Corrosion-Fatigue Life Prediction Modeling for RC Structures under Coupled Carbonation and Repeated Loading

Chenxing Cui, Li Song, Jinliang Liu and Zhiwu Yu
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Chenxing Cui: School of Civil Engineering, Central South University, Changsha 410075, China
Li Song: School of Civil Engineering, Central South University, Changsha 410075, China
Jinliang Liu: School of Civil Engineering, Central South University, Changsha 410075, China
Zhiwu Yu: School of Civil Engineering, Central South University, Changsha 410075, China

Mathematics, 2021, vol. 9, issue 24, 1-18

Abstract: The coupled action of concrete carbonation and repeated loading strongly influences the safety of reinforced concrete (RC) structures and substantially reduces service life. A novel corrosion-fatigue life prediction model for RC structures under coupled carbonation and repeated loading was developed. The effect of fatigue damage on concrete carbonation and carbonation-induced corrosion rate was considered, and the acceleration of fatigue damage accumulation due to reinforcement corrosion was considered in this approach. The proposed corrosion-fatigue life prediction model was illustrated by a 6 m-span RC slab in a simply supported slab bridge for the highway, and the effects of traffic frequency, overloading, carbonation environment grade, and environmental temperature and relative humidity on corrosion-fatigue life were discussed. The results indicate that the proposed model can predict the corrosion-fatigue life of RC structures simply and conveniently. Traffic frequency, overloading, carbonation environment grade, and environmental temperature and relative humidity can decrease the corrosion-fatigue life of the RC slab by up to 66.86%, 58.90%, 77.45%, and 44.95%, respectively. The research is expected to provide a framework for the corrosion-fatigue life prediction of RC structures under coupled carbonation and repeated loading.

Keywords: reinforced concrete structures; corrosion-fatigue life; coupled action; fatigue damage; carbonation-induced corrosion; simply supported slab bridge (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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