某碾压混凝土重力坝温度应力仿真分析

发布时间：2018-11-07 12:10

【摘要】：近年来，碾压混凝土重力坝在国内外得到了广泛运用，日渐成为一种流行坝型，得益于其具有施工安全、速度快、造价低等特点。碾压混凝土重力坝的温度场及温度应力场仿真分析一直是一项重要的研究课题，也是制定碾压混凝土重力坝合理温度控制措施的重要依据，具有重要的工程实践价值，因此开展这方面的研究十分必要。本文以张家坡水库碾压混凝土重力坝为例，利用ANSYS软件建立了有限元仿真分析典型坝段（挡水坝段、溢流坝段）模型，采用ANSYS软件模拟计算了典型坝段施工期、过渡期的温度场及温度应力场。仿真模拟计算中，，考虑了不同的混凝土浇筑温度、不同施工间歇等因素对温度场及温度应力场的影响。本文主要研究工作如下: （1）利用ANSYS软件，建立张家坡水库碾压混凝土重力坝典型坝段（挡水坝段、溢流坝段）三维有限元仿真模型；（2）基于ANSYS平台，编制张家坡水库碾压混凝土重力坝典型坝段（挡水坝段、溢流坝段）温度场和温度应力场的APDL参数设计语言程序；（3）计算、分析张家坡水库挡水坝段在不同工况下，坝体施工期及过渡期中温度场、应力场的变化；以挡水坝段计算成果为基础，选出合理控制工况，对溢流坝段也进行了温度场、应力场的计算分析。采用合理控制工况作为施工推荐方案，研究成果用以指导实际工程的施工。
[Abstract]:In recent years, roller compacted concrete gravity dams have been widely used at home and abroad, and become a popular dam type day by day, thanks to its characteristics of safe construction, fast construction, low cost and so on. The simulation analysis of temperature field and thermal stress field of RCC gravity dam is always an important research subject, and also an important basis for formulating reasonable temperature control measures of RCC gravity dam, which has important engineering practical value. Therefore, it is necessary to carry out research in this field. Taking the RCC gravity dam of Zhangjiapo Reservoir as an example, the finite element simulation analysis model of typical dam segment (water retaining dam section, overflow dam section) is established by using ANSYS software, and the typical dam section construction period is simulated by ANSYS software. The temperature field and the temperature stress field in the transition period. In the simulation calculation, the influence of different pouring temperature and different construction interval on the temperature field and the temperature stress field is considered. The main research work of this paper is as follows: (1) using ANSYS software, the 3D finite element simulation model of typical RCC gravity dam section (water retaining section, overflow dam section) of Zhangjiapo reservoir is established. (2) based on the ANSYS platform, the APDL parameter design language program of the typical RCC gravity dam section (water retaining dam, overflow dam section) of Zhangjiapo Reservoir is compiled. (3) calculate and analyze the change of temperature field and stress field of Zhangjiapo reservoir during the construction period and transition period under different working conditions; Based on the calculation results of water retaining dam section, the reasonable control conditions are selected, and the temperature field and stress field of overflow dam section are calculated and analyzed. The research results are used to guide the construction of practical projects by adopting reasonable control conditions as the recommended construction scheme.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV642;TV315

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