Double-curvature dams are unique structures for several reasons. Their behaviour changes significantly after joint grouting, when they turn from a set of independent cantilevers into a monolithic structure with arch effect. The construction process has a relevant influence on the stress state, due to the way in which self-weight loads are transmitted, and to the effect on the dissipation of the hydration heat. Temperature variations in the dam body with respect to those existing at joint grouting generate thermal stresses that may be important in the stress state of the structure. It is thus essential to have a realistic estimate of this thermal field, also called reference or closing temperature. In this work, the factors involved in the calculation of the reference temperature of double-curvature arch dams are analysed: material properties, boundary conditions and numerical aspects. First, a critical review of the state of the art is made with respect to the criteria used by various authors for decision-making in the construction of the model. Next, specific analyses are made on the effect of some important elements: the time step, the size of the domain of analysis and the methodology used for the calculation of the reference temperature. The results show the relevance of a correct calculation of the closing temperature to adequately determine the stress state of the structure.

双曲坝由于多种原因而具有独特的结构。当它们从一组独立的悬臂变成具有拱效应的整体结构时，它们的行为在联合注浆后会发生显着变化。由于自重载荷的传递方式以及对水化热量散发的影响，施工过程对应力状态有重要影响。相对于接缝灌浆中存在的温度变化，坝体中的温度变化会产生热应力，这在结构的应力状态下可能很重要。因此，必须对该温度场（也称为参考温度或关闭温度）进行实际估算。在这项工作中，分析了双曲拱坝参考温度计算中涉及的因素：材料特性，边界条件和数值方面。首先，针对各种作者在模型构建中用于决策的标准进行了最新的技术性审查。接下来，将对一些重要因素的影响进行具体分析：时间步长，分析范围的大小以及用于计算参考温度的方法。结果表明正确计算关闭温度以充分确定结构的应力状态的相关性。分析范围的大小以及用于计算参考温度的方法。结果表明正确计算关闭温度以充分确定结构的应力状态的相关性。分析范围的大小以及用于计算参考温度的方法。结果表明正确计算关闭温度以充分确定结构的应力状态的相关性。