Assessment of reinforced concrete slab bridges through in-situ load testing

Abstract

This thesis presents a methodology for assessing reinforced concrete slab bridges through a series of in-situ load tests, developed from a series of case studies and code requirements. A full-scale load testing program was conducted on a reinforced concrete slab bridge using three approaches: static vehicle loading, operational modal analysis using ambient vibrations, and a static load bag. Following the load tests, load ratings were calculated using the Canadian Highway Bridge Design Code (CSA S6:19) and AASHTO's Manual for Bridge Evaluation methodologies for load rating by load testing. Additionally, a series of calibrated linear finite element models were developed for each load test configuration completed and further used to generate supplementary load rating results. The findings demonstrate the effectiveness of combining empirical testing with analytical modeling to enhance the accuracy and reliability of bridge assessments. This methodology contributes to improved decision-making for maintenance, rehabilitation, and continued service of existing slab bridge structures.