| 碾压混凝土拱坝封拱温度场的仿真分析 |
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| 作者姓名： | ZHAO Jingwei ZHANG Bo ZHOU Binpeng |
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| 作者单位： | 1. 西北勘测设计研究院,陕西西安,710065
2. 西安理工大学水利水电学院,陕西西安,710048 |
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| 摘 要： | 混凝土坝的裂缝是一个带有普遍性的现象,因此有"无坝不裂"的说法。在大坝裂缝事故中,除少数裂缝是因结构不合理或地基不均匀沉降引起之外,大部分是由温度应力引起的。目前,普遍采用的拱梁分载法计算拱坝温度荷载难以描述拱坝在荷载作用下开裂状态。基于这一点,本文采用ANSYS有限元数值仿真技术、考虑混凝土材料的非线性,对某处于初设阶段的碾压混凝土拱坝采用混凝土多参数强度准则(非线性有限元法)进行计算。根据初设阶段资料和混凝土拱坝设计规范的要求对大坝关键部位进行等效应力计算并分析坝基面开裂状况,并对大坝封拱温度取值进行专门分析。在满足应力控制标准和施工可行的情况下提出合理的特征拱圈封拱温度值,以供设计人员参考。
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| 关 键 词： | 碾压混凝土拱坝 材料非线性 封拱温度 等效应力 |
Simulation analysis of arch-closure temperature of RCC arch dam |
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| ZHAO Jingwei,ZHANG Bo,ZHOU Binpeng.Simulation analysis of arch-closure temperature of RCC arch dam[J].Journal of water resources and water engineering,2011,22(2):126-131. |
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| Authors: | ZHAO Jingwei ZHANG Bo ZHOU Binpeng |
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| Affiliation: | ZHAO Jingwei1,ZHANG Bo2,ZHOU Binpeng1(1.Hydrochina Xibei Engineering Corporation,X i'an 710065,China,2.Faculty of Water Resources and Hydraulic Power,Xi'an University of Technology,Xi'an 710048,China) |
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| Abstract: | Crack in concrete dam is a universal phenomenon,so there is a say that no dam did not crack.Cracks in the dam accident,only a few cracks are due to unreasonable structure or uneven foundation settlement,most of them are caused by temperature stress.At present,it is difficult to describe the arch dam cracking state under the widely used arch-cantilever method to calculate arch dam temperature load.For this reason,the article used the ANSYS finite element simulation technology,thought about non-linear concret... |
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| Keywords: | RCC arch dam material nonlinear arch-closure temperature equivalent stress |
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