A Review on Optimization of Rectangular Box Bridge Structures under IRC Loading

Abstract

Rectangular box bridge structures are widely used in highway and railway transportation systems due to their high structural efficiency, durability, aesthetic appearance, and ability to accommodate heavy traffic loads. With the increasing demand for economical and sustainable infrastructure, optimization of rectangular box bridges has become an important area of research in structural engineering. This review paper presents a comprehensive study on the optimization techniques adopted for rectangular box bridge structures designed under Indian Roads Congress (IRC) loading conditions. The paper discusses various analytical and numerical approaches used for optimizing bridge parameters such as span-to-depth ratio, slab thickness, wall thickness, reinforcement detailing, and material consumption. Different optimization methods including finite element analysis, cost optimization, sensitivity analysis, and parametric studies carried out using software such as STAAD.Pro, MIDAS Civil, ANSYS, and SAP2000 are reviewed. The influence of IRC loading standards, including IRC Class A and IRC 70R loading, on the structural behavior and economy of box bridges is also examined. The review highlights the effects of bending moment, shear force, torsion, deflection, and soil-structure interaction on optimized design. From the collected literature, it is observed that optimized rectangular box bridge structures provide considerable savings in construction cost, reduction in material usage, improved load carrying capacity, and enhanced structural performance. The study concludes that the application of advanced optimization techniques along with IRC guidelines can lead to safer, durable, and economical bridge structures suitable for modern transportation networks.