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4.1引言从数十年的工程实践经验和理论分析充分地认识到,早期温度变化和温度导致的应力会严重影响混凝土和混凝土结构的质量。为了提高混凝土结构的质量和性能,控制这些温度和相关应力至关重要。定量确定工艺技术措施改善质量的效果,可以使用数值仿真技术。仿真程序必须能够预测温度、强度、应力的发展变化和早期开裂的危险性[54]。尽管在混凝土中,应力和开裂危险性与温度之间不是线性关系[4],但在混凝土结构的热分析中,温度和温
4.1 Introduction From decades of engineering practice and theoretical analysis, it is well recognized that the stresses caused by early temperature changes and temperatures can seriously affect the quality of concrete and concrete structures. In order to improve the quality and performance of concrete structures, controlling these temperatures and related stresses is crucial. Quantitatively determine the effect of process measures to improve quality, numerical simulation techniques can be used. The simulation program must be able to predict the development of temperature, strength, stress and the risk of early cracking [54]. Although in concrete, the risk of stress and cracking is not linear with the temperature [4], but in the thermal analysis of concrete structures, the temperature and the temperature