| 边界条件对土石坝地震反应的影响研究 |
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| 引用本文： | 邹德高,徐斌,孔宪京.边界条件对土石坝地震反应的影响研究[J].岩土力学,2008,29(Z1):101-106. |
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| 作者姓名： | 邹德高 徐斌 孔宪京 |
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| 作者单位： | 大连理工大学,土木水利学院,大连,116024;大连理工大学,土木水利学院,大连,116024 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金，教育部创新团队发展基金 |
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| 摘 要： | 土石坝地震反应分析中,需要对有限网格的边界条件进行处理,以反应实际地基在空间上的无限性.分别采用黏性边界和刚性边界,对土石坝进行了动力分析.结果表明:随着坝高增加,黏性边界对坝顶加速度反应影响逐渐增大;对于均质坝,考虑黏性边界计算的坝顶加速度反应约比刚性边界低10 %～30 %;对于实际双江口直心墙土石坝,考虑黏性边界计算的坝顶加速度反应约比刚性边界低30 %～40 %左右.
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| 关 键 词： | 黏性边界 土石坝 时域 地震反应 |
| 收稿时间： | 2008-07-25 |
Study of influence of boundary condition on rockfill dam seismic response |
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| ZOU De-gao,XU Bin,KONG Xian-jing.Study of influence of boundary condition on rockfill dam seismic response[J].Rock and Soil Mechanics,2008,29(Z1):101-106. |
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| Authors: | ZOU De-gao XU Bin KONG Xian-jing |
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| Institution: | 1. The State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2. School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | In order to simulate the infinite domain,a special boundary condition should be used in the dynamic analysis of rockfill dam with the finite element method.A series of dynamic analyses are performed in time domain by using viscous and rigid boundary respectively and compared with dynamic analysis results in frequency domain.The results show that,with the increase of the height of rockfill dam,the influence of viscous boundary become increasingly obvious.The acceleration of dam top calculated with viscous bo... |
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| Keywords: | viscous boundary rockfill dam time domain seismic response |
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