(049)Numerical Investigations of Vib ration- Based D amage D etection in a S teel Truss Bridge

摘要

Monitoring bridgeso modal parameters changes can provide better insight into identification and even localization of damage. This paper attempts to relate the modal parameters change and stress redistribution due to artificial damage simulated on a numerical model of a real steel truss bridge. Using white noise excitation, dynamically simulated vibration data of the model is used to obtain dominant modes utilizing two system identification techniques. Damage location has a unique influence on stress redistribution that causes certain mode shape distortion and frequency change.