A Novel and Effective Anchorage System for Enhancing the Flexural Capacity of RC Beams Strengthened with FRCM Composites

Abstract

Previous experimental studies revealed that anchorage systems were able to increase the efficiency of fiber reinforced polymers (FRP) in terms of the flexure or shear enhancements and ductility performance of the structural members. This study was conducted to investigate the suitability and effectiveness of two anchorage systems for enhancing the bond performance of fiber reinforced cementitious matrix composite (FRCM), a more recent strengthening technique using a cementitious-based binding system. In the interest of improving its flexural performance, two anchorage systems were examined here: a glass spike anchor and a novel U-wrapped anchor. The novel U-wrapped anchor is a PBO strip where its’ ends had only the fabrics in the longitudinal direction that gathered and anchored into the concrete using epoxy adhesive agent. The idea behind anchoring the ends of the U-wrapped PBO strip into RC beams was to rely on the high tensile strength of the PBO strip to control the premature debonding of the FRCM composite. Real-scale simply supported RC beams were examined under the effect of strengthening with different reinforcement ratios and with and without anchorage systems engagement. Test results revealed the contribution of anchorage systems in preventing or delaying the FRCM debonding failure mechanism and enhancing the flexural performance of strengthened beams.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

The work was supported by the ReCAST Tier 1 University Transportation Center at Missouri S&T, Rolla, Missouri, USA (Grant: DTRT13-G-UTC45).

Keywords and Phrases

Anchorage; Flexural behavior; FRCM strengthening; Glass spike; U-wrapped PBO anchorage

International Standard Serial Number (ISSN)

0263-8223; 1879-1085

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Elsevier, All rights reserved.

Publication Date

01 Feb 2019

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