Nondestructive Inspection Techniques for Fiber-Reinforced Polymer Bridges

This report reviews quality assessment (QA) and quality control (QC) methods used during fabrication of fiber-reinforced bridge structures. In addition, potential candidates of nondestructive inspection (NDI) techniques that enable structural life-cycle performance monitoring are evaluated. The report establishes recommendations for QC/QA practices for FRP-based civil structures. Various bridge types and their substructures are introduced and critical defects are identified with respect to the type of structures and material used. Current and emerging technologies and their potential benefits and limitations are discussed. QA/QC and the various NDI techniques ensure that the product meets quality standards during construction and/or fabrication stages. The research will lead to a better understanding of FRP structures and thus to more composite candidates in the DelDOT system.