[1]刘玉峻,钱春香,庄园,等.二维散热条件对混凝土内部温度梯度及热传输的影响[J].东南大学学报(自然科学版),2011,41(4):820-823.[doi:10.3969/j.issn.1001-0505.2011.04.031]
 Liu Yujun,Qian Chunxiang,Zhuang Yuan,et al.Influence of two-dimensional cooling condition on inner temperature gradient and heat transferring in concrete[J].Journal of Southeast University (Natural Science Edition),2011,41(4):820-823.[doi:10.3969/j.issn.1001-0505.2011.04.031]
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二维散热条件对混凝土内部温度梯度及热传输的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第4期
页码:
820-823
栏目:
材料科学与工程
出版日期:
2011-07-20

文章信息/Info

Title:
Influence of two-dimensional cooling condition on inner temperature gradient and heat transferring in concrete
作者:
刘玉峻钱春香庄园高桂波
(东南大学材料科学与工程学院,南京211189)(东南大学江苏省土木工程材料重点实验室,南京211189)
Author(s):
Liu YujunQian ChunxiangZhuang YuanGao Guibo
(School of Materials Science and Engineering, Southeast University, Nanjing 211189, China)
(Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China)
关键词:
混凝土温度梯度温度应力二维散热
Keywords:
concrete temperature gradient temperature stress two-dimensional heat radiating
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2011.04.031
摘要:
为了获得二维散热条件下混凝土内部的温度分布情况,采用埋入温度传感器的方法,从水化温度峰值开始测量了混凝土试件内部不同位置的温度变化.结果表明,二维散热条件下,混凝土内部温度受到2个方向上的散热影响.越接近试件表面的位置,其温度随时间的增加下降得越快,产生的温度梯度越大,因此造成温度应力更大; 在快速降温阶段,即从终凝到60 h之间,降温速度快,温度应力大; 试件内部的热传递速率大于近表面位置热量传递到表面并散失到环境中的速率; 近表面的位置早期温度梯度可达80 ℃/m左右,内部温度梯度也能达到50 ℃/m左右.由表面散热情况对混凝土内部温度变化的影响,可以预测同样散热条件下混凝土试件中不同位置的温度以及内外的温度梯度,为防止裂缝发生寻找相应措施.
Abstract:
In order to know the internal temperature distribution under two-dimensional heat radiating, the temperatures and their changes were measured from the peak hydration temperature within different positions in concrete specimen by embedding temperature sensors. Results show that under the condition of two-dimensional heat radiating, inner temperatures in concrete are affected by two directions. As coming close to the surface the temperature declines faster with time, which results in greater temperature differences between inside and outside. Consequently, greater temperature gradient and temperature stress are formed. In rapid cooling stage, i. e. from final set to 60 hours, the concrete cools down faster, which causes greater temperature stress. Under the condition of two-dimensional heat radiating, the interior heat transfer rate is bigger than that in near surface zone to transfer heat to the surface and the environment. In near surface zone at early stage, the temperature gradient could reach 80 ℃/m, while the internal temperature gradient is about 50 ℃/m. With the effects of surface heat dissipation, the temperate and temperate gradient at different locations of concrete under the same cooling conditions can be predicted. This can be used to find appropriate measures to prevent the occurrence of cracks in concrete.

参考文献/References:

[1] Jensen O M,Hansen P F.Influence of temperature on autogenous deformation and relative humidity change in hardening cement paste[J].Cement and Concrete Research,1999,29(4):567-575.
[2] 屈伟.大体积混凝土施工裂缝控制措施[J].建筑科学,2007,23(5):75-77.
  Qu Wei.Crack control technique of mass concrete construction [J].Construction Science,2007,23(5):75-77.(in Chinese)
[3] 陈瑜,张起森.水泥混凝土早期抗裂性能的研究现状[J].建筑材料学报,2007,7(4):411-417.
  Chen Yu,Zhang Qisen.Review of study on cement concrete cracking resistance at early ages[J]. Journal of Building Materials,2007,7(4):411-417.(in Chinese)
[4] 李小平,金虎.大体积混凝土水化热温度裂缝分析[J].低温建筑技术,2007(1):141-142.
  Li Xiaoping,Jin Hu.Analysis of cracks result from massive concrete hydration heat[J].Low Temperature Architecture Technology,2007(1):141-142.(in Chinese)
[5] 宋跟法,王冠军.大体积混凝土的水化热分析[J].山西建筑,2008,34(32):159-160.
  Song Genfa,Wang Guanjun.Hydration heat analysis of mass concrete[J].Shanxi Architecture,2008,34(32):159-160.(in Chinese)
[6] Isgor O B,Razaqpur A G.Finite element modeling of coupled heat transfer,moisture transport and carbonation processes in concrete structures [J].Cement and Concrete Composites,2004,26(1):57-73.
[7] Simonson C J,Tao Y X,Besant R W.Simultaneous heat and moisture transfer in fiberglass insulation with transient boundary conditions [J].ASHRAE Transactions,1996,102(11):315-327.
[8] 焦修刚,刘光廷.混凝土热湿耦合数值计算中的参数拟合[J].清华大学学报:自然科学版,2005,45(3):319-321.
  Jiao Xiugang,Liu Guangting.Parameter fitting in numerical analysis of coupled heat and mass transport in concrete [J].Journal of Tsinghua University:Science and Technology,2005,45(3):319-321.(in Chinese)
[9] 杨秋玲,马可栓.大体积混凝土水化热温度场三维有限元分析[J].哈尔滨工业大学学报,2004,36(2):61-63.
  Yang Qiuling,Ma Keshuan.Analysis of massive concrete 3-dimensional finite element hydrated heat temperature field [J].Journal of Harbin Institute of Technology,2004,36(2):61-63.(in Chinese)
[10] 朱伯芳.大体积混凝土温度应力与温度控制[M].北京:中国电力出版社,1996.

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[10]樊华,宋启根.用统计连续理论研究混凝土的力学性能[J].东南大学学报(自然科学版),1996,26(6):64.[doi:10.3969/j.issn.1001-0505.1996.06.013]
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备注/Memo

备注/Memo:
作者简介:刘玉峻(1985—),男,硕士生;钱春香(联系人),女,博士,教授,博士生导师,cxqainseu@163.com.
基金项目:国家重点基础研究发展计划(973计划)资助项目(2009CB623203).
引文格式: 刘玉峻,钱春香,庄园,等.二维散热条件对混凝土内部温度梯度及热传输的影响[J].东南大学学报:自然科学版,2011,41(4):820-823.[doi:10.3969/j.issn.1001-0505.2011.04.031]
更新日期/Last Update: 2011-07-20