Concrete of Box Girder
摘要
Abstract
The thermal effect resulting from hydration heat is the primary cause of cracking in mass concrete for box girder during construction.To thoroughly investigate the time-dependent thermal effect and cracking risk of mass concrete in box girder during the hydration reaction process,this study conducted systematic temperature monitoring of the mass concrete in the Segment No.0 by em-bedding temperature sensors within the box girder structure.By integrating the temperature monitoring data with finite element simulation results,the temperature rise curves,temperature difference curves,and spatial distribution characteristics of the temperature field at critical measurement points within the mass concrete of the box girder were obtained.The results indicated that the temperature of the mass concrete in the box girder peaked at 79.5 ℃ at 60 hours after pouring,with the maximum temperature differences in the longitudinal,transverse,and vertical directions of the bridge being 44.1 ℃,41.7 ℃,and 44.7 ℃,respectively.Finally,based on the measured data and finite element simulation results,a calculation formula for vertical temperature difference distribution and a hydra-tion-induced thermal damage computation model were developed for mass concrete box girders.The findings of this study provide a valuable reference for assessing hydration heat effects and cracking risks in similar mass concrete box girders.关键词
单箱三室箱梁/大体积混凝土/水化热/温度损伤/开裂风险评估Key words
single-cell triple-chamber box girder/mass concrete/hydration heat/temperature dam-age/cracking risk assessment分类
建筑与水利引用本文复制引用
徐长武,毛威,郭鹏,李小青,曹玉贵..箱梁大体积混凝土水化热效应与开裂风险分析[J].土木工程与管理学报,2026,43(1):17-24,8.基金项目
国家自然科学基金(52378158) （52378158）
