A Method for Identification of Short Hanger Tension Considering Damper

The hanger is a critical part of arch bridges which decides the security of the bridge. The tension of hanger is the major parameter to evaluate the structural behavior during the health monitoring. Besides, the damper which used for reducing the vibration significantly affects the tension of hanger. The flexural rigidity and damping stiffness should be considered in order to get accurate tension. The four unknown parameters are calculated by utilizing the additional mass method. The Genetic Algorithm is applied to solve the difficult inverse calculation of multi-parameters. It is proved that the additional mass method is feasible to identify the hanger tension accurately through the numerical simulation.