Equivalent linear model for seismic damage evaluation of single-degree-of-freedom systems representing reinforced concrete structures considering cyclic degradation behavior

In this study, a novel equivalent damping ratio model that is suitable for reinforced concrete (RC) structures considering cyclic degradation behavior is developed, and a new equivalent linearization analysis method for implementing the proposed equivalent damping ratio model for use in seismic dama...

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Bibliographic Details
Published in:Earthquake Engineering and Engineering Vibration 2024-07, Vol.23 (3), p.637-648
Main Authors: Yan, Lulu, Yu, Ding-Hao
Format: Article
Language:English
Subjects:
Civil Engineering
Concrete structures
Control
Damage assessment
Damping ratio
Degradation
Degrees of freedom
Dynamical Systems
Earth and Environmental Science
Earth Sciences
Earthquake damage
Earthquake dampers
Energy dissipation
Energy exchange
Equivalence
Geotechnical Engineering & Applied Earth Sciences
Hysteresis
Linear systems
Linearization
Performance evaluation
Reinforced concrete
Seismic activity
Seismic response
Strain energy
Vibration
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Summary:In this study, a novel equivalent damping ratio model that is suitable for reinforced concrete (RC) structures considering cyclic degradation behavior is developed, and a new equivalent linearization analysis method for implementing the proposed equivalent damping ratio model for use in seismic damage evaluation is presented. To this end, Ibarra’s peak-oriented model, which incorporates an energy-based degradation rule, is selected for representing hysteretic behavior of RC structure, and the optimized equivalent damping for predicting the maximum displacement response is presented by using the empirical method, in which the effect of cyclic degradation is considered. Moreover, the relationship between the hysteretic energy dissipation of the inelastic system and the elastic strain energy of the equivalent linear system is established so that the proposed equivalent linear system can be directly integrated with the Park-Ang seismic model to implement seismic damage evaluation. Due to the simplicity of the equivalent linearization method, the proposed method provides an efficient and reliable way of obtaining comprehensive insight into the seismic performance of RC structures. The verification demonstrates the validity of the proposed method.
ISSN:1671-3664
1993-503X
DOI:10.1007/s11803-024-2262-8