某船闸底板大体积粉煤灰混凝土原型观测及参数反分析

在大体积粉煤灰混凝土施工期各浇筑层埋设温度计,对混凝土内部各处的水化热温升变化情况进行原型观测。对观测数据进行整理、分析,用反分析方法推算结构的热力学参数,再利用该参数对结构进行三维数值计算分析。结果表明:原型观测反映出了混凝土各部分温度的变化规律,实测值与反分析后重新仿真的计算值均比较接近,因此,利用原型观测值,通过三维传热模型结合遗传算法的手段求解大体积混凝土热力学参数的方法是可行的。

Prototype observation and analysis of parameters of a floor of lock which is large volume of fly ash concrete

In large volume fly ash concrete during the construction of the casting layer embedding thermometer, changes of concrete hydration heat temperature rise in all parts of the internal prototype observation. Sorting, analysis are carried out on the observed data. The thermodynamic parameters are discussed by the inversion analysis, then three-dimensional numerical analysis on the structure is discussed using the parameters. The results show that the prototype observation reflects the change rule of concrete temperature of each part, the measured values is similar to the analysis to the simulation of the calculated results is similar to. By means of three dimensional heat transfer model combined with genetic algorithm to solve the mass concrete of thermodynamic parameters method is feasible.