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| Numerical Analysis on Seismic Response of Shiziping Earth-rockfill Dam |
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Numerical Analysis on Seismic Response of Shiziping Earth-rockfill Dam 作者  ing, XM (Ding, Xuanming)[ 1,2 ] ; Kong, GQ (Kong, Gangqiang)[ 1 ] ; Liu, HL (Liu, Hanlong)[ 1 ] ; Zuo, WL (Zuo, Weilong)[ 3 ]DISASTER ADVANCES 卷: 6 页: 94-101 特刊: 1 出版年: MAR 2013 文献类型:Article 查看期刊影响力 摘要 The Shiziping hydropower station locates at the Li county in Sichuan province in China. The distance from the epicenter of Wenchuan earthquake to dam site is only about 55km. It is a zone with high seismic intensity, so the safety of dam during earthquakes is of great importance. Three dimensional dynamic finite element method (FEM) analysis is employed to study the dynamic behaviour of the dam during earthquakes. The initial stress fields of the soil elements are computed by static calculation, in which the nonlinear elastic Duncan-Chang constitutive model has been adopted to simulate soil behavior. In dynamic calculation, the soil is considered to be viscoelastic material and the equivalent linearization dynamic constitutive model is also applied for simulation. The viscous-elastic boundary is set along the model boundaries. The results indicate that the acceleration response is symmetrical along dam axis, which decreases gradually from the center of valley to two banks. The acceleration response on top of dam at the center of valley is the largest. The maximum acceleration responses in X direction under seismic waves A and B are 3.61m/s(2) and 5.64m/s(2), the amplifications of which are 2.47 and 2.11, respectively The dynamic shear stress is increased as the distance from dam face increases. The maximum dynamic shear stress response in overburden is about 400kPa. The minimum dynamic stresses under seismic waves A and B are -1.10 MPa and -1.60 MP a, respectively The dynamic tension stress in grouting gallery is very large, so the local tension crack is possible. The vertical maximum permanent deformation occurs at the top of dam near the middle of riverbed. The maximum vertical permanent deformations under the action of seismic waves A and B are 44.5cm and 60.4cm, respectively. The shear stress varies during the process of earthquake, so the safety factor of dam slope is a function of time. The minimum safety factor of upstream dam slope under seismic wave B is 1.19 and that of downstream dam slope is 1.06. All the safety factors are greater than 1.0, thus the dam slope is steady during earthquake. 关键词 作者关键词:Earth-rockfill Dam; Dynamic Response; Finite Element Method; Acceleration Response; Permanent Deformation 作者信息 通讯作者地址: Hohai University Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China. 通讯作者地址: Ding, XM (corresponding author) 显示更多 Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China. 地址: 显示更多 [ 1 ] Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Jiangsu, Peoples R China 显示更多 [ 2 ] Hohai Univ, Natl Engn Res Ctr Water Resources Efficient Utili, Nanjing 210098, Jiangsu, Peoples R China [ 3 ] Water Resources Co Ltd, Jiangsu Surveying & Design Inst, Yangzhou 225009, Peoples R China 电子邮件地址:dxmhhu@163.com 基金资助致谢 基金资助机构显示详情 授权号 Program for Changjiang Scholars & Innovative Research Team in University (PCSIRT) IRT1125 Ministry of Education, China - 111 Project B13024 333 project of Jiangsu province of China BRA2011146 查看基金资助信息 出版商 DISASTER ADVANCES, SECTOR AG-80, SCHEME NO 54, VIJAY NAGAR, A B RD, INDORE, 452010, INDIA 类别 / 分类 研究方向:Geology; Meteorology & Atmospheric Sciences; Water Resources Web of Science 类别:Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; Water Resources 文献信息 语言:English 入藏号: WOS:000317246200012 ISSN: 0974-262X eISSN: 2278-4543 其他信息 IDS 号: 121LL Web of Science 核心合集中的 "引用的参考文献": 17 Web of Science 核心合集中的 "被引频次": 1 |
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