Structural Functionality Evaluation Based on Natural Frequency Measurement
Publication: Journal of Structural Engineering
Volume 149, Issue 7
Abstract
A method to calculate structural functionality for building structures based on structural natural frequency was proposed for seismic loading events. Structural functionality loss and recovery were determined by monitoring the change of structural natural frequency during the earthquake events or repair activities. A shape factor was introduced, structural functionality recovery function (SFRF), to consider the repair strategy and repair speed. As an example, this method was applied to obtain the structural functionality curve and seismic resilience of a half scale two-story reinforced concrete (RC) frame structure. This structure was subjected to a series of ground motions on a shake table and then repaired by carbon fiber cloth a total of four times. The results indicate that the SFRF is able to capture the recovery trend of a structure in the repair process. Meanwhile, a damage index-repair target (DI-RT) curve, representing the 5% difference between the proposed and traditional SFRFs, was used to investigate the impact of structural damage degree and repair target. The areas above the curve indicates that the difference between the proposed and traditional SFRFs cannot be ignored.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work is supported by the Major project of the National Natural Science Foundation of China (Project No. 52090082), the National Natural Science Foundation of China Youth Project (Project No. 51908205), and the Training Program for Excellent Young Innovators of Changsha (Project No. kq2107010).
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Published In
Journal of Structural Engineering
Volume 149 • Issue 7 • July 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 27, 2022
Accepted: Feb 13, 2023
Published online: Apr 28, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 28, 2023
ASCE Technical Topics:
- Concrete
- Concrete frames
- Concrete structures
- Construction engineering
- Construction methods
- Continuum mechanics
- Curvature
- Dynamics (solid mechanics)
- Earthquake engineering
- Earthquake resistant structures
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Frames
- Geometry
- Geotechnical engineering
- Materials engineering
- Mathematics
- Motion (dynamics)
- Natural frequency
- Oscillations
- Rehabilitation
- Reinforced concrete
- Seismic tests
- Solid mechanics
- Structural engineering
- Structural members
- Structural systems
- Structures (by type)
- Tests (by type)
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