温度变化对砖砌筑城墙开裂影响的研究——以南京城墙为例  

Study on the Effect of Temperature Change on the Cracking of Brick-built City Walls——Taking Nanjing City Wall as an Example

作　　者：王天文 张琪 王南南 WANG Tian-wen;ZHANG Qi;WANG Nan-nan(Nanjing City Wall Protection and Management Center,Nanjing City Wall Research Association,Nanjing Jiangsu210037 China)

机构地区：[1]南京城墙保护管理中心、南京城墙研究会,江苏南京210037

出　　处：《江苏建筑》2022年第5期80-83,共4页Jiangsu Construction

摘　　要：南京城墙作为国家重点文物保护单位,对其典型病害的破坏机理进行分析尤为重要。其中,温度变化引起的温度应力对城墙开裂影响较大,进而导致雨水渗透等病害。由于年代久远,城墙粘结材料发生不同程度的劣化,文章将其分为3个强度等级,即M0.4、M1和M2.5,并引入损伤因子,通过ABAQUS模拟砖砌筑城墙在温度变化下的开裂影响;考虑了月平均气温变化和历史最大温差两种工况。模拟结果表明:在月平均气温变化下,M0.4强度等级的城墙会发生裂缝;在最大历史温差下,3个强度等级的城墙都会发生裂缝,但裂缝出现的部位有所差异。As a national key cultural relic protection unit,it is particularly important to analyze the damage mechanism of typical diseases of Nanjing City Wall.Among them,the temperature stress caused by temperature changes has a greater impact on the cracking of the city wall,which in turn leads to rainwater infiltration and other diseases.Due to the age,the city wall bonding material has deteriorated to different degrees.In this paper,it is divided into three strength levels,namely M0.4,M1 and M2.5,and the damage factor is introduced to simulate the cracking effect of the brick-built city wall under the temperature change through ABAQUS.Two working conditions,the monthly average temperature change and the historical maximum temperature difference,are considered.The simulation results show that under the monthly average temperature change,cracks will occur in the city walls of the M0.4 intensity level;under the maximum historical temperature difference,cracks will occur in the city walls of the three intensity levels,but the cracks appear in different locations.

关 键 词：南京城墙 砖砌体 温度应力 数值模拟 裂缝 

分 类 号：TU502.4[建筑科学—建筑技术科学]