Improved Infrastructure Assessment Through the Integration of Nondestructive Evaluation and Structural Health Monitoring Paradigms

Résumé du livre

This report provides recommendations for integrating both nondestructive evaluation (NDE) data and field data from structural health monitoring (SHM) to obtain load ratings that reliably represent a bridge's load-carrying performance. Modern NDE techniques, which provide accurate location and characterization of deteriorations, enable more reliable estimates of capacity. The existing LRFD Bridge Design Specifications provide detailed equations for determining the capacity of a given bridge member (AASHTO 2017). The dimensions or material properties used in these equations should be revised based on NDE results. Several common deterioration types are shown through analytical studies to have minor effects on the capacity of composite girder sections. Demand estimates require structural analysis to translate globally applied loads to their corresponding member actions or force effects. The effects of local deterioration and defects on member demands were investigated through finite-element (FE) simulation and were shown to have negligible effect (