A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam)
Due to accuray of numerical methods and constitutive equations, a comparison of these methods with the classical methods of dynamic analysis of earthfill dams seems necessary. The results of Seed-Makdisi, Sarma and Ambrasys-Sarma analysis of a homogenous dam are compared with those of Quake/W and Sl...
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Shahid Chamran University of Ahvaz
2017-08-01
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| Series: | علوم و مهندسی آبیاری |
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| Online Access: | http://jise.scu.ac.ir/article_13184_1897970cf4b54817b16c04ed63cbc2ba.pdf |
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| author | Masoud Oulapour Mohammad Amjad Zade Hosein Mohmmad vali samani |
| author_facet | Masoud Oulapour Mohammad Amjad Zade Hosein Mohmmad vali samani |
| author_sort | Masoud Oulapour |
| collection | DOAJ |
| description | Due to accuray of numerical methods and constitutive equations, a comparison of these methods with the classical methods of dynamic analysis of earthfill dams seems necessary. The results of Seed-Makdisi, Sarma and Ambrasys-Sarma analysis of a homogenous dam are compared with those of Quake/W and Slope/W softwares. A code is developed for calculating permanent displacements based on Newmark double integration method. The results of linear and equivalent linear models show that, due to unrealistic linear assumption of the behaviour of the material, the calculated accelerations are high and the analytical methods are overdesign. This is due to realistic constitutive models. Also, in homogenous dam, as the assumed critical wedge in analytical methods is different from that calculated in numerical analyses, the critical acceleration estimated is different too (0.45g in Ambrasys-Sarma method compared to 0.26g in equivalent linear model for a wedge of 0.6h depth). This shows that realistic models must be utilized. In the developed code first the average aceleration of assumed wedge is calculated using acceleration calculated with finite element codes utilizing modern constitutive models and consequently the permanent displacements are calculated. The results show that the current methods are overestimating. Also, the assumed critical wedges are unrealestic and pass through the dam core. While the critical wedges pass through downstream shell. The permanent displacement of a wedge with 0.6h depth is estimated to be 3 cm compared to zero in Sarma method. The developed code was used for dynamic analysis of Balarud earthfill dams. |
| first_indexed | 2024-12-10T04:05:02Z |
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| institution | Directory Open Access Journal |
| issn | 2588-5952 2588-5960 |
| language | fas |
| last_indexed | 2024-12-10T04:05:02Z |
| publishDate | 2017-08-01 |
| publisher | Shahid Chamran University of Ahvaz |
| record_format | Article |
| series | علوم و مهندسی آبیاری |
| spelling | doaj.art-63f44f37d9b248a29181753033bc13652022-12-22T02:02:52ZfasShahid Chamran University of Ahvazعلوم و مهندسی آبیاری2588-59522588-59602017-08-0140226528110.22055/jise.2017.1318413184A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam)Masoud Oulapour0Mohammad Amjad Zade1Hosein Mohmmad vali samani2عضو هیئت علمی- گروه مهندسی عمران دانشگاه شهید چمران اهوازدانشگاه شهید چمران- گروه مهندسی عمرانعضو هیئت علمی گروه مهندسی عمران دانشکده مهندسی دانشگاه شهید چمران اهوازDue to accuray of numerical methods and constitutive equations, a comparison of these methods with the classical methods of dynamic analysis of earthfill dams seems necessary. The results of Seed-Makdisi, Sarma and Ambrasys-Sarma analysis of a homogenous dam are compared with those of Quake/W and Slope/W softwares. A code is developed for calculating permanent displacements based on Newmark double integration method. The results of linear and equivalent linear models show that, due to unrealistic linear assumption of the behaviour of the material, the calculated accelerations are high and the analytical methods are overdesign. This is due to realistic constitutive models. Also, in homogenous dam, as the assumed critical wedge in analytical methods is different from that calculated in numerical analyses, the critical acceleration estimated is different too (0.45g in Ambrasys-Sarma method compared to 0.26g in equivalent linear model for a wedge of 0.6h depth). This shows that realistic models must be utilized. In the developed code first the average aceleration of assumed wedge is calculated using acceleration calculated with finite element codes utilizing modern constitutive models and consequently the permanent displacements are calculated. The results show that the current methods are overestimating. Also, the assumed critical wedges are unrealestic and pass through the dam core. While the critical wedges pass through downstream shell. The permanent displacement of a wedge with 0.6h depth is estimated to be 3 cm compared to zero in Sarma method. The developed code was used for dynamic analysis of Balarud earthfill dams.http://jise.scu.ac.ir/article_13184_1897970cf4b54817b16c04ed63cbc2ba.pdfdynamic analysisfinite elementearthfill damslinear elasticequivalent linear |
| spellingShingle | Masoud Oulapour Mohammad Amjad Zade Hosein Mohmmad vali samani A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam) علوم و مهندسی آبیاری dynamic analysis finite element earthfill dams linear elastic equivalent linear |
| title | A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam) |
| title_full | A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam) |
| title_fullStr | A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam) |
| title_full_unstemmed | A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam) |
| title_short | A Comparison of Numerical and Analytical Methods in Dynamic Analysis of Embankment Dams (Case Study Balarud Embankment dam) |
| title_sort | comparison of numerical and analytical methods in dynamic analysis of embankment dams case study balarud embankment dam |
| topic | dynamic analysis finite element earthfill dams linear elastic equivalent linear |
| url | http://jise.scu.ac.ir/article_13184_1897970cf4b54817b16c04ed63cbc2ba.pdf |
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