Comparative Analysis of Structural Behavior of a Four-Span Parker Truss Bridge Subjected to Horizontal Loading

This study presents a comparative numerical analysis of a four-span Parker steel truss bridge under horizontal loading conditions. While Parker trusses are traditionally optimized for vertical gravity loads through their variable-depth geometry, their response to lateral forces—such as wind or seismic actions—is critical for ensuring overall structural stability. Using a finite element model developed in Abaqus, this research evaluates the lateral displacement and von Mises stress distribution induced by a concentrated horizontal force of ۲۰۰ kN. The analysis investigates the load-transfer mechanism and the structural vulnerability of the Parker configuration when subjected to lateral demands. The findings demonstrate that the variable-depth design, while highly efficient for vertical loads, exhibits specific behavioral patterns under horizontal excitation, providing essential insights into the lateral robustness of Parker truss systems. This study contributes to a deeper understanding of the structural performance of variable-depth bridges under diverse environmental loading scenarios.

کلیدواژه ها:

Parker steel truss bridge ، load-carrying capacity ، structural behavior