A Refined Analysis Method for Load Rating a Spandrel Arch Bridge

摘要

For bridges with complex geometry that do not fall in the AASHTO criteria for live load distribution factor calculations, traditional analysis tools cannot be used to directly rate the structure. Load rating of complex bridges often requires investigations through 3D refined analysis or load testing. This paper will present a tested and applied methodology to accurately define load rating of an open spandrel arch bridge with three continuous units as well as a discussion about associated challenges with load rating, recommendations and comparisons between 2D and 3D models will be discussed.