VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS
In recent years, due to the growing demand for high-rise structures, the use of soil-nailed walls has become increasingly common, particularly as a basement to provide sufficient pa...
| Κύριοι συγγραφείς: | , |
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| Μορφή: | Άρθρο |
| Γλώσσα: | fas |
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Sharif University of Technology
2016-11-01
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| Σειρά: | مهندسی عمران شریف |
| Θέματα: | |
| Διαθέσιμο Online: | https://sjce.journals.sharif.edu/article_1038_f3d8186a387d9bbb19f5065d85c5e8e8.pdf |
| _version_ | 1827856960328826880 |
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| author | A. KomakPanah S. Majidian |
| author_facet | A. KomakPanah S. Majidian |
| author_sort | A. KomakPanah |
| collection | DOAJ |
| description | In recent years, due to the growing demand for high-rise structures, the use of soil-nailed walls has become increasingly common, particularly as a basement to provide sufficient parking space. However, the main concern when using soil-nailed cuts in high-seismicity regions is the performance of soil-nailed excavations during seismic loading. It is necessary to study the seismic
performance of nailed structures for optimum design and it is useful to study displacement seismic design with a focus on displacement, instead of force, as the direct performance or damage indicator, to achieve these objectives.A method is proposed to evaluate the seismic deformation of soil reinforced structures using a combination of nonlinear static analysis of MDOF models and dynamic analysis of a 2DOF system. A computer program for dynamic analysis of nonlinear 2DOF systems was developed, in which seismic deformations of soil reinforced structures can be calculated. Two force-displacement relations, obtained from nonlinear static analysis, describe the characteristics of the whole structure and are used as the nonlinear stiffness of the 2DOF springs. Nonlinear static analysis was performed by applying a vertical load pattern behind the reinforced block and on the surface of the multi-degree of freedom model. Contours of the horizontal displacement and plastic strain from static nonlinear analyses are compared with the seismic failure mechanism of soil-nailed structures. Deformation of the soil nailed walls obtained from full
dynamic analysis was used as a reference solution to ascertain the accuracy of the results given by the proposed method. Two soil-nailed structures were considered as case studies. 1940 El Centro and 1989 Loma Prieta were used to excite the models.A reasonable match was found between the results of the proposed method and fully dynamic analysis of the problem. The proposed method may be used effectively to perform a broad suite of parametric studies at the design stage. The above procedure can also provide a hybrid experimental and numerical tool for earthquake impact assessment of soil-reinforced retaining structures. |
| first_indexed | 2024-03-12T12:34:52Z |
| format | Article |
| id | doaj.art-1c0e40de5e734d0c99b253d1a52e8c01 |
| institution | Directory Open Access Journal |
| issn | 2676-4768 2676-4776 |
| language | fas |
| last_indexed | 2024-03-12T12:34:52Z |
| publishDate | 2016-11-01 |
| publisher | Sharif University of Technology |
| record_format | Article |
| series | مهندسی عمران شریف |
| spelling | doaj.art-1c0e40de5e734d0c99b253d1a52e8c012023-08-29T04:28:29ZfasSharif University of Technologyمهندسی عمران شریف2676-47682676-47762016-11-0132.23.11071161038VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONSA. KomakPanah0S. Majidian1Dept. of Civil and Environmental Engineering Tarbiat Modares UniversityDept. of Civil and Environmental Engineering Tarbiat Modares UniversityIn recent years, due to the growing demand for high-rise structures, the use of soil-nailed walls has become increasingly common, particularly as a basement to provide sufficient parking space. However, the main concern when using soil-nailed cuts in high-seismicity regions is the performance of soil-nailed excavations during seismic loading. It is necessary to study the seismic performance of nailed structures for optimum design and it is useful to study displacement seismic design with a focus on displacement, instead of force, as the direct performance or damage indicator, to achieve these objectives.A method is proposed to evaluate the seismic deformation of soil reinforced structures using a combination of nonlinear static analysis of MDOF models and dynamic analysis of a 2DOF system. A computer program for dynamic analysis of nonlinear 2DOF systems was developed, in which seismic deformations of soil reinforced structures can be calculated. Two force-displacement relations, obtained from nonlinear static analysis, describe the characteristics of the whole structure and are used as the nonlinear stiffness of the 2DOF springs. Nonlinear static analysis was performed by applying a vertical load pattern behind the reinforced block and on the surface of the multi-degree of freedom model. Contours of the horizontal displacement and plastic strain from static nonlinear analyses are compared with the seismic failure mechanism of soil-nailed structures. Deformation of the soil nailed walls obtained from full dynamic analysis was used as a reference solution to ascertain the accuracy of the results given by the proposed method. Two soil-nailed structures were considered as case studies. 1940 El Centro and 1989 Loma Prieta were used to excite the models.A reasonable match was found between the results of the proposed method and fully dynamic analysis of the problem. The proposed method may be used effectively to perform a broad suite of parametric studies at the design stage. The above procedure can also provide a hybrid experimental and numerical tool for earthquake impact assessment of soil-reinforced retaining structures.https://sjce.journals.sharif.edu/article_1038_f3d8186a387d9bbb19f5065d85c5e8e8.pdfsoil-reinforced. soil-nailed. dynamic analysis. nonlinear static analysis |
| spellingShingle | A. KomakPanah S. Majidian VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS مهندسی عمران شریف soil-reinforced. soil-nailed. dynamic analysis. nonlinear static analysis |
| title | VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS |
| title_full | VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS |
| title_fullStr | VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS |
| title_full_unstemmed | VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS |
| title_short | VERIFICATION OF A STATIC NONLINEAR ANALYSIS METHOD FOR ESTIMATION OF SOIL-NAILED RETAINING WALLS SEISMIC DEFORMATIONS |
| title_sort | verification of a static nonlinear analysis method for estimation of soil nailed retaining walls seismic deformations |
| topic | soil-reinforced. soil-nailed. dynamic analysis. nonlinear static analysis |
| url | https://sjce.journals.sharif.edu/article_1038_f3d8186a387d9bbb19f5065d85c5e8e8.pdf |
| work_keys_str_mv | AT akomakpanah verificationofastaticnonlinearanalysismethodforestimationofsoilnailedretainingwallsseismicdeformations AT smajidian verificationofastaticnonlinearanalysismethodforestimationofsoilnailedretainingwallsseismicdeformations |