筏板基础大体积混凝土放热温度场数值模拟研究  

Numerical simulation research on heat release temperature field of raft foundation mass concrete

作　　者：陆汝林 吴炎 李荟楠 胡坤 LU Rulin;WU Yan;LI Huinan;HU Kun(CCCC Third Navigation Engineering Survey and Design Institute Co.,Ltd.,Shanghai 200032,China;Changzhou University Huaide College,Taizhou 214500,China;School of Environmental and Safety Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032 [2]常州大学怀德学院,江苏泰州214500 [3]常州大学环境与安全工程学院,江苏常州213164

出　　处：《混凝土》2024年第2期188-192,共5页Concrete

基　　金：中国博士后科学基金面上资助项目(2021M703507);江苏省产学研合作项目(BY2021208);泰州市科技支撑计划(社会发展)项目(SSF20210062)。

摘　　要：通过有限元分析软件模拟了下大体积混凝土内部的温度场,分析了不同环境温度的取值方法对混凝土温度场的影响并采用现场监测数据验证了模拟结果的正确性,最后改变外界环境温度的变化和混凝土保温层的厚度来研究混凝土内部温度场的变化。研究结果表明:外界温度采用正弦函数模拟混凝土的温度场比采用平均温度模拟更贴近实际,正弦函数模拟值与实测值的误差可以控制在12%以内。外界环境温度降低会使得混凝土温度场的最大值与最小值降低,最大值降低幅度忽略不计,外界平均温度为18℃是混凝土内部温差25℃的分界点。混凝土上部保温层会降低混凝土温度场中的温度及最大温差,但是当保温层达到0.8 mm时会使得温度场温度和最大温差急剧增加。The internal temperature field of mass concrete was simulated by finite element analysis software.The influence of different ambient temperature on concrete temperature field was analyzed.The correctness of the simulation results was verified by field monitoring data.The change of internal temperature field of concrete was studied by changing the change of external environment temperature and the thickness of concrete insulation layer.The results showed that the simulation of concrete temperature field with sine function was more practical than that with average temperature.The error between the simulated value and the measured value of sine function could be controlled within 12%.The decrease of the external ambient temperature would reduce the maximum and minimum values of the concrete temperature field,and the maximum reduction range was ignored.The external average temperature of 18℃was the dividing point of the concrete internal temperature difference of 25℃.The upper insulation layer of concrete would reduce the temperature in the concrete temperature field and the maximum temperature difference.When the insulation layer reached 0.8 mm,the temperature field and the maximum temperature difference would increase sharply.

关 键 词：大体积混凝土 温度场 温度函数 保温层厚度 

分 类 号：TU528.01[建筑科学—建筑技术科学]