Seismic resistance prediction of corroded S400 (BSt420) reinforcing bars. Issue 1 (5th February 2018)

• Record Type: Journal Article
• Authors: Apostolopoulos, Charis; Konstantopoulos, George; Koulouris, Konstantinos
• Is Part Of: International journal of structural integrity. Volume 9:Issue 1(2018)
• Page Start: 119
• Page End: 138
• Publication Date: 2018-02-05
• Subjects: Buckling -- Corrosion damage -- Hysteresis loops -- Low cycle fatigue -- S400 (BSt420) reinforcing steel -- Stress-strain predictive model; Structural engineering -- Research -- Periodicals; 620.11205
• DOI: 10.1108/IJSI-02-2017-0008
• Languages: English
• ISSNs: 1757-9864

Abstract

Abstract : Purpose: Structures in seismic areas, during their service lifetime, are subjected to numerous seismic loads that certainly affect their structural integrity. The degradation of these structures, to a great extent, depends on the scale of seismic events, the steel mechanical performance on reversal loads and its resistance to corrosion phenomena. The paper aims to discuss these issues. Design/methodology/approach: Based on the experimental results of seismic steel behavior S400 (BSt III), which was widely used in the past years, a prediction study of seismic steel behavior was conducted in the current study. This prediction on behavior of both reference and corroded steel was succeeded through a simulation of experimental low cycle fatigue conditions (LCF – strain controlled). Findings: At the same time, the present study analyses fatigue factors (ef, a, f SR, ed, ep, R, b) that define their inelastic relation between tension – strain and a prediction model on behavior of both reference and corroded steel rebar, in seismic loads conditions (LCF), is proposed. Originality/value: Moreover, this study dealt with the synergy of corrosion factor and the existence of superficial ribs (ribbed and smoothed) in seismic behavior of steel bar S400 (BSt420). The S-N curves that are exported can be resulted in a first attempt of prediction of anti-seismic behavior on reinforced concrete structures with this the same steel class.