An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings
In this paper, an original analytical formulation to evaluate the natural frequencies and mode shapes of high-rise buildings is proposed. The methodology is intended to be used by engineers in the preliminary design phases as it allows the evaluation of the dynamic response of high-rise buildings co...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2021-08-01
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| Series: | Curved and Layered Structures |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/cls-2021-0025 |
| _version_ | 1828960796459139072 |
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| author | Nitti Giuseppe Lacidogna Giuseppe Carpinteri Alberto |
| author_facet | Nitti Giuseppe Lacidogna Giuseppe Carpinteri Alberto |
| author_sort | Nitti Giuseppe |
| collection | DOAJ |
| description | In this paper, an original analytical formulation to evaluate the natural frequencies and mode shapes of high-rise buildings is proposed. The methodology is intended to be used by engineers in the preliminary design phases as it allows the evaluation of the dynamic response of high-rise buildings consisting of thin-walled closed- or open-section shear walls, frames, framed tubes, and dia-grid systems. If thin-walled open-section shear walls are present, the stiffness matrix of the element is evaluated considering Vlasov’s theory. Using the procedure called General Algorithm, which allows to assemble the stiffness matrices of the individual vertical bracing elements, it is possible to model the structure as a single equivalent cantilever beam. Furthermore, the degrees of freedom of the structural system are reduced to only three per floor: two translations in the x and y directions and a rigid rotation of the floor around the vertical axis of the building. This results in a drastic reduction in calculation times compared to those necessary to carry out the same analysis using commercial software that implements Finite Element models. The potential of the proposed method is confirmed by a numerical example, which demonstrates the benefits of this procedure. |
| first_indexed | 2024-12-14T09:32:39Z |
| format | Article |
| id | doaj.art-a0aa422be05441bd8954f3b14b6b2d60 |
| institution | Directory Open Access Journal |
| issn | 2353-7396 |
| language | English |
| last_indexed | 2024-12-14T09:32:39Z |
| publishDate | 2021-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Curved and Layered Structures |
| spelling | doaj.art-a0aa422be05441bd8954f3b14b6b2d602022-12-21T23:08:01ZengDe GruyterCurved and Layered Structures2353-73962021-08-018130731810.1515/cls-2021-0025An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildingsNitti Giuseppe0Lacidogna Giuseppe1Carpinteri Alberto2Politecnico di Torino, Department of Structural, Geotechnical and Building Engineering, Corso Duca degli Abruzzi 24, 10129Torino, ItalyPolitecnico di Torino, Department of Structural, Geotechnical and Building Engineering, Corso Duca degli Abruzzi 24, 10129Torino, ItalyPolitecnico di Torino, Department of Structural, Geotechnical and Building Engineering, Corso Duca degli Abruzzi 24, 10129Torino, Italy; Shantou University, Department of Civil and Environmental Engineering, Zhujiang (Pearl River) Professor of Guangdong Province, Shantou, P.R.ChinaIn this paper, an original analytical formulation to evaluate the natural frequencies and mode shapes of high-rise buildings is proposed. The methodology is intended to be used by engineers in the preliminary design phases as it allows the evaluation of the dynamic response of high-rise buildings consisting of thin-walled closed- or open-section shear walls, frames, framed tubes, and dia-grid systems. If thin-walled open-section shear walls are present, the stiffness matrix of the element is evaluated considering Vlasov’s theory. Using the procedure called General Algorithm, which allows to assemble the stiffness matrices of the individual vertical bracing elements, it is possible to model the structure as a single equivalent cantilever beam. Furthermore, the degrees of freedom of the structural system are reduced to only three per floor: two translations in the x and y directions and a rigid rotation of the floor around the vertical axis of the building. This results in a drastic reduction in calculation times compared to those necessary to carry out the same analysis using commercial software that implements Finite Element models. The potential of the proposed method is confirmed by a numerical example, which demonstrates the benefits of this procedure.https://doi.org/10.1515/cls-2021-0025high-rise buildingsdynamic modal analysisgeneral algorithmvlasov’s theory |
| spellingShingle | Nitti Giuseppe Lacidogna Giuseppe Carpinteri Alberto An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings Curved and Layered Structures high-rise buildings dynamic modal analysis general algorithm vlasov’s theory |
| title | An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings |
| title_full | An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings |
| title_fullStr | An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings |
| title_full_unstemmed | An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings |
| title_short | An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings |
| title_sort | analytical formulation to evaluate natural frequencies and mode shapes of high rise buildings |
| topic | high-rise buildings dynamic modal analysis general algorithm vlasov’s theory |
| url | https://doi.org/10.1515/cls-2021-0025 |
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