1.内蒙古工业大学 土木工程学院， 内蒙古 呼和浩特 010051;2.内蒙古工业大学 内蒙古自治区建筑检测鉴定与安全评估工程技术研究中心， 内蒙古 呼和浩特 010051;3.内蒙古工业大学 内蒙古自治区土木工程结构与力学重点实验室， 内蒙古 呼和浩特 010051
吴安利（1971—），男，内蒙古呼和浩特人，内蒙古工业大学副教授，硕士生导师，硕士. E-mail： m13948113028@163.com
吴安利（1971—），男，内蒙古呼和浩特人，内蒙古工业大学副教授，硕士生导师，硕士. E-mail： m13948113028@163.com
TU522.1
国家自然科学基金资助项目（12272190）；内蒙古自治区直属高校基本科研业务费项目（JY20220017，JY20230098）；内蒙古自治区草原英才项目
WU Anli
School of Civil Engineering， Inner Mongolia University of Technology， Hohhot 010051， China;Inner Mongolia Autonomous Region Engineering Research Center of Structure Inspection， Appraisal and Safety Assessment， Inner Mongolia University of Technology， Hohhot 010051， China;Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia， Inner Mongolia University of Technology， Hohhot 010051， ChinaHAO Yunhong
School of Civil Engineering， Inner Mongolia University of Technology， Hohhot 010051， China;Inner Mongolia Autonomous Region Engineering Research Center of Structure Inspection， Appraisal and Safety Assessment， Inner Mongolia University of Technology， Hohhot 010051， China;Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia， Inner Mongolia University of Technology， Hohhot 010051， China1.School of Civil Engineering， Inner Mongolia University of Technology， Hohhot 010051， China;2.Inner Mongolia Autonomous Region Engineering Research Center of Structure Inspection， Appraisal and Safety Assessment， Inner Mongolia University of Technology， Hohhot 010051， China;3.Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia， Inner Mongolia University of Technology， Hohhot 010051， China
研究了冻融循环作用下青砖的表观形貌、质量损失率、相对动弹性模量、抗压强度及孔结构的变化规律，并结合分形理论建立了分形维数与抗压强度、孔隙率及抗冻性能的关系.结果表明：随着经历冻融循环次数的增加，青砖表面的小孔劣化为大孔，然后逐渐延伸形成裂缝，导致质量损失率不断增加，相对动弹性模量和抗压强度均呈下降趋势；经历冻融循环后青砖内部孔具有明显的分形特征，其分形维数在2.964 2~2.982 7之间；经历冻融循环后青砖的分形维数与抗压强度呈正相关，与孔隙率呈负相关，与抗冻性能具有高度的相关性；分形维数可用于评价青砖微观孔结构的变化，也可以反映经历冻融循环后孔结构对青砖宏观性能的影响；研究结果可以为寒冷地区古建筑青砖的保护及耐久性损伤研究提供理论依据.
The apparent morphology， mass loss rate， relative dynamic elastic modulus， compressive strength and pore structure of blue bricks after freeze-thaw cycle were studied. The relationship between fractal dimension and compressive strength， porosity and frost resistance was established based on fractal theory. The results show that with the increase of freeze-thaw cycles， the small pores on the surface of the blue brick deteriorate into large pores and gradually extend into cracks， resulting in an increase in the mass loss rate， and a decrease in the relative dynamic elastic modulus and compressive strength. After freeze-thaw cycle， the internal pores of the blue brick have obvious fractal characteristics， and the fractal dimension is distributed between 2.964 2 and 2.982 7. The fractal dimension of blue brick after freeze-thaw cycle is positively correlated to compressive strength and negatively correlated to porosity， and its fractal dimension is also highly correlated with frost resistance. The fractal dimension can be used to evaluate the microscopic pore structure change of the blue brick， and can also reflect the influence of the complexity of the pore structure on the macroscopic properties of the blue brick after freeze-thaw cycle. The research results provide a basis for the protection and durability damage of ancient architectural blue bricks in cold regions.
吴安利,刘坤,郝贠洪,吴日根,宣姣羽.基于分形理论的古建筑青砖冻融损伤研究[J].建筑材料学报,2024,27(8):701-710
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