| 浇筑温度对大体积混凝土温度应力的影响 |
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| 引用本文： | 李潘武,曾宪哲,李博渊,逯跃林.浇筑温度对大体积混凝土温度应力的影响[J].长安大学学报(自然科学版),2011(5):68-71. |
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| 作者姓名： | 李潘武 曾宪哲 李博渊 逯跃林 |
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| 作者单位： | 长安大学建筑工程学院;陕西省天然气公司;长安大学公路学院; |
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| 基金项目： | 陕西省自然科学基金项目(2003E205) |
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| 摘 要： | 从大体积混凝土的温度应力对结构开裂的影响出发,分析了混凝土的浇筑温度对其施工期温度应力的影响。根据大体积混凝土在施工期裂缝发生的机理与其施工期的温度应力性能,利用数值分析方法,研究了大体积混凝土在浇筑温度变化时,大体积混凝土的温度应力对结构开裂的影响。结果表明:当大体积混凝土的浇筑温度升高时,水泥的水化速度加快,混凝土内部最高温度出现的时间提前;结构的第一主应力呈线性增大,其值为浇筑温度每提高1℃,结构的第一主应力增大2.47%;大体积混凝土的降温差和内外温差随着浇筑温度的提高而增加,且最大降温差和最大内外温差也随着浇筑温度的增大使其发生的时间有所提前。
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| 关 键 词： | 结构工程 大体积混凝土 浇筑温度 数值分析 温度应力 裂缝 |
Influence of placement temperature on mass concrete temperature stress |
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| LI Pan-wu,ZENG Xian-zhe,LI Bo-yuan,LU Yue-lin.Influence of placement temperature on mass concrete temperature stress[J].JOurnal of Chang’an University:Natural Science Edition,2011(5):68-71. |
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| Authors: | LI Pan-wu ZENG Xian-zhe LI Bo-yuan LU Yue-lin |
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| Institution: | LI Pan-wu1,ZENG Xian-zhe2,LI Bo-yuan3,LU Yue-lin1(1.School of Civil Engineering,Chang'an University,Xi'an 710061,Shaanxi,China,2.Shaanxi Province Company of Nature Gas,Xi'an 710063,3.School of Highway,Xi'an 710064,China) |
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| Abstract: | Based on the analyzing on structure cracking of the temperature stress of mass concrete,the influence on temperature stress during construction of concrete placement temperature was analyzed.According to the mechanism of mass concrete crack producing and performance of massive concrete temperature stress during construction,using the method of numerical analysis,mass concrete temperature stress and its influence factors were studied when mass concrete's placement temperature changes.The results show that th... |
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| Keywords: | structure engineering mass concrete placement temperature numerical analysis temperature stress crack |
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