Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter
The coupling of frame structures with external oscillating bodies, such as rigid walls, dynamic mass absorbers, elastoplastic dampers, or tuned mass dampers, can be effective in reducing the displacements of the structure and protecting it against seismic loads. This paper proposes connecting an ext...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/8/5017 |
| _version_ | 1797606502713786368 |
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| author | Angelo Di Egidio Alessandro Contento |
| author_facet | Angelo Di Egidio Alessandro Contento |
| author_sort | Angelo Di Egidio |
| collection | DOAJ |
| description | The coupling of frame structures with external oscillating bodies, such as rigid walls, dynamic mass absorbers, elastoplastic dampers, or tuned mass dampers, can be effective in reducing the displacements of the structure and protecting it against seismic loads. This paper proposes connecting an external oscillating body to the first story of a frame structure and studying the effectiveness of the coupling by evaluating the reduction in the displacements of the frame structure. The inertial effects of the oscillating body are increased by introducing a virtual mass, provided by an inerter device. The oscillating body, characterized by physical and virtual masses, is connected to the frame structure through a hysteretic device. The study is performed on a dynamically equivalent three-degree-of-freedom (3-DOF) model, whose equations are written using a direct approach. To verify the effectiveness of the protection device, named hysteretic mass damper inerter (HMDI), in reducing the displacements of the frame structure, the displacement of the first story and the drifts of the upper stories are compared to those of the frame structure not connected to the external oscillating body. An initial spectral analysis, performed on the linearized mechanical system, clarifies the role of the parameters of the external device in the dynamic behavior of the coupled system. An additional seismic analysis is performed by using three single earthquake records first, and then a set of seven additional earthquake records selected to be compatible with the design spectrum of Los Angeles. Specific spectral gain maps are used to organize the results of an extensive parametric analysis. They show that the HMDI reduces both displacements and drifts of the structure in large ranges of the parameters that characterize the HMDI. It is found that the proposed protection method is particularly effective for low- and medium-rise frame structures. |
| first_indexed | 2024-03-11T05:16:06Z |
| format | Article |
| id | doaj.art-8ef6aa8f0d94493899f3efee1d4f4f17 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T05:16:06Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-8ef6aa8f0d94493899f3efee1d4f4f172023-11-17T18:12:32ZengMDPI AGApplied Sciences2076-34172023-04-01138501710.3390/app13085017Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper InerterAngelo Di Egidio0Alessandro Contento1Department of Civil, Construction-Architectural and Environmental Engineering, University of L’Aquila, 67100 L’Aquila, ItalyCollege of Engineering, Fuzhou University, Fuzhou 350025, ChinaThe coupling of frame structures with external oscillating bodies, such as rigid walls, dynamic mass absorbers, elastoplastic dampers, or tuned mass dampers, can be effective in reducing the displacements of the structure and protecting it against seismic loads. This paper proposes connecting an external oscillating body to the first story of a frame structure and studying the effectiveness of the coupling by evaluating the reduction in the displacements of the frame structure. The inertial effects of the oscillating body are increased by introducing a virtual mass, provided by an inerter device. The oscillating body, characterized by physical and virtual masses, is connected to the frame structure through a hysteretic device. The study is performed on a dynamically equivalent three-degree-of-freedom (3-DOF) model, whose equations are written using a direct approach. To verify the effectiveness of the protection device, named hysteretic mass damper inerter (HMDI), in reducing the displacements of the frame structure, the displacement of the first story and the drifts of the upper stories are compared to those of the frame structure not connected to the external oscillating body. An initial spectral analysis, performed on the linearized mechanical system, clarifies the role of the parameters of the external device in the dynamic behavior of the coupled system. An additional seismic analysis is performed by using three single earthquake records first, and then a set of seven additional earthquake records selected to be compatible with the design spectrum of Los Angeles. Specific spectral gain maps are used to organize the results of an extensive parametric analysis. They show that the HMDI reduces both displacements and drifts of the structure in large ranges of the parameters that characterize the HMDI. It is found that the proposed protection method is particularly effective for low- and medium-rise frame structures.https://www.mdpi.com/2076-3417/13/8/5017frame structurehysteretic mass damperinerter devicedynamic and seismic performance |
| spellingShingle | Angelo Di Egidio Alessandro Contento Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter Applied Sciences frame structure hysteretic mass damper inerter device dynamic and seismic performance |
| title | Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter |
| title_full | Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter |
| title_fullStr | Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter |
| title_full_unstemmed | Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter |
| title_short | Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter |
| title_sort | seismic benefits from coupling frame structures with a hysteretic mass damper inerter |
| topic | frame structure hysteretic mass damper inerter device dynamic and seismic performance |
| url | https://www.mdpi.com/2076-3417/13/8/5017 |
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