混凝土早龄期温度场测试与数值模拟分析

通过数值模拟与现场测试相结合的方式分析了某混凝土振动台基础在早龄期温度场的分布特性, 获得了混凝土的不同位置内外温差和内表温差的变化规律.数值和测试结果表明, 混凝土不同测试点的温度变化规律各异, 靠近顶部点容易受到蓄水区的影响而出现与外界大气温度变化一致的规律, 中部和底部测点则受其影响较小.中部和底部温度及温差在数值模拟和现场记录比较中具有良好的一致性, 且温差都在25℃以内, 混凝土不会开裂.

Analysis of Concrete Temperature in Early Age With Field Test and Numerical Simulation Methods

This research revealed the temperature field characteristics of a concrete foundation slab in early age based on the numerical simulation and field test methods, the concrete inner-surface temperature differences and the inner-outer temperature differences variation rule with the curing time was attained. The numerical and test results show that the temperature curves of the monitoring points follow different laws with the concrete curing age. The temperature of top points, which is located in the vicinity of the reservoir area, is affected obviously by the outer conditions, and the temperatures curves is consist with the atmospheric temperature, but the center and bottom points are affected little. It shows a good consistency between numerical simulation and field test records concerning the temperature and the temperature difference of the measuring points located at the center and the bottom of the concrete, and the temperature difference are all less than 25 ℃, and the concrete would not crack.