Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces
Irregular structures have special seismic performance during earthquakes. Major irregularities in structural standards include geometric, torsional, diaphragm, out-of-plane and non-parallel. In the present paper, 5, 8 and 11-story steel structures with mass and height irregularities were modeled wit...
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Pouyan Press
2023-10-01
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| Series: | Computational Engineering and Physical Modeling |
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| Online Access: | https://www.jcepm.com/article_192612_e9716c5ff3b69760e2a3a31486927e49.pdf |
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| author | Masoud Mahdavi Abbas Babaafjaei Seyyed Reza Hosseini |
| author_facet | Masoud Mahdavi Abbas Babaafjaei Seyyed Reza Hosseini |
| author_sort | Masoud Mahdavi |
| collection | DOAJ |
| description | Irregular structures have special seismic performance during earthquakes. Major irregularities in structural standards include geometric, torsional, diaphragm, out-of-plane and non-parallel. In the present paper, 5, 8 and 11-story steel structures with mass and height irregularities were modeled with SAP2000 software. The structures were subjected to 11 scaled earthquakes (near and far-fault) by nonlinear time history analysis method (direct integration). Steel structures have three types of concentrically braces including Gate, Inverted V and Knee. The results showed that the Knee brace has the best performance in the acceleration and displacement parameters of the structure. Inverted V brace has the best performance in shear force parameter. The average displacement reduction of irregular steel structures (5, 8 and 11-story) with Gate, Inverted V and Knee braces is 39.26%, 23.15%, and 49.65%, respectively. The average acceleration reduction of irregular steel structures (5, 8 and 11-story) with Gate, Inverted V and Knee braces is 28.56%, 17.23%, and 45.98%, respectively. The average reduction of column shear force in irregular steel structures (5, 8 and 11-story) with Gate, Inverted V and Knee braces is 14.11%, 24.48%, and 9.51%, respectively. |
| format | Article |
| id | doaj-art-e69521caeb50498ebece5ce9261c44cb |
| institution | OA Journals |
| issn | 2588-6959 |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Pouyan Press |
| record_format | Article |
| series | Computational Engineering and Physical Modeling |
| spelling | doaj-art-e69521caeb50498ebece5ce9261c44cb2025-08-20T02:01:25ZengPouyan PressComputational Engineering and Physical Modeling2588-69592023-10-0164577610.22115/cepm.2024.434360.1277192612Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically BracesMasoud Mahdavi0Abbas Babaafjaei1Seyyed Reza Hosseini2Ph.D. Student, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, IranM.Sc. Student, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, IranM.Sc. Student, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, IranIrregular structures have special seismic performance during earthquakes. Major irregularities in structural standards include geometric, torsional, diaphragm, out-of-plane and non-parallel. In the present paper, 5, 8 and 11-story steel structures with mass and height irregularities were modeled with SAP2000 software. The structures were subjected to 11 scaled earthquakes (near and far-fault) by nonlinear time history analysis method (direct integration). Steel structures have three types of concentrically braces including Gate, Inverted V and Knee. The results showed that the Knee brace has the best performance in the acceleration and displacement parameters of the structure. Inverted V brace has the best performance in shear force parameter. The average displacement reduction of irregular steel structures (5, 8 and 11-story) with Gate, Inverted V and Knee braces is 39.26%, 23.15%, and 49.65%, respectively. The average acceleration reduction of irregular steel structures (5, 8 and 11-story) with Gate, Inverted V and Knee braces is 28.56%, 17.23%, and 45.98%, respectively. The average reduction of column shear force in irregular steel structures (5, 8 and 11-story) with Gate, Inverted V and Knee braces is 14.11%, 24.48%, and 9.51%, respectively.https://www.jcepm.com/article_192612_e9716c5ff3b69760e2a3a31486927e49.pdfirregular steel structuresconcentrically bracesnonlinear time history analysisseismic performancecode 2800 |
| spellingShingle | Masoud Mahdavi Abbas Babaafjaei Seyyed Reza Hosseini Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces Computational Engineering and Physical Modeling irregular steel structures concentrically braces nonlinear time history analysis seismic performance code 2800 |
| title | Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces |
| title_full | Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces |
| title_fullStr | Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces |
| title_full_unstemmed | Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces |
| title_short | Evaluation and Comparison of Seismic Performance in Irregular Steel Structures with Modern Concentrically Braces |
| title_sort | evaluation and comparison of seismic performance in irregular steel structures with modern concentrically braces |
| topic | irregular steel structures concentrically braces nonlinear time history analysis seismic performance code 2800 |
| url | https://www.jcepm.com/article_192612_e9716c5ff3b69760e2a3a31486927e49.pdf |
| work_keys_str_mv | AT masoudmahdavi evaluationandcomparisonofseismicperformanceinirregularsteelstructureswithmodernconcentricallybraces AT abbasbabaafjaei evaluationandcomparisonofseismicperformanceinirregularsteelstructureswithmodernconcentricallybraces AT seyyedrezahosseini evaluationandcomparisonofseismicperformanceinirregularsteelstructureswithmodernconcentricallybraces |