| 考虑温度历程效应的氧化镁微膨胀混凝土仿真分析模型 |
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| 引用本文： | 张国新,金峰,罗小青,杨波.考虑温度历程效应的氧化镁微膨胀混凝土仿真分析模型[J].水利学报,2002,33(8):0029-0035. |
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| 作者姓名： | 张国新 金峰 罗小青 杨波 |
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| 作者单位： | 1. 中国水利水电科学研究院结材所,北京,100044
2. 清华大学,水利水电工程系,北京,100084 |
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| 摘 要： | MgO混凝土的试验成果揭示: 温度对MgO混凝土膨胀特性有重大影响. 混凝土在实际浇筑和养护过程中, 将经历复杂的温度变化过程, 为实现对MgO混凝土结构的仿真分析, 提出 了考虑温度历程效应的MgO微膨胀混凝土仿真分析模型, 并通过简单算例进行了验证说明. 初步分析结果还说明: (1) 常温情况下, 入仓温度对MgO混凝土有效膨胀量的影响不大; (2) MgO引起的膨胀会有效降低内部混凝土的拉应力, 但可能会增大混凝土表面早期的拉应力.
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| 关 键 词： | 微膨胀混凝土 温度历程 膨胀模型 |
| 文章编号： | 0559-9350(2002)08-0029-06 |
| 修稿时间： | 2000年9月17日 |
Simulation of expansion process of MgO concrete considering the temperature history effect |
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| ZHANG Guo-xin,JIN Feng,LUO Xiao-qing,YANG Bo.Simulation of expansion process of MgO concrete considering the temperature history effect[J].Journal of Hydraulic Engineering,2002,33(8):0029-0035. |
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| Authors: | ZHANG Guo-xin JIN Feng LUO Xiao-qing YANG Bo |
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| Affiliation: | 1.China Institute of Water Resources and Hydropower Research; 2Tsinghau University |
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| Abstract: | A model for simulating the expansion of MgO concrete is established. In the model the effect of complicated temperature variation process during the construction of concrete is taken into account. The validity of the model is verified by the calculation result of an example. The result shows that:1) the influence of concete placing temperature on expansion is not significant if the surrounding temperature is normal, 2) the expansion due to the effect of MgO reduces the interior tension of the concrete but enhances the surface tension in the early stage. |
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| Keywords: | concrete with gentle volume expansion temperature history expansive model |
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