Structural Response of a Three-Span Concrete Bridge with a ۵۰-cm Deck Slab under Combined Vertical Loading: A Case Study

This study presents a comprehensive behavioral assessment of a three-span continuous reinforced concrete bridge, focusing on the structural response of a ۵۰-cm thick deck slab subjected to combined vertical loadings. While multi-span continuous bridge systems are recognized for their structural efficiency, the interaction between increased deck stiffness and the simultaneous application of diverse loading patterns is critical for performance optimization. Utilizing finite element analysis (FEA) via Abaqus, this research models a ۲۴-meter continuous system to evaluate complex stress distribution patterns and vertical displacement fields under combined service conditions. The results demonstrate that the enhanced thickness of the deck slab provides superior rigidity, effectively mitigating stress concentrations and maintaining structural integrity across the continuous spans. The study confirms that the integration of a ۵۰-cm deck slab significantly improves load redistribution toward intermediate supports, ensuring high levels of serviceability even under demanding load combinations. These findings provide valuable insights into the design and assessment of reinforced concrete bridges, validating that geometric optimization is a robust strategy for managing complex forces and enhancing the overall performance of multi-span bridge systems.

کلیدواژه ها:

two-span bridge ، concrete bridge ، deck continuity ، finite element analysis