在碾压混凝土（RCC）结构的施工过程中，温控分析是专家学者关注的重点之一。根据RCC薄层浇筑的特点，人们采用层合单元进行网格划分，能有效减少计算模型的节点和单元数；但层合单元模拟浇筑过程需要进行网格重组，且在薄层新浇混凝土与相邻老混凝土的连接部位，层合单元无法直接应用，这些都增加了仿真分析的难度。从有限元单元技术出发，提出的生长连接模型能有效模拟RCC结构的连续浇筑过程，并避免了网格重组，同时解决了新老混凝土单元的连接问题，在保证计算精度的同时提高了计算效率。通过对典型RCC大坝工程施工期温度场的仿真分析，验证了生长连接模型的有效性、合理性。

Transient analysis on thermal effect in roller compacted concrete(RCC) during construction is very important for quality control. RCC is of thin layers with fast rising and each layers material properties are different for various ages. Laminated element including multi-layer materials can efficiently reduce calculating scale. But laminated element has a progress of element combination and cant be used between new and old concrete, which increase the difficulty of simulating reality of RCC. Growing-joint model proposed in the paper can effectively avoids element recombination and can deal with problems induced by connection of elements between new casting concrete and casted concrete, which provides gradual transition between fine and coarse meshes. So it not only improves efficiency but also retains precision. The results of example calculation show that growing-joint model is applicable to RCC construction.