大体积混凝土温度场差分算法及时序变化分析  

Analysis of Temperature Field Difference Algorithm and Time Sequence Changes in Large Volume Concrete

作　　者：易维维 YI Weiwei(Anhui Pengyuan Engineering Technology Co.,Ltd.,Hefei 230000,China)

机构地区：[1]安徽芃源工程技术有限公司,合肥230000

出　　处：《广东水利水电》2024年第10期19-23,共5页Guangdong Water Resources and Hydropower

摘　　要：大体积混凝土结构是水利工程常见的结构形式,由于混凝土结构是热的不良导体,且自身抗拉强度较低,大体积混凝土内外表面极易产生较大温差,进而产生温度应力出现裂缝。混凝土结构温度传导方程为偏微分方程,常规求解方法繁琐且适用性差,采用差分代替微分的方式进行温度传导方程求解,给出了偏微分方程和边界条件的差分求解格式。结果表明,该方法相比于常规有限元方法,在不降低求解精度的基础上,大幅度提高了求解效率。Large volume concrete structures are common structural forms in hydraulic engineering.Due to the fact that concrete structures are poor conductors of heat and have low tensile strength,large volume concrete is prone to significant temperature differences on the inner and outer surfaces,resulting in temperature stress and cracking.The temperature conduction equation of concrete structures is a partial differential equation,and conventional solving methods are cumbersome and have poor applicability.This article uses differential instead of differential to solve the temperature conduction equation,and provides a differential solution format for partial differential equations and boundary conditions.The results show that compared with conventional finite element methods,this method significantly improves the solving efficiency without reducing the solving accuracy.

关 键 词：大体积混凝土 差分算法 温度场 时序变化 

分 类 号：TV544.91[水利工程—水利水电工程]