Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation
In most cases, concrete arch dams in the presence of suitable abutments, have high bearing capacity and more appropriate safety regarding the cost aspects, when compared to the other types of dams. However, according to the dam failure statistics, site specific conditions and abutment instability ar...
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K. N. Toosi University of Technology
2021-03-01
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| Series: | Numerical Methods in Civil Engineering |
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| Online Access: | https://nmce.kntu.ac.ir/article_160521_540a51d15ac4ca0388d80fd9f3d4e1c3.pdf |
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| author | A. Ferdousi |
| author_facet | A. Ferdousi |
| author_sort | A. Ferdousi |
| collection | DOAJ |
| description | In most cases, concrete arch dams in the presence of suitable abutments, have high bearing capacity and more appropriate safety regarding the cost aspects, when compared to the other types of dams. However, according to the dam failure statistics, site specific conditions and abutment instability are the main factors of concrete dam’s failure. In this paper, the effects of two important factors on earthquake response of high arch dams are considered. These factors are: effects of contraction joints opening between the dam monoliths and appropriate rock foundation boundary conditions. Nonlinear seismic response of dam reservoir foundation system includes dam-canyon interaction, dam body contraction joint opening, discontinuities (sliding planes) of foundation rock and failure of the jointed rock and concrete materials. Therefore, a finite element program for nonlinear dynamic analysis of 3D dam reservoir foundation system was developed. Karun 4 Dam as a case study was analyzed and the results revealed the essential role of modeling discontinuities and boundary conditions of rock foundation under seismic excitation. Also, The results demonstrate that the contraction joint openings during strong earthquakes are substantial and greatly change the arch to cantilever stress distribution in the dam body. |
| format | Article |
| id | doaj-art-726e689022fa4f2b8ad61779f8b0fcf2 |
| institution | Kabale University |
| issn | 2345-4296 2783-3941 |
| language | English |
| publishDate | 2021-03-01 |
| publisher | K. N. Toosi University of Technology |
| record_format | Article |
| series | Numerical Methods in Civil Engineering |
| spelling | doaj-art-726e689022fa4f2b8ad61779f8b0fcf22024-12-20T08:32:48ZengK. N. Toosi University of TechnologyNumerical Methods in Civil Engineering2345-42962783-39412021-03-0153566610.52547/nmce.5.3.56160521Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundationA. Ferdousi0Assistant Professor, Department of Civil Engineering, Islamic Azad University, Tabriz Brunch, Tabriz, Iran.In most cases, concrete arch dams in the presence of suitable abutments, have high bearing capacity and more appropriate safety regarding the cost aspects, when compared to the other types of dams. However, according to the dam failure statistics, site specific conditions and abutment instability are the main factors of concrete dam’s failure. In this paper, the effects of two important factors on earthquake response of high arch dams are considered. These factors are: effects of contraction joints opening between the dam monoliths and appropriate rock foundation boundary conditions. Nonlinear seismic response of dam reservoir foundation system includes dam-canyon interaction, dam body contraction joint opening, discontinuities (sliding planes) of foundation rock and failure of the jointed rock and concrete materials. Therefore, a finite element program for nonlinear dynamic analysis of 3D dam reservoir foundation system was developed. Karun 4 Dam as a case study was analyzed and the results revealed the essential role of modeling discontinuities and boundary conditions of rock foundation under seismic excitation. Also, The results demonstrate that the contraction joint openings during strong earthquakes are substantial and greatly change the arch to cantilever stress distribution in the dam body.https://nmce.kntu.ac.ir/article_160521_540a51d15ac4ca0388d80fd9f3d4e1c3.pdfconcrete arch damnon-homogeneous and discontinuous rock foundationnonlinear dynamic analysisboundary conditionscontraction joints |
| spellingShingle | A. Ferdousi Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation Numerical Methods in Civil Engineering concrete arch dam non-homogeneous and discontinuous rock foundation nonlinear dynamic analysis boundary conditions contraction joints |
| title | Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation |
| title_full | Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation |
| title_fullStr | Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation |
| title_full_unstemmed | Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation |
| title_short | Nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation |
| title_sort | nonlinear seismic response of arch dams considering joint opening effects and boundary conditions of discontinuous foundation |
| topic | concrete arch dam non-homogeneous and discontinuous rock foundation nonlinear dynamic analysis boundary conditions contraction joints |
| url | https://nmce.kntu.ac.ir/article_160521_540a51d15ac4ca0388d80fd9f3d4e1c3.pdf |
| work_keys_str_mv | AT aferdousi nonlinearseismicresponseofarchdamsconsideringjointopeningeffectsandboundaryconditionsofdiscontinuousfoundation |