A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Methods for Determining the Key Parameters of Elastoplastic Seismic Isolators
https://orcid.org/http://orcid.org/0000-0003-3544-3832
Elastoplastic dampers (EPD) have found a wide application all over the world as standalone seismic restraints or elements of structural seismic isolation systems. This paper proposes a series of methodologies for determining the key parameters of the elastoplastic dampers, which involve the actuation force, force diagram, and the number of operating cycles. These methods build on the laws governing the variation of resistance forces in an EPD, the former being intricately dependent on plastic elements’ previous exposure to stress, as well as on the properties of steels they are made of. The paper further discusses the rigid-plastic and elastoplastic analyses, the pseudorigidity method algorithm, and the macromodel method, presenting analytical dependencies for simplest damper designs, as well as analytical and semi-analytical dependencies for the general-independent force curves of rectilinear element with rectangular cross-section, quarter-circle element, hardened elastoplastic material, and samples with circular cross-section. Examples are provided of the application of the proposed techniques, as well of experimental studies into the mechanical properties of elastoplastic elements. The proposed methods allow for a more comprehensive approach to calculating the design of the elastoplastic dampers for use in seismic protection systems.
Methods for Determining the Key Parameters of Elastoplastic Seismic Isolators
https://orcid.org/http://orcid.org/0000-0003-3544-3832
Elastoplastic dampers (EPD) have found a wide application all over the world as standalone seismic restraints or elements of structural seismic isolation systems. This paper proposes a series of methodologies for determining the key parameters of the elastoplastic dampers, which involve the actuation force, force diagram, and the number of operating cycles. These methods build on the laws governing the variation of resistance forces in an EPD, the former being intricately dependent on plastic elements’ previous exposure to stress, as well as on the properties of steels they are made of. The paper further discusses the rigid-plastic and elastoplastic analyses, the pseudorigidity method algorithm, and the macromodel method, presenting analytical dependencies for simplest damper designs, as well as analytical and semi-analytical dependencies for the general-independent force curves of rectilinear element with rectangular cross-section, quarter-circle element, hardened elastoplastic material, and samples with circular cross-section. Examples are provided of the application of the proposed techniques, as well of experimental studies into the mechanical properties of elastoplastic elements. The proposed methods allow for a more comprehensive approach to calculating the design of the elastoplastic dampers for use in seismic protection systems.
Methods for Determining the Key Parameters of Elastoplastic Seismic Isolators
https://orcid.org/http://orcid.org/0000-0003-3544-3832
Elastoplastic dampers (EPD) have found a wide application all over the world as standalone seismic restraints or elements of structural seismic isolation systems. This paper proposes a series of methodologies for determining the key parameters of the elastoplastic dampers, which involve the actuation force, force diagram, and the number of operating cycles. These methods build on the laws governing the variation of resistance forces in an EPD, the former being intricately dependent on plastic elements’ previous exposure to stress, as well as on the properties of steels they are made of. The paper further discusses the rigid-plastic and elastoplastic analyses, the pseudorigidity method algorithm, and the macromodel method, presenting analytical dependencies for simplest damper designs, as well as analytical and semi-analytical dependencies for the general-independent force curves of rectilinear element with rectangular cross-section, quarter-circle element, hardened elastoplastic material, and samples with circular cross-section. Examples are provided of the application of the proposed techniques, as well of experimental studies into the mechanical properties of elastoplastic elements. The proposed methods allow for a more comprehensive approach to calculating the design of the elastoplastic dampers for use in seismic protection systems.
Methods for Determining the Key Parameters of Elastoplastic Seismic Isolators
Lecture Notes in Civil Engineering
Sadan, Bahadir (editor) / Tuzun, Cuneyt (editor) / Erdik, Mustafa (editor) / Ostrovskaya, Nadezhda Vladimirovna (author) / Rutman, Yuriy Lazarevich (author)
World Conference on Seismic Isolation ; 2023 ; Antalya, Türkiye
Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures ; Chapter: 4 ; 39-56
2024-09-29
18 pages
Article/Chapter (Book)
Electronic Resource
English
elastoplastic seismic isolators , rigid-plastic model , pseudorigidity method , elastoplastic model , macromodel Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Fire Science, Hazard Control, Building Safety , Building Construction and Design , Cultural Heritage
| British Library Online Contents | 1994
"Biaxiality Effect" on the Energy Dissipated by Elastoplastic Base-Isolators
| Online Contents | 2003
Mathematical modeling of seismic isolators
| British Library Conference Proceedings | 1991
Elastomeric seismic protection isolators for bridges
| Tema Archive | 2012
Seismic Isolators in Pile-Supported Wharves
| ASCE | 2013