| 基于子模型法的碾压混凝土坝孔口结构施工期温度应力研究 |
| |
| 引用本文： | 孟凡深,陈守开,郭 磊.基于子模型法的碾压混凝土坝孔口结构施工期温度应力研究[J].农业工程学报,2012,28(9):90-95. |
| |
| 作者姓名： | 孟凡深 陈守开 郭 磊 |
| |
| 作者单位： | 1. 洛阳理工学院土木工程系,洛阳,471023
2. 华北水利水电学院水利学院,郑州,450011 |
| |
| 基金项目： | 国家自然科学基金资助项目（51109081） |
| |
| 摘 要： | 该文针对混凝土坝孔口结构尺寸相对很小的问题,引入有限元子模型法,解决了子模型切割边界的边值问题,同时提出了减小子模型法存在时间域和空间域离散误差的方法,实现了混凝土坝孔口结构的精确仿真。在此研究基础上,依托某碾压混凝土坝工程,对大坝孔口结构进行了施工期温度场和应力场的仿真计算,重点分析了泄流中孔结构施工期温度和应力的变化及分布规律。研究表明,孔口混凝土在施工早期(10～30d)出现较大拉应力,最大拉应力出现在浇筑后的第一个冬季。子模型法为研究大坝孔口结构的温度场和应力场提供了有效的途径。
|
| 关 键 词： | 大坝 温度 应力 孔口结构 子模型法 碾压混凝土坝 |
| 收稿时间： | 2011/10/8 0:00:00 |
| 修稿时间： | 2012/2/24 0:00:00 |
Study on thermal stress of orifice structure of RCCD in construction period based on sub-model method |
| |
| Meng Fanshen,Chen Shoukai and Guo Lei.Study on thermal stress of orifice structure of RCCD in construction period based on sub-model method[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(9):90-95. |
| |
| Authors: | Meng Fanshen Chen Shoukai and Guo Lei |
| |
| Institution: | 1. Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China; 2. College of Water Resources, North China University of Water Resources and Electric Power, Zhengzhou 450011, China) |
| |
| Abstract: | In view of the orifice structure which was much smaller than the dam, the sub-model method was introduced, and the problem of cut boundary value was solved, and then the method of reducing error of the time and space domain was put forward. Then, the accurate simulation of the orifice structure of concrete dam was achieved. Based on the method and a RCCD project, the simulation of the temperature and stress field was carried out, and the variation and distribution of temperature and stress of a typical orifice structure were analyzed in detail. The results showed that the large tensile stress occured at early age (10-30 d), and the maximum appeared in the first winter. In addition, the sub-model method can provide an effective way for studying the temperature and stress field of dam orifice structure. |
| |
| Keywords: | dams temperature stress orifice structure sub-model method RCCD |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
| 点击此处可从《农业工程学报》下载免费的PDF全文 |
|
