College of Civil Engineering, Taiyuan University of Technology
Saint Petersburg State University

【目的】火灾高温引起的隧道衬砌结构开裂损伤往往会对结构耐久性维持埋下巨大隐患。【方法】基于此,通过MATLAB和COMSOL软件交互使用,建立了包含粗骨料、玻化微珠、砂浆和界面过渡区的玻化微珠混凝土(GIC)凸多边形骨料数值模型,开展了考虑高温影响的氯离子传输模拟并进行了有效性验证。依据钢筋脱钝寿命理论,建立了灾后服役寿命参数影响评价机制。【结果】结果表明:随着玻化微珠体积分数的增加、界面过渡区厚度的减小及最大骨料直径的增大,混凝土灾后服役寿命得到一定改善,其中,玻化微珠体积分数影响尤为显著。【结论】基于参数分析,通过单因素相关性分析及多元非线性分析方法,最终建立了考虑高温影响的耐久性极限状态函数,可为实际工程中建筑结构设计及灾后寿命评估提供参考。

【Purposes】The crack damage to tunnel lining structure caused by fire generally poses a significant challenge to the maintenance of its structural durability. 【Methods】To address this issue, a convex polygon aggregate numerical model of concrete with glazed hollow beads (GIC) consisting of coarse aggregate, mortar, and the interface transition zone was established through the interactive use of MATLAB and COMSOL softwares. The numerical simulation was conducted to investigate the chloride ion transport behavior considering the effect of high temperature and the model validity was then verified. According to the theory of steel reinforcement depassivation life, an evaluation mecha⁃ nism of post-disaster service life parameter impact was further established. 【Findings】The results show that with the increase of the volume fraction of glazed hollow beads, the decrease of the thick⁃ ness of interfacial transition zone, and the increase of the maximum aggregate diameter, the post- disaster residual service life is improved. Especially, the effect of glazed hollow beads is particularly significant. 【Conclusions】 According to parameter analysis, the durability limit state function consid⁃ ering the influence of high temperature is finally established through single factor correlation analysis and multivariate nonlinear analysis methods. This study could provide a reference for building struc⁃ ture design and post-disaster life assessment in practical engineering.

国家自然科学基金国际合作与交流项目(52111530039);RussianFoundationforBasicResearch(21-51-53008)

晋卓阳,李明厚,SELYUTINANina,等.考虑高温损伤影响玻化微珠混凝土氯离子传输模拟分析[J].太原理工大学学报,2025,56(2):315-326.

JIN Zhuoyang,LI Minghou,SELYUTINA Nina,et al.Chloride ion transport simulation of concrete with added glazed hollow bead considering thermal damage[J].Journal of Taiyuan University of Technoloty,2025,56(2):315-326.