Structural Identification from Operational Modal Analysis: The Case of Steel Structures

In the case of old existing structures where cultural value is very high, structural health analyses and investigations would be better performed without damages or service interruptions. Thus, modal analysis aimed at identifying eigenfrequencies eigenmodes represents a effective strategy to identify characteristics. this paper, an innovative parameters exploiting information obtained from operational proposed. The importance modeling in problem formulation highlighted. simply supported beam, it was possible assess beam steel elastic modulus, while cantilever some constraint characteristics have been evaluated as well. frame case, focus on conditions structure determining flexural stiffness springs representing column base constraints. method performances are promising for applications larger such bridges buildings.