Monitoring the flexural performance of GFRP repaired corroded reinforced concrete beams using passive acoustic emission technique

Abstract

The focus of the research is to evaluate the flexural behavior and performance of glass fiber reinforced polymer (GFRP) repaired reinforced concrete (RC) beams corroded to different levels using acoustic emission (AE) techniques. A significant improvement in the flexural characteristics of the GFRP repaired corroded beams is observed with a change in failure mode from brittle to ductile. The benefits of GFRP repair in corroded RC beams are further clearly demonstrated by AE monitoring parameters of cumulative AE hits and their amplitudes. A significant improvement in the number of AE hits and the reappearance of AE cracking phases after repair of corroded beams indicate the efficiency of AE technique to monitor repaired structures also. A pictorial representation of the development of microcracks beneath the surface of concrete and GFRP to the formation of macrocracks is well demonstrated in an AE event plot. The assessment of local damage in RC beams using AE techniques subjected to simultaneous loading and corrosion and their further repair would facilitate in‐situ nondestructive evaluation of actual RC structures in future for detecting damage beneath the surface even after FRP repair.

Mathematical statistics algorithm in the bending performance test of corroded reinforced concrete beams under fatigue load

“…After the steel is corroded, the cross-section will be rusted, which will cause stress concentration in the weakest cross-section when the steel is stretched [5]. Scholars have established the relationship between the nominal yield augmentation f vyv of the corroded counterbearing and the rust loss rate η sv of the counterbearing section as [6]:…”

New Anchorage Technique for GFRP Flexural Strengthening of Concrete Beams Using Bolts-End Anchoring System

“…It is successfully demonstrated that combined AE and DIC monitoring enhance non-destructive monitoring skills in RC structures and effectively depict their cracking behavior. Garhwal et al (2021) investigated the flexural behavior of glass fiber reinforced polymer (GFRP) repaired reinforced beams. A novel methodology has been developed for assessing the performance of these beams using AE techniques.…”

Experimental investigation of GFRP‐reinforced concrete columns made with waste aggregates under concentric and eccentric loads

“…GFRP‐reinforced RC columns have been given special attention among structural members as one of the main elements of concrete structures 1–4 . Many studies have been done to demonstrate the effect of using GFRP compared with steel on the axial behavior of RC columns 5–11 . De Luca and Nanni 12 presented a comprehensive overview of the behavior of concrete reinforced by GFRP bars.…”

“…[1][2][3][4] Many studies have been done to demonstrate the effect of using GFRP compared with steel on the axial behavior of RC columns. [5][6][7][8][9][10][11] De Luca and Nanni 12 presented a comprehensive overview of the behavior of concrete reinforced by GFRP bars. A discussion of design approaches for RC structures with internal GFRP bars follows the introduction of the mechanical and durability properties of both concrete and GFRP bars.…”