| 预冷流模式下混凝土箱梁水化热场时程分布与计算方法 |
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| 引用本文： | 王翠娟,贺拴海,张岗.预冷流模式下混凝土箱梁水化热场时程分布与计算方法[J].武汉理工大学学报,2012,34(1):90-94. |
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| 作者姓名： | 王翠娟 贺拴海 张岗 |
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| 作者单位： | 长安大学交通行业旧桥检测与加固重点试验室,西安,710064 |
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| 基金项目： | 国家交通运输部西部交通建设科技项目，中央高校基本科研业务专项资金项目，国家自然科学基金 |
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| 摘 要： | 推导了混凝土水化热预冷流复合降热方程,建立了混凝土水化热预冷流模式。采用大型空间有限元程序AN-SYS,对浇注箱梁墩顶块混凝土水化热场进行时程分析,分析了温度峰值和温差峰值的时程变化规律,提出了实用计算公式。结果表明:预冷流模式可明显降低浇注混凝土的水化热温度峰值和温差峰值,缩短最大温度峰值出现的时间,而不改变温差峰值发生的时间。实用计算公式简单明确。
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| 关 键 词： | 桥梁工程 混凝土箱梁 水化热 预冷流 时程分析 |
Time-dependent Distribution of Hydration Heat Temperature Fields for Concrete Box Girders Under Pre-cool Fluent Model and Calculation Method |
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| WANG Cui-juan
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HE Shuan-hai
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ZHANG Gang.Time-dependent Distribution of Hydration Heat Temperature Fields for Concrete Box Girders Under Pre-cool Fluent Model and Calculation Method[J].Journal of Wuhan University of Technology,2012,34(1):90-94. |
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| Authors: | WANG Cui-juan HE Shuan-hai ZHANG Gang |
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| Affiliation: | (Key Laboratory of Old Bridge Detection and Reinforcement Technique in Traffic Industry, Chang’an University,Xi’an 710064,China) |
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| Abstract: | The pre-cool fluent equation of hydration heat for concrete was deduced,the pre-cool fluent model of hydration heat for concrete was built.The FEM procedure ANSYS was adopted,the hydration heat temperature field was analyzed by time-dependent relation,the time-dependent curve of maximum temperature peak value and minimum temperature peak value was studied.The studied results indicate: the hydration heat temperature peak value and he hydration heat temperature difference peak value can obviously reduced by way of pre-cool fluent model,short the occurrence time of the maximum temperature,the latter occurrence time can keep invariable.All in all,the calculation formula is simple. |
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| Keywords: | bridge engineering concrete box girder hydration heat pre-cool fluent time-dependent analysis |
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