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Influence of Characteristics of Seismic Excitations on the Performance of Negative Stiffness and Inerter Based Systems for Apparent Weakening of Structures
https://orcid.org/http://orcid.org/0009-0005-7615-5839
https://orcid.org/http://orcid.org/0000-0003-2595-4161
https://orcid.org/http://orcid.org/0000-0003-4442-8087
Structures have effectively incorporated passive energy dissipation or supplemental damping systems to reduce excessive vibrations caused by seismic excitation. Negative stiffness devices (NSDs) and inerter-based devices are two passive device types that are gaining popularity in the field of vibration isolation and suppression because they both help to lower structure’s natural frequency, which in turn helps to regulate the acceleration of the structure. Despite their similarities, the mechanical behaviour of these two passive devices clearly differs from one another. NSD can produce a force that is in the same direction of induced displacement and would alter the stiffness of structure-device assembly, thus generating apparent yielding. Inerter-based device is a vibration control device which achieves a large inertance-to-mass ratio. This study attempts to illustrate the effectiveness of a single degree of freedom (SDOF) structure-NSD and SDOF structure-inerter assembly in response reduction in a better perspective. The variability in the seismic input is considered by choosing a wider range of earthquake ground movements that include both near-fault (NF) and far-fault (FF) records. The study indicates that the response control of the SDOF structure is highly dependent on the characteristics of the input earthquake ground motion.
Influence of Characteristics of Seismic Excitations on the Performance of Negative Stiffness and Inerter Based Systems for Apparent Weakening of Structures
https://orcid.org/http://orcid.org/0009-0005-7615-5839
https://orcid.org/http://orcid.org/0000-0003-2595-4161
https://orcid.org/http://orcid.org/0000-0003-4442-8087
Structures have effectively incorporated passive energy dissipation or supplemental damping systems to reduce excessive vibrations caused by seismic excitation. Negative stiffness devices (NSDs) and inerter-based devices are two passive device types that are gaining popularity in the field of vibration isolation and suppression because they both help to lower structure’s natural frequency, which in turn helps to regulate the acceleration of the structure. Despite their similarities, the mechanical behaviour of these two passive devices clearly differs from one another. NSD can produce a force that is in the same direction of induced displacement and would alter the stiffness of structure-device assembly, thus generating apparent yielding. Inerter-based device is a vibration control device which achieves a large inertance-to-mass ratio. This study attempts to illustrate the effectiveness of a single degree of freedom (SDOF) structure-NSD and SDOF structure-inerter assembly in response reduction in a better perspective. The variability in the seismic input is considered by choosing a wider range of earthquake ground movements that include both near-fault (NF) and far-fault (FF) records. The study indicates that the response control of the SDOF structure is highly dependent on the characteristics of the input earthquake ground motion.
Influence of Characteristics of Seismic Excitations on the Performance of Negative Stiffness and Inerter Based Systems for Apparent Weakening of Structures
https://orcid.org/http://orcid.org/0009-0005-7615-5839
https://orcid.org/http://orcid.org/0000-0003-2595-4161
https://orcid.org/http://orcid.org/0000-0003-4442-8087
Structures have effectively incorporated passive energy dissipation or supplemental damping systems to reduce excessive vibrations caused by seismic excitation. Negative stiffness devices (NSDs) and inerter-based devices are two passive device types that are gaining popularity in the field of vibration isolation and suppression because they both help to lower structure’s natural frequency, which in turn helps to regulate the acceleration of the structure. Despite their similarities, the mechanical behaviour of these two passive devices clearly differs from one another. NSD can produce a force that is in the same direction of induced displacement and would alter the stiffness of structure-device assembly, thus generating apparent yielding. Inerter-based device is a vibration control device which achieves a large inertance-to-mass ratio. This study attempts to illustrate the effectiveness of a single degree of freedom (SDOF) structure-NSD and SDOF structure-inerter assembly in response reduction in a better perspective. The variability in the seismic input is considered by choosing a wider range of earthquake ground movements that include both near-fault (NF) and far-fault (FF) records. The study indicates that the response control of the SDOF structure is highly dependent on the characteristics of the input earthquake ground motion.
Influence of Characteristics of Seismic Excitations on the Performance of Negative Stiffness and Inerter Based Systems for Apparent Weakening of Structures
Lecture Notes in Civil Engineering
Nehdi, Moncef (editor) / Hung, Mo Kim (editor) / Venkataramana, Katta (editor) / Antony, Jiji (editor) / Kavitha, P. E. (editor) / Beena B R (editor) / Ahamed, Aayisha S. (author) / Sajith, A. S. (author) / Azeem, M. (author)
International Conference on Structural Engineering and Construction Management ; 2023 ; Angamaly, India
2023-11-03
9 pages
Article/Chapter (Book)
Electronic Resource
English
Seismic Performance of SDOF System with a Negative Stiffness-Inerter System
| Springer Verlag | 2022