中文摘要：

现行《混凝土拱坝设计规范》（SL282—2003）关于拱梁分载法温度荷载的简化公式尚不能很好地考虑拱坝的导温系数和水温边界，以至拱坝表面温度应力的计算误差较大并影响温控防裂措施．以小湾水电站高拱坝工程为依托，在全坝段、全过程三维有限元仿真反馈分析成果的基础上，分析了拱坝温度场时空分布规律，论证了解析解与数值解的一致性以及解析解的适用范围；应用复变函数法和傅里叶变换法，建立了拱梁分载法温度荷载的简化公式．算例结果表明，该简化公式计算温度荷载的精度有明显提高，因其可以较好地考虑混凝土导温系数和水温边界影响．

英文摘要：

Now, the simplified formula of temperature load in the current Design specification for concrete arch dams （SL 282-2003） for the arch cantilever method did not take coefficient of thermal conductivity and water temperature boundaries into account perfectly, the error caused by which when calculating thermal stresses near the arch dam surface is so big that it influenced temperature control and anti-cracking measurements. Therefore, taking Xiaowan high arch dam as an engineering background, basing on the back-analysis simulation results considering the overall construction process and whole dam range finite el ement mesh, the time-space distribution laws of temperature filed in the arch dam was analyzed; the con sistency between the analytic solutions and numerical results is proved; and the application scope of the an- alytic solutions is presented. Using the function of complex variable method and the Fourier transform, a new simplified formula of temperature load for concrete arch dam is established, which could be applied in the arch cantilever method. The better precision of the simplified formula is presented. A case study results show that the simplified formula has better precision due to considering better conductivity coefficient and water temperature boundaries when calculating temperature load.