Research on Bridge Damage Identification Method Based on Dynamic Characteristics

The identification of bridge structural damage can be divided into four processes: determining whether there is damage, determining the location of the damage, determining the degree of damage, and evaluating the load-bearing capacity of the bridge structure after the damage occurs. The dynamic response data takes modal parameters as characteristic parameters, and the modal parameters of the bridge structure are independent of external loads, reflecting the structural characteristics of the structure itself. This article introduces five methods for damage identification based on dynamic characteristics, analyzes the identification principles, characteristics, and applications of each method, and summarizes their application conditions.