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Earthquakes and Structures
  Volume 20, Number 2, February 2021 , pages 215-224
DOI: https://doi.org/10.12989/eas.2020.20.2.215
 


Seismic performance of low-rise reinforced concrete moment frames under carbonation corrosion
Hossein Vaezi, Amir Karimi, Mohsenali Shayanfar and Amir Safiey

 
Abstract
    The carbon dioxide present in the atmosphere is one of the main reasons for the corrosion of bridges, buildings, tunnels, and other reinforced concrete (RC) structures in most industrialized countries. With the growing use of fossil fuels in the world since the Industrial Revolution, the amount of carbon dioxide in urban and industrial areas of the world has grown significantly, which increases the chance of corrosion caused by carbonation. The process of corrosion leads to a change in mechanical properties of rebars and concrete, and consequently, detrimentally impacting load-bearing capacity and seismic behavior of RC structures. Neglecting this phenomenon can trigger misleading results in the form of underestimating the seismic performance metrics. Therefore, studying the carbonation corrosion influence on the seismic behavior of RC structures in urban and industrial areas is of great significance. In this study, a 2D modern RC moment frame is developed to study and assess the effect of carbonation corrosion, in 5-year intervals, for a 50 years lifetime under two different environmental conditions. This is achieved using the nonlinear static and incremental dynamic analysis (IDA) to evaluate the reinforcement corrosion effects. The reduction in the seismic capacity and performance of the reinforced concrete frame, as well as the collapse probability over the lifetime for different corrosion scenarios, is examined through the capacity curves obtained from nonlinear static analysis and the fragility curves obtained from IDA.
 
Key Words
    corrosion effects; carbonation corrosion; nonlinear static analysis; incremental dynamic analysis (IDA)
 
Address
Hossein Vaezi:The Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology,P.O. Box: 16765-163; Narmak, Tehran, Iran
Amir Karimi:Rehabilitation and Retrofitting Research Centre, Iran University of Science and Technology, Tehran, Iran

Mohsenali Shayanfar:The Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology,P.O. Box: 16765-163; Narmak, Tehran, Iran

Amir Safiey:Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, CO, U.S.A.
 

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