Abstract The combined dam structure is constructed by large volume conventional concrete and roller compacted concrete. The differences of the thermodynamic properties of different concrete materials are the primary causes of deformation coordination problem of concrete dam. The finite element method is adopted to calculate the temperature-stress field during construction and operation periods of the combined damming structure according to the experimental results of different concrete and the construction schedule of combined dam structure. The validity and reliability of the calculation results are verified by long-term actual monitoring temperature. During the construction and operation of the dam, the evolution law of temperature field is considered under the action of environmental temperature, water temperature, concrete hydration heat, concrete heat dissipation performance and water pipe cooling. By coupling the temperature field with the structural stress field, the deformation coordination of materials in dam partitions and the non-linear contact behavior of interface are analyzed. The results show that in the aspect of temperature control, the temperature stratification is obvious in the early stage of concrete pouring, and tends to be stable in the later stage. The upstream surface of the dam is greatly affected by the temperature of reservoir water. In dam deformation coordination and interface contact, the displacement value along the river direction is greatly affected by the upstream water level, showing a significant positive correlation. There are differences in relative displacements of different areas, so we should pay more attention to the change of regional displacements in safety monitoring.

中文翻译：

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CC-RCC组合坝结构施工期及运营期热变形协调分析

摘要 组合坝结构由大体积常规混凝土和碾压混凝土构成。不同混凝土材料热力学性质的差异是引起混凝土坝变形协调问题的主要原因。根据不同混凝土的试验结果和组合坝结构的施工进度，采用有限元方法计算组合坝结构施工期和运营期的温度-应力场。通过长期实际监测温度，验证了计算结果的有效性和可靠性。大坝建设运营过程中，考虑了环境温度、水温、混凝土水化热作用下的温度场演化规律，混凝土散热性能和水管冷却。通过温度场与结构应力场的耦合，分析了大坝隔墙材料的变形协调和界面的非线性接触行为。结果表明，在温度控制方面，混凝土浇筑前期温度分层明显，后期趋于稳定。大坝上游水面受水库水温影响较大。在大坝变形协调和界面接触中，沿河方向的位移值受上游水位影响较大，呈显着正相关。不同区域的相对位移存在差异，