Abstract
This paper presents a verification of a state-of-the-art joint input-state estimation algorithm using data obtained from in situ experiments on a footbridge. A dynamic model of the footbridge is based on
a detailed finite element model that is calibrated using a set of experimental modal characteristics. The joint input-state estimation algorithm is used for the identification of two impact, harmonic, and swept sine forces applied to the bridge deck. In addition to these forces, unknown stochastic forces, such as wind loads, are acting on the structure. These forces, as well as measurement errors, give rise to uncertainty in the estimated forces and system states. Quantification of the uncertainty requires determination of the power spectral density of the unknown stochastic excitation, which is identified from the structural response under ambient loading. The verification involves comparing the estimated forces with the actual, measured forces. Although a good overall agreement is obtained between the estimated and measured forces, modeling errors prohibit a proper distinction between multiple forces applied to the structure for the case of harmonic and swept sine excitation.
a detailed finite element model that is calibrated using a set of experimental modal characteristics. The joint input-state estimation algorithm is used for the identification of two impact, harmonic, and swept sine forces applied to the bridge deck. In addition to these forces, unknown stochastic forces, such as wind loads, are acting on the structure. These forces, as well as measurement errors, give rise to uncertainty in the estimated forces and system states. Quantification of the uncertainty requires determination of the power spectral density of the unknown stochastic excitation, which is identified from the structural response under ambient loading. The verification involves comparing the estimated forces with the actual, measured forces. Although a good overall agreement is obtained between the estimated and measured forces, modeling errors prohibit a proper distinction between multiple forces applied to the structure for the case of harmonic and swept sine excitation.
| Original language | English |
|---|---|
| Title of host publication | Life-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure |
| Subtitle of host publication | Proceedings of the 5th International Symposium on Life-Cycle Engineering, Delft, Netherlands |
| Editors | Jaap Bakker, Dan M. Frangopol, Klaas van Breugel |
| Publisher | Taylor & Francis |
| Pages | 339-346 |
| Number of pages | 8 |
| ISBN (Electronic) | 978-1-4987-7701-8 |
| ISBN (Print) | 978-1-138-02847-0 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | 5th International Symposium on Life-Cycle Engineering: Life-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure - Delft, Netherlands Duration: 16 Oct 2016 → 20 Oct 2016 Conference number: 5 http://www.ialcce2016.org/ |
Publication series
| Name | Life-Cycle of Civil Engineering Systems |
|---|---|
| Publisher | CRC Press |
Conference
| Conference | 5th International Symposium on Life-Cycle Engineering |
|---|---|
| Abbreviated title | IALCCE 2016 |
| Country/Territory | Netherlands |
| City | Delft |
| Period | 16/10/16 → 20/10/16 |
| Internet address |