| 温变条件下含气量对混凝土温度应力影响 |
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| 引用本文： | 赵亚丁,巴恒静,侯志伟.温变条件下含气量对混凝土温度应力影响[J].低温建筑技术,2008,30(2):1-3. |
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| 作者姓名： | 赵亚丁 巴恒静 侯志伟 |
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| 作者单位： | 哈尔滨工业大学,材料科学与工程学院,哈尔滨,150006 |
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| 摘 要： | 试验主要利用ANSYS有限元方法,模拟分析了温变疲劳条件下,混凝土温度应力分布及其随时间的变化规律,以及含气量对混凝土温度应力的影响。研究结果表明:随着含气量的增加,混凝土内外最大温差和最大温度应力逐渐增大。低水灰比混凝土最大温差为10.5℃,最大温度应力为2.76MPa;高水灰比混凝土最大温差为15℃,最大温度应力为3.83MPa。不掺引气剂时,水灰比越低,混凝土传热时间越短,最大温度应力越小。
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| 关 键 词： | 混凝土 温度应力 含气量 |
| 文章编号： | 1001-6864(2008)02-0001-03 |
| 修稿时间： | 2007年11月20 |
INFLUENCE OF AIR CONTENT ON TEMPERATURE STRESSES OF CONCRETE UNDER TEMPERATURE FLUCTUATION |
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| ZHAO Ya-ding,BA Heng-jing,HOU Zhi-wei.INFLUENCE OF AIR CONTENT ON TEMPERATURE STRESSES OF CONCRETE UNDER TEMPERATURE FLUCTUATION[J].Low Temperature Architecture Technology,2008,30(2):1-3. |
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| Authors: | ZHAO Ya-ding BA Heng-jing HOU Zhi-wei |
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| Affiliation: | ZHAO Ya-ding,BA Heng-jing,HOU Zhi-wei (School of Materials Science , Engineering,Harbin Institute of Technology,Harbin 150006,China) |
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| Abstract: | By using the finite element software of ANSYS,the time-dependent temperature stress distribution of concrete under the condition of temperature fluctuation was analyzed,so as to the influence of air content on temperature stress.The results show that higher air content leads to higher temperature difference and temperature stress.For the concrete with lower water to cement ratio,the highest temperature difference is 10.5℃,and the corresponding temperature stress is 2.76MPa.For the concrete with higher water to cement ratio,these two parameters could be as high as 15℃ and 3.83MPa.Without air entraining admixture,the lower is water to cement ratio the quicker is the heat transformation and the lower temperature stress. |
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| Keywords: | concrete temperature stress air content |
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