Behavior of Tied-Arch Bridge Under Cable Loss Scenarios Using Nonlinear Finite Element Method

Abstract

A tied-arch bridge, currently in service for over 30 years, has exhibited various signs of structural deterioration. Notably, damage has been observed in several hangers of the arch system. This study aims to analyze and evaluate the structural behavior of the bridge under different cable loss scenarios using the Nonlinear Finite Element Method (NLFEM). The investigation focuses on load transfer mechanisms, deformation behavior, and failure mechanisms of the bridge. GiD Simulation and ATENA Science were employed to perform structural modeling and analysis. Several scenarios were considered, including single cable failure and progressive cable loss. The analysis results indicate that certain cables are critical to the structural stability, and their failure may trigger a failure mechanism that could lead to collapse. The insights gained from this study can be applied to structural strengthening strategies and rehabilitation planning to enhance the safety and stability of the bridge