Abstract: In the simulation calculation of temperature stress of arch dam, the characteristic parameters of concrete material are directly related to the accuracy of the numerical calculation results. In order to improve the authenticity of the simulation calculation, it is necessary to perform inversion analysis on the concrete thermodynamic parameters. In this paper, combined with a RCC arch dam as a case, with the aid of a three- dimensional finite element program, based on the site monitoring data, the least square method with regression analysis is used to inverse analysis of the thermal parameters of the concrete. The results show that the thermal parameters obtained by the inversion can reflect the actual project well. On this basis, the temperature and stress during the whole construction period of the RCC arch dam are simulated and analyzed, and the actual temperature distribution and force characteristics of the arch dam are tracked and fed back. The research results can guide the project construction and this paper has some reference value for similar projects.

Key words: roller compacted concrete arch dam, site monitoring data, temperature inversion, temperature stress, simulation calculation

摘要： 在拱坝的温度应力仿真计算中，混凝土材料特性参数直接关系到数值计算结果的准确性。为了提升仿真计算的真实性，需对混凝土热力学参数进行反演分析。依托某碾压混凝土拱坝，借助三维有限元程序，基于工程现场监测资料，采用回归分析的最小二乘法对混凝土的热学参数进行反演分析。结果表明，反演得到的热学参数能较好地反映工程现场实际。在此基础上，对碾压混凝土拱坝全坝全过程施工期温度和应力进行仿真分析，跟踪反馈拱坝真实温度分布和受力特性。该研究成果可以指导工程现场施工，并对类似工程具有一定参考价值。

关键词: 碾压混凝土拱坝, 现场监测资料, 温度反演, 温度应力, 仿真计算