Determining the static stiffness of structures: a comparison of methods involving measurement of displacement and measurement of acceleration response
Material type:
TextOnline resources:
In:
Acoustics 2015 Hunter Valley 15-18 November 2015Abstract: Two different methods of estimating the static stiffness of structures are compared. In the first approach, the structure is loaded with a known quasi-static force and its displacement is measured. The second approach is based on impact tests with a rubber tipped hammer where the dynamic response of the structure is determined and the static stiffness is obtained by extrapolating the receptance spectrum towards zero Hertz. This paper compares the results of both methods from measurements taken on an existing bridge, and discusses the relationship between the measured static stiffness using the force-displacement method and the dynamic approach based on impact tests.
Two different methods of estimating the static stiffness of structures are compared. In the first approach, the structure is loaded with a known quasi-static force and its displacement is measured. The second approach is based on impact tests with a rubber tipped hammer where the dynamic response of the structure is determined and the static stiffness is obtained by extrapolating the receptance spectrum towards zero Hertz. This paper compares the results of both methods from measurements taken on an existing bridge, and discusses the relationship between the measured static stiffness using the force-displacement method and the dynamic approach based on impact tests.