摘要
以东西轴线沱江大桥塔座大体积混凝土为研究对象,对距结构底面0.5、1、1.5、2 m位置处的平面温度场进行监测,对比分析了温度场实测值与有限元数值模拟分析结果,得到以下结论:(1)大体积混凝土最高温度在不同平面上均呈现出先快速增长、后缓慢平稳降低的趋势,塔座内各温度场监测平面的混凝土最高温度约为60℃;(2)冷却水管布设位置对其降温效果影响较大,越靠近结构边缘,其短时间内的温控效果越明显,靠近结构体中心位置,结构体峰值温度变化越平稳;(3)数值模拟结果能够在一定程度上反映大体积混凝土温度场变化趋势,但其峰值温差滞后约52 h,温差曲线实测与模拟最小误差为0.6%。
Taking the large volume concrete of the tower base of the Tuojiang Bridge on the east-west axis as the research object,the planar temperature fields at positions 0.5,1,1.5,and 2 m away from the bottom surface of the structure were monitored.The measured values of the temperature field and the results of the finite element numerical simulation analysis were compared and analyzed,and the following conclusions were obtained:(1)The maximum temperature of mass concrete on different planes showed a trend of rapid growth at first,and then a slow and steady decrease,and the maximum temperature of concrete on each temperature field monitoring plane in the tower was about 60℃;(2)The location of the cooling water pipe has a great influence on its cooling effect.The closer the location is to the edge of the structure,the more obvious the temperature control effect is in a short time.The closer the location is to the center of the structure,the more stable the peak temperature change of the structure;(3)The numerical simulation results can reflect the variation trend of mass concrete temperature field to a certain extent,but the peak temperature difference lags about 52 h,and the minimum error between measured and simulated temperature difference curve is 0.6%.
作者
周星宇
周良均
ZHOU Xingyu;ZHOU Liangjun(Chengdu construction Rong Rui building materials Co.,LTD.,Chengdu,Sichuan 610000,China)
出处
《黑龙江交通科技》
2025年第12期52-56,共5页
Communications Science and Technology Heilongjiang
关键词
大体积混凝土
冷却水管
温控措施
温度监测
数值模拟
mass concrete
cooling water pipe
temperature control measures
temperature monitoring
numerical simulation
