ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY
Reticular space structures are widely selected as cover for large spaces, and are also used as refuge spaces for earthquake hit areas. Space structures are light and highly indete...
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| Format: | Article |
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Sharif University of Technology
2017-02-01
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| Series: | مهندسی عمران شریف |
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| Online Access: | https://sjce.journals.sharif.edu/article_1074_8b7d0a29eb79c8e1c5f81643e2e24322.pdf |
| _version_ | 1797733833548759040 |
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| author | S. Ahmadzadeh A. Sadeghi |
| author_facet | S. Ahmadzadeh A. Sadeghi |
| author_sort | S. Ahmadzadeh |
| collection | DOAJ |
| description | Reticular space structures are widely selected as cover for large spaces, and are also used as refuge spaces for earthquake hit areas. Space structures are light and highly indeterminate and, for some time, these two properties caused researchers to take them as a-seismic structures. However, the 1995 Kobe earthquake in Japan showed that although space structures are safer than
conventional buildings, they are not completely a-seismic.Double layer grids (DLG) are one of the most frequently used types of space structure. The aim of this research is to introduce some relations for calculating the earthquake induced forces on these structures. The relations comprise of a) assessing the static equivalent vertical base shear of earthquake action on DLGs and b) assessing the distribution pattern of the vertical base shear on the nodes of these structures. These relations make assessment of the earthquake action on the double layer grids very easy and versatile.In this research, for assessment of the vertical equivalent static earthquake loading on double layer grids, a set of double layer grids are established. These grids have the same configuration but different dimensions. Also, five strong ground motions with high vertical components are selected. The acceleration records of the earthquakes are scaled for a very high seismic area. By numerous linear and nonlinear analyses, a formula for assessing the earthquake vertical base shear on DLGs is produced. Also, a set of equations for distribution of the base shear on the nodes of these structures is developed. In the final stage, the versatility of the equations is examined on some double layer grids, and a comparison is made with the results of the equations of the code of practice of China. It is shown that the introduced equations in this research make the DLGs safer against strong ground motions. |
| first_indexed | 2024-03-12T12:35:17Z |
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| id | doaj.art-791da6cf287e4f2699b05d84e9acd6c2 |
| institution | Directory Open Access Journal |
| issn | 2676-4768 2676-4776 |
| language | fas |
| last_indexed | 2024-03-12T12:35:17Z |
| publishDate | 2017-02-01 |
| publisher | Sharif University of Technology |
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| series | مهندسی عمران شریف |
| spelling | doaj.art-791da6cf287e4f2699b05d84e9acd6c22023-08-29T04:27:35ZfasSharif University of Technologyمهندسی عمران شریف2676-47682676-47762017-02-0132.24.23111074ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITYS. Ahmadzadeh0A. Sadeghi1Dept. of Civil Engineering Azarbaijan Shahid Madani UniversityDept. of Civil Engineering Azarbaijan Shahid Madani UniversityReticular space structures are widely selected as cover for large spaces, and are also used as refuge spaces for earthquake hit areas. Space structures are light and highly indeterminate and, for some time, these two properties caused researchers to take them as a-seismic structures. However, the 1995 Kobe earthquake in Japan showed that although space structures are safer than conventional buildings, they are not completely a-seismic.Double layer grids (DLG) are one of the most frequently used types of space structure. The aim of this research is to introduce some relations for calculating the earthquake induced forces on these structures. The relations comprise of a) assessing the static equivalent vertical base shear of earthquake action on DLGs and b) assessing the distribution pattern of the vertical base shear on the nodes of these structures. These relations make assessment of the earthquake action on the double layer grids very easy and versatile.In this research, for assessment of the vertical equivalent static earthquake loading on double layer grids, a set of double layer grids are established. These grids have the same configuration but different dimensions. Also, five strong ground motions with high vertical components are selected. The acceleration records of the earthquakes are scaled for a very high seismic area. By numerous linear and nonlinear analyses, a formula for assessing the earthquake vertical base shear on DLGs is produced. Also, a set of equations for distribution of the base shear on the nodes of these structures is developed. In the final stage, the versatility of the equations is examined on some double layer grids, and a comparison is made with the results of the equations of the code of practice of China. It is shown that the introduced equations in this research make the DLGs safer against strong ground motions.https://sjce.journals.sharif.edu/article_1074_8b7d0a29eb79c8e1c5f81643e2e24322.pdfequivalent static earthquake loadingcode of practice of chinadouble layer grida-seismicspace structures |
| spellingShingle | S. Ahmadzadeh A. Sadeghi ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY مهندسی عمران شریف equivalent static earthquake loading code of practice of china double layer grid a-seismic space structures |
| title | ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY |
| title_full | ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY |
| title_fullStr | ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY |
| title_full_unstemmed | ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY |
| title_short | ASSESSMENT OF EQUIVALENT STATIC EARTHQUAKE LOADINGS ON DLG AND THEIR VERSATILITY |
| title_sort | assessment of equivalent static earthquake loadings on dlg and their versatility |
| topic | equivalent static earthquake loading code of practice of china double layer grid a-seismic space structures |
| url | https://sjce.journals.sharif.edu/article_1074_8b7d0a29eb79c8e1c5f81643e2e24322.pdf |
| work_keys_str_mv | AT sahmadzadeh assessmentofequivalentstaticearthquakeloadingsondlgandtheirversatility AT asadeghi assessmentofequivalentstaticearthquakeloadingsondlgandtheirversatility |