基于Matlab的混凝土平面温度自应力差分解法  

Difference Algorithm for Self-restrained Plane Thermal Stress of Concrete Based on Matlab

作　　者：李国兴 

机构地区：[1]河南省水利第二工程局,河南郑州450016

出　　处：《水电能源科学》2016年第4期78-81,27,共5页Water Resources and Power

摘　　要：针对传统的混凝土温度应力计算方法存在的不足,采用基于Matlab的混凝土平面温度自应力的差分解法,对大体积混凝土平面温度自应力进行仿真计算,即依据混凝土热传导方程及其边界控制条件,在构建混凝土平面温度场求解模型的基础上,考虑温度自应力的计算模型,建立温度自应力的差分计算格式,利用Matlab的编程与可视化功能,对工程实例中的大体积混凝土温度自应力进行仿真计算,并与有限元计算结果进行比较。结果表明,该算法计算结果与有限元计算结果一致,精度可满足工程需要,且可对温度场及温度自应力进行可视化的实时输出,为大体积混凝土施工与仿真计算提供了参考。Aiming at the shortage of traditional method for calculating temperature self-restrained stress,the plane temperature self-restrained stress of mass concrete is simulated by difference algorithm based Matlab.According to the heat conduction equation and boundary control condition,the difference algorithm of temperature self-restrained stress of concrete is built based on the solving model of plane thermal field.The function of program and visualization about Matlab is adopted to calculate the temperature self-restrained stress in real projects.Compared with the finite element method,it shows that the accuracy of results by difference algorithm can satisfy the requirement of project;furthermore,the visualization of temperature field and temperature self-restrained stress can be output in real time.The results can provide reference for the construction and simulation calculation of large volume concrete.

关 键 词：大体积混凝土 MATLAB 平面状态 差分解法 温度自应力 

分 类 号：TV315[水利工程—水工结构工程]