水利学报2017，Vol.48Issue(9)：1015-1022,8.DOI:10.13243/j.cnki.slxb.20170684
早龄期混凝土温度场分布的细观数值仿真分析
Mesoscale numerical simulation analysis for temperature distribution in early-age concrete
摘要
Abstract
The mesoscale lattice network model,in which concrete is treated as three-phase composite material consisting of coarse aggregate,mortar and interfacial transition zone (ITZ) between the aggregate and the mortar matrix,is developed to analyze heat transport process in concrete.In terms of the Galerkinmethod of Weighted Residuals and Finite Difference method,a heat conduction equation as well as its discrete form for the concrete ingredients,i.e.aggregate,mortar and ITZ,has been established assuming that mortar is the main heat source during the hydration process.A time-varying numerical simulation of the temperature distribution and the temperature fields affected by the aggregate pre-cooling and boundary conditions for early-age concrete is carried out by means of the mesoscale lattice network model,in which the thermal-chemical coupling mechanism has been taken into account.The results indicate that the mesoscale lattice network model can be effectively used to predict the adiabatic temperature rise within the early-age concrete.关键词
早龄期混凝土/细观格构网络模型/温度场/绝热温升/骨料预冷Key words
early-age concrete/mesoscale lattice network model/temperature field/adiabatic temperature rise/aggregate pre-cooling分类
建筑与水利引用本文复制引用
王立成,吴迪,鲍玖文,梁永钦..早龄期混凝土温度场分布的细观数值仿真分析[J].水利学报,2017,48(9):1015-1022,8.基金项目
国家自然科学基金面上项目(51378090) （51378090）
国家重点研究发展计划(973计划)(2015CB057701,2015CB057703) （973计划）
高性能土木工程材料国家重点实验室开放基金项目(2016CEM007) （2016CEM007）
