【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更多还原

【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 concrete 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.更多还原