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Title:

Condition Assessment of Fiber Reinforced Polymer Strengthening of Concrete Bridge Components

Accession Number:

01592834

Record Type:

Component

Abstract:

Fiber Reinforced Polymer (FRP) strengthening of deteriorated, damaged or structurally unsafe concrete bridge components is an increasingly popular technique. The method is economic, durable, convenient and labor friendly, being employed now by many highway agencies. The long-term in-situ performance of the FRP-epoxy-concrete interface bonding is a primary concern, due to the potential for age related environmental degradation, and also any possible lack of quality control during the FRP installation. In this study, the carbon FRP (CFRP) wrapping on eight selected concrete bridges in the Dallas-Fort Worth metroplex area was evaluated for current on-site current condition. In addition to visual inspection, FRP pull-off testing specified by the ASTM was performed on site on selected retrofitted columns and girders in the target bridges to assess the current condition of the interface FRP bonding. A majority of the test FRP pull-off samples failed in the concrete substrate (the preferred ASTM mode of failure indicating strong bond presence). However, the test data on failure modes and pull-off strengths was scattered, possibly due to environmental degradation or a lack of proper quality control during the initial CFRP application. The age of each bridge did not correlate well with the percentage of samples failing in the ASTM preferred mode, indicating that environmental degradation could be eliminated as a possible factor. Good record keeping at the initial FRP installation, proper quality control at that initial installation and proper pull-off test procedure are essential in ensuring good performance of the FRP strengthening and efficient in-situ performance testing.

Supplemental Notes:

This paper was sponsored by TRB committee AFF80 Standing Committee on Structural Fiber Reinforced Polymers.

Monograph Accession #:

01584066

Report/Paper Numbers:

16-4103

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Pallempati, Hemachand
Beneberu, Eyosias
Yazdani, Nur
Patel, Sunil

Pagination:

16p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Maps; Photos; References; Tables

Subject Areas:

Bridges and other structures; Highways; Maintenance and Preservation; Materials

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-4103

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 5:48PM