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Evaluation of degrading hysteresis on RC structures retrofitted with energy dissipating systems

Evaluation of degrading hysteresis on RC structures retrofitted with energy dissipating systems Passive control devices are currently used in several countries to improve the seismic response of structures. These novel technologies include energy dissipating systems to increase the energy dissipating capacity of modern and heritage buildings but not always reduces completely the expected damages. A parametric study directed to determine the importance of the strength and stiffness degradation in reinforced concrete structures retrofitted with metallic energy dissipation devices, located in soft soil sites is carried out. Nonlinear time-history analyses of equivalent single-degree-of-freedom systems with periods in the range of low-, medium- and tall-rise buildings are summarized. Three variations of the basic model are selected, namely: moment resisting frame, frame with energy dissipating devices and braced frame. Push-over analysis of the building models are conducted to obtain equivalent single-degree-of-freedom systems. To quantify the importance of the strength and stiffness degradation in the response of the structures, four parameters of the hysteretic rules that denote small, medium and large degradation are selected. Large degradation is expected in old existing structures with pathologies accumulated during their useful life. All structural models were subjected to a suite of ground motions recorded in soft soil sites of Mexico City. Results based on the analysis of damage indices show that the strength and stiffness degradation are more relevant in structures with energy dissipating devices when the fundamental period of the model is close to the predominant period of the ground motion. The seismic response also showed the relevance of the brace-energy dissipating device stiffness on the expected damage of the buildings. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Evaluation of degrading hysteresis on RC structures retrofitted with energy dissipating systems

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References (32)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-023-00303-4
Publisher site
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Abstract

Passive control devices are currently used in several countries to improve the seismic response of structures. These novel technologies include energy dissipating systems to increase the energy dissipating capacity of modern and heritage buildings but not always reduces completely the expected damages. A parametric study directed to determine the importance of the strength and stiffness degradation in reinforced concrete structures retrofitted with metallic energy dissipation devices, located in soft soil sites is carried out. Nonlinear time-history analyses of equivalent single-degree-of-freedom systems with periods in the range of low-, medium- and tall-rise buildings are summarized. Three variations of the basic model are selected, namely: moment resisting frame, frame with energy dissipating devices and braced frame. Push-over analysis of the building models are conducted to obtain equivalent single-degree-of-freedom systems. To quantify the importance of the strength and stiffness degradation in the response of the structures, four parameters of the hysteretic rules that denote small, medium and large degradation are selected. Large degradation is expected in old existing structures with pathologies accumulated during their useful life. All structural models were subjected to a suite of ground motions recorded in soft soil sites of Mexico City. Results based on the analysis of damage indices show that the strength and stiffness degradation are more relevant in structures with energy dissipating devices when the fundamental period of the model is close to the predominant period of the ground motion. The seismic response also showed the relevance of the brace-energy dissipating device stiffness on the expected damage of the buildings.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Jun 1, 2023

Keywords: Energy dissipating devices; Damaged buildings; Strength degradation; Stiffness degradation; Soft soils

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