TY - JOUR

T1 - 考虑高温损伤影响玻化微珠混凝土氯离子传输模拟分析

AU - Jin, Zhuoyang

AU - Li, Minghou

AU - Селютина, Нина Сергеевна

AU - Смирнов, Иван Валерьевич

AU - Liu, Yuanzhen

AU - Zhang, Yu

PY - 2025/3

Y1 - 2025/3

N2 - 【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 mechanism 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 thickness 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 considering 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 structure design and post-disaster life assessment in practical engineering.

AB - 【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 mechanism 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 thickness 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 considering 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 structure design and post-disaster life assessment in practical engineering.

KW - chloride ion transport

KW - concrete

KW - glazed hollow beads

KW - high temperature

KW - numerical simulation

KW - service life

UR - https://www.mendeley.com/catalogue/c525252a-c7b3-3f05-881e-c19fa8e77a4c/

U2 - 10.16355/j.tyut.1007-9432.20230082

DO - 10.16355/j.tyut.1007-9432.20230082

M3 - статья

VL - 56

SP - 315

EP - 326

JO - Journal of Taiyuan University of Technology

JF - Journal of Taiyuan University of Technology

SN - 1007-9432

IS - 2

ER -