Novel Composites Jacket for Repair of Concrete Columns

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Title: Novel Composites Jacket for Repair of Concrete Columns

Author(s): Allan C. Manalo, Ali Abdulkareem Mohammed, and Ginghis Maranan

Publication: Special Publication

Volume: 327

Issue:

Appears on pages(s): 3.1-3.12

Keywords: composite jacket, joint, repair system, concrete structures, pile rehabilitation, FE simulation

Date: 11/1/2018

Abstract:
This paper presents the development of a new type of fiber reinforced polymer (FRP) composites jacket and the evaluation to demonstrate the application of this pre-fabricated composite repair system for rehabilitation of deteriorating concrete columns. The novelty of this fiber composite strengthening system is that it is quick and safe to install due to the easy-fit and self-locking mechanical joint. An intensive characterisation of the mechanical properties of the composite resin for the interlocking teeth and locking key of the jacket was conducted. Similarly, finite element (FE) simulation on the behaviour of the FRP jacket subjected to internal pressure was performed and verified through full-scale experimental testing. Finally, the behaviour of concrete columns with simulated steel corrosion defect and repaired with a composite jacket was investigated. The results showed that the provision of FRP jacket restored the axial capacity of concrete columns with 25% and 50% corrosion damage up to 99% and 95%, respectively.