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| 基于等效时间的早期混凝土温度裂缝分析 |
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张子明1,郑国芳2,宋智通2
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1. 河海大学,土木工程学院,江苏,南京,210098
2. 南京水利科学研究院,江苏,南京,210029
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| 摘要: |
| 基于等效时间的混凝土绝热温升、热传导方程，考虑温度对早期混凝土水化热化学反应速率和徐变特性的影响，计算了大体积混凝土墙中心的温升。采用裂缝带模型计算温度裂缝，用半解析迭代法进行了混凝土墙的温度应力和开裂计算。 |
| 关键词: 混凝土 水化热 等效时间 裂缝带模型 应力 混凝土墙 温度裂缝 |
| DOI： |
| 分类号:TV315 TV544.91 |
| 基金项目:国家自然科学基金资助项目(50379004) |
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| Temperature cracking analysis of concrete in early age based on equivalent time |
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ZHANG Zi-ming,ZHENG Guo-fang,SONG Zi-tong . College of Civil Engineering,Hohai University,Nanjing,China, . Nanjing Hydraulic Research Institute,Nanjing,China)
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ZHANG Zi-ming~1,ZHENG Guo-fang~2,SONG Zi-tong~2 1. College of Civil Engineering,Hohai University,Nanjing210098,China, 2. Nanjing Hydraulic Research Institute,Nanjing210029,China)
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| Abstract: |
| The temperature rise at the center of a massive concrete wall is calculated by using the adiabatic rise of temperature and heat conduction equations of concrete based on the equivalent time, and considering effects of temperature on the hydration heat reaction ratio and creep characteristics of early-age concrete. The temperature cracks are calculated by use of a crack band model, and the stress and cracking of the concrete wall are computed by using the half-analytical iteration method. |
| Key words: hydration heat of concrete,equivalent time,crack band model,cracking in concrete,stress,concrete wall |
