【摘要】 根据武汉协和医院外科大楼工程实例 ,建立了高层建筑基础大体积砼温度场与土壤温度场相互影响的非稳态耦合温度场模型 ,以精确计算砼的绝热温升。采用一维非稳定耦合传热方程组来描述基础大体积砼的传热过程。用L aplace变换把耦合方程组化为易解的常微分方程组 ,用 Stehfest算法进行数值反演 ,编制 Matlab程序计算出砼内各点在各时刻的温度。结果表明 :由模型所计算出的理论值与现场实测值相当吻合 ,为高层建筑基础大体积砼绝热温升计算和施工过程中温度控制提供了理论依据。对解决其它一维热传导耦合问题具有一定的参考价值更多还原

【Abstract】 Based on actual situation of Surgery Building of Xiehe Hospital, unstable coupled temperature field model was established to calculate accurately adiabatic temperature changes of concrete with full considerations of interaction between two temperature fields, mass concrete of foundation in high rise building and soil in this paper. One dimension unstable coupled heat conduction equations were used to describe diathermanous process of mass concrete of foundation, which were turned into the ordinary differential ones whose solution can be obtained easily by Laplace transform techniques. In the terms the method of numerical inversion of Laplace transform by Stehfest, Matlab program was developed to calculate temperature changes from interior points of concrete at any time. The results showed that the theoretic values by the model were in consistence with test ones very well. The theoretic basis was presented for calculating adiabatic temperature changes and controlling temperature during construction of mass concrete of foundation in high rise building. At the same time, the analysis idea about unstable coupled temperature field is helpful for the solution to other one dimension heat conduction.更多还原