基于有限元堆石混凝土坝温度仿真模拟分析
Temperature Simulation and Modeling Analysis of Rockfill Concrete Dams Based on Finite Element

堆石混凝土坝的稳定性是保障坝体施工期安全运作的重要因素之一。堆石混凝土坝的不稳定性可能导致坝体受温度梯度影响而破坏，从而引发严重的灾害，造成人员伤亡和财产损失。因此，保证堆石坝施工期的稳定性对于保证人民生命财产安全和维护社会稳定具有重要意义。采用有限元ANSYS对坝体进行建模，以陕西镇安抽水蓄能电站拦沙坝工程为例，建立大坝并分仓浇筑混凝土的二维有限元分析模型，从而进行对比和研究分析，研究堆石混凝土坝温度和变化规律并且受外界温度、温度初始条件和边界条件的施加、水化热模拟以及温度荷载的施加、混凝土弹性模量变化、徐变模型的处理。验证温度变化规律及ANSYS数值模拟，对堆石混凝土坝施工期稳定性的研究开展具有重要意义。
The stability of rockfill concrete dam is one of the important factors to ensure the safe operation of the dam during construction. The instability of rockfill concrete dam may cause the dam to be damaged by the influence of temperature gradient, which will lead to serious disasters, resulting in casualties and property losses. Therefore, it is of great significance to ensure the stability of rockfill dam construction period for ensuring the safety of people’s lives and property and maintaining social stability. The finite element ANSYS is used to model the dam body. Taking the sand dam project of Zhen’an Pumped Storage Power Station in Shaanxi Province as an example, a two-dimensional finite element analysis model of dam and concrete pouring is established, so as to compare and study the temperature and variation law of rockfill concrete dam, which is affected by external temperature, initial temperature conditions and boundary conditions, hydration heat simulation, temperature load application, concrete elastic modulus change and creep model treatment. It is of great significance to verify the temperature variation law and ANSYS numerical simulation for the study of the stability of rockfill concrete dam during construction.