A new damage index for reinforced concrete structures

Cao, V. V., Ronagh, H. R., Ashraf, M. and Baji, H. (2014) A new damage index for reinforced concrete structures. Earthquake and Structures, 6 6: 581-609. doi:10.12989/eas.2014.6.6.581

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Author Cao, V. V.
Ronagh, H. R.
Ashraf, M.
Baji, H.
Title A new damage index for reinforced concrete structures
Journal name Earthquake and Structures
ISSN 2092-7622
2092-7614
Publication date 2014-01-01
Sub-type Article (original research)
DOI 10.12989/eas.2014.6.6.581
Volume 6
Issue 6
Start page 581
End page 609
Total pages 29
Place of publication Daejeon, Republic of Korea
Publisher Techno Press
Collection year 2015
Language eng
Abstract Reinforced concrete (RC) structures are likely to experience damage when subjected to earthquakes. Damage index (DI) has been recognised as an advanced tool of quantitatively expressing the extent of damage in such structures. Last 30 years have seen many concepts for DI proposed in order to calibrate the observed levels of damage. The current research briefly reviews all available concepts and investigates their relative merits and limitations with a view to proposing a new concept based on residual deformation. Currently available DIs are classified into two broad categories - non-cumulative DI and cumulative DI. Non-cumulative DIs do not include the effects of cyclic loading, whilst the cumulative concepts produce more rational indication of the level of damage in case of earthquake excitations. Ideally, a DI should vary within a scale of 0 to 1 with 0 representing the state of elastic response, and 1 referring to the state of total collapse. Some of the available DIs do not satisfy these criteria. A new DI based on energy is proposed herein and its performances, both for static and for cyclic loadings, are compared with those obtained using the most widely accepted DI in literature. The proposed DI demonstrates a rational way to predict the extent of damage for a number of case studies. More research is encouraged to address some identified issues.
Keyword Cyclic loading
Damage analysis
Damage index
Earthquake
Hysteretic energy
Reinforced concrete
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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Created: Tue, 29 Jul 2014, 11:56:13 EST by System User on behalf of School of Civil Engineering