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Estimation of Corrosion-Free Reinforcement as Replacement to Steel Rebars for Concrete Walls

Estimation of Corrosion-Free Reinforcement as Replacement to Steel Rebars for Concrete Walls Reinforced concrete (RC) walls are commonly used in various structures to resist lateral forces. In the current paper, hybrid usage of stainless steel (SS) and glass fiber-reinforced polymer (GFRP) as an alternative of steel rebars, which is susceptible to corrosion, is proposed to improve durability of RC walls. Due to the high cost of SS compared to GFRP, SS rebars are utilized as concentrated reinforcement (RFT) in plastic hinge regions while GFRP rebars are used elsewhere. This combination has the advantage of providing adequate ductility and strength needed to resist both gravity and lateral forces effectively. A comprehensive parametric study is conducted on a large number of RC walls with different dimensions and RFT ratios under various axial compressive loads. Pushover analysis is utilized to analyze the RC walls using a robust finite element software. The results of the parametric study are utilized to develop a set of design equations that can be used to estimate amount of SS-GFRP RFT as a replacement to steel rebars. The obtained corrosion-resistant walls have stiffness, lateral strength, and ductility equivalent to the steel-reinforced walls. The developed equations are examined by investigating the response of a case study RC building under seismic loading. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of The Institution of Engineers (India):Series A Springer Journals

Estimation of Corrosion-Free Reinforcement as Replacement to Steel Rebars for Concrete Walls

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References (35)

Publisher
Springer Journals
Copyright
Copyright © The Institution of Engineers (India) 2022
ISSN
2250-2149
eISSN
2250-2157
DOI
10.1007/s40030-022-00663-z
Publisher site
See Article on Publisher Site

Abstract

Reinforced concrete (RC) walls are commonly used in various structures to resist lateral forces. In the current paper, hybrid usage of stainless steel (SS) and glass fiber-reinforced polymer (GFRP) as an alternative of steel rebars, which is susceptible to corrosion, is proposed to improve durability of RC walls. Due to the high cost of SS compared to GFRP, SS rebars are utilized as concentrated reinforcement (RFT) in plastic hinge regions while GFRP rebars are used elsewhere. This combination has the advantage of providing adequate ductility and strength needed to resist both gravity and lateral forces effectively. A comprehensive parametric study is conducted on a large number of RC walls with different dimensions and RFT ratios under various axial compressive loads. Pushover analysis is utilized to analyze the RC walls using a robust finite element software. The results of the parametric study are utilized to develop a set of design equations that can be used to estimate amount of SS-GFRP RFT as a replacement to steel rebars. The obtained corrosion-resistant walls have stiffness, lateral strength, and ductility equivalent to the steel-reinforced walls. The developed equations are examined by investigating the response of a case study RC building under seismic loading.

Journal

Journal of The Institution of Engineers (India):Series A – Springer Journals

Published: Dec 1, 2022

Keywords: Corrosion; Ductility; Hybrid; Pushover

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