摘要
为了分析大体积混凝土浇筑后的水化热问题,建立了武汉火车站轨道梁的三维实体有限元模型。对其浇筑后192 h内的温度场进行计算,确定高温和高温度梯度区域,并与实测数据进行了对比。结果显示所建立的有限元模型能够较好地模拟实际混凝土温度场;混凝土内各点温度约48 h后达到峰值;各点最大温差不超过20℃;距梁端部1.5 m处竖直方向上的温度梯度最大。
A three-dimension finite element model of Wuhan railway station track beam has been built for investigating the hydration heat after mass concrete has been constructed. Some high temperatures and high temperature gradients have been obtained on the calculation of the temperature field of the mass concrete in 192 h; and we compared with data measured on site. The numerical results show that the model can simulate the actual temperature field of the concrete accurately. The highest temperature which rise inside the concrete is achieved at 48 h. The difference of temperatures between any two points is less than 20 ℃. The maximum of temperatures gradients is on the vertical direction that 1.5 m from the top of the beam.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第19期85-87,共3页
Journal of Wuhan University of Technology
关键词
大体积混凝土
水化热
温度场
mass concrete
hydration heat
temperature field
