Shear and flexural strength prediction of corroded R.C. beams. (15th September 2017)

• Record Type: Journal Article
• Authors: Campione, G.; Cannella, F.; Cavaleri, L.
• Is Part Of: Construction & building materials. Volume 149(2017)
• Page Start: 395
• Page End: 405
• Publication Date: 2017-09-15
• Subjects: Shear-moment interaction -- Corrosion -- Bond -- Pitting -- Flexural response; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.05.125
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Experimental versus analytical prediction of effects of general and pitting corrosion on steel bars. Experimental versus analytical prediction of effects of general and pitting corrosion on R.C. cross-section if flexure. Experimental versus analytical prediction of effects of general and pitting corrosion on R.C. beams in shear. Case of study for strength and ductility degradation in flexure and shear of R.C. beams under natural corrosion scenarios. Abstract: The purpose of the work was the study of the structural safety of R.C. beams subjected to corrosion processes though the derivation of moment-curvature diagrams and moment-to-shear interaction diagrams. Normal-strength reinforced concrete beams with longitudinal bars in the presence of transverse stirrups and subjected to corrosion processed are considered. Experimental results available in the literature related to corrosion processes, for steel bars, crack openings and bond degradation due to rust formation are reviewed. Then analytical laws relating to crack opening, bond degradation with attack penetration depth, through a rearranged form of Faraday's law, are presented. An analytical model for cross-section analysis and shear strength prediction including the main effect due to rust formation is developed and verified against experimental data. Finally, a case study is added giving moment-curvature diagrams and moment-to-shear interaction diagrams to show the effects of different scenarios of natural corrosion increasing with time on beam elements.