| 刘君,孔宪京,ShyuKuokai.DDA与FEM耦合法在分缝重力坝非线性分析中的应用[J].计算力学学报,2004,21(5):585~591 |
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| DDA与FEM耦合法在分缝重力坝非线性分析中的应用 |
| DDA coupled FEM and its application in concrete gravity dams with joints |
| 修订日期：2002-12-20 |
| DOI：10.7511/jslx20045104 |
| 中文关键词: 非连续变形分析 有限元 耦合 纵缝 重力坝 接触 |
| 英文关键词:discontinuous deformation analysis,finite element method,coupling,longitudinal joint,gravity dam,contact |
| 基金项目:大连理工大学土木水利学院青年教师基金资助. |
| 刘君 孔宪京 ShyuKuokai |
| [1]大连理工大学土木水利学院工程抗震研究所,辽宁大连116024 [2]美国北卡罗莱纳州立大学土木工程系,北卡罗莱纳州格林斯博罗27411 |
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| 中文摘要: |
| 混凝土重力坝一般设有数条纵缝。纵缝使坝体的连续性遭到破坏，一般的有限单元法很难处理这样的不连续变形问题。本文首先阐述了DDA(Discontinuous Deformation Analysis)与FEM(Finite Element Method)耦合算法的原理，然后采用作者自行研制的DDA与FEM耦合法程序对一实际重力坝进行了详细的计算分析。重点讨论了纵缝的不同设置形式和缝宽大小对坝体变形和应力分布、坝底面接触应力分布以及坝基面应力分布的影响，为工程设计提供依据。 |
| 英文摘要: |
| Concrete gravity dams are constructed with multiple longitudinal joints. In order to avoid excessive stresses convergence, bended joints are designed at the top of longitudinal joints. Because of the existence of longitudinal joints the deformations of the dams become discontinuous and it is difficult to compute such deformations using conventional Finite Element Method (FEM). In this paper, the Discontinuous Deformation Analysis (DDA) coupled with FEM is proposed. Using the program developed by the authors, a concrete gravity dam with multiple longitudinal joints is computed in detail. Different longitudinal joint shape and gap size are considered in the effects on the deformations and the stress distributions in the dam. From the results, two conclusions can be obtained: (1) DDA coupled with FEM enhances the ability of modeling block's deformation and stress distribution filed; (2) The deformations and the stresses in the dam with the bended joints are smaller than those with straight joints, so it is better to design concrete gravity dam with bended joints. |
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