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Identification and updating for the three‐dimensional finite element model of a long span steel skybridge
10.1002/tal.504.abs
An identification and updating procedure for the three‐dimensional finite element (FE) model of a long span steel skybridge is presented in this paper. Located at an elevation of 90 m, the skybridge is one of the six skybridges of Hangzhou Citizen Center, which is a hexadic‐tower tall building. The modal data of the skybridge is first estimated using output only identification method, and sensitivity‐based updating method is then applied to update the three‐dimensional FE model based on the estimated modal data. For the modal data identification, a time domain least square method and a data smoothing method were applied for pre‐processing the recorded acceleration time histories. The averaged normalized power spectral density was then used in the peak‐picking method to identify the natural frequencies. The updating algorithm is composed of sensitivity analysis and Bayesian estimation, and the parameter perturbations are estimated using a constrained optimization method. It is found that far better matches can be reached between the updated and estimated dynamic characteristics by using the proposed identification and updating procedure. Copyright © 2009 John Wiley & Sons, Ltd.
Identification and updating for the three‐dimensional finite element model of a long span steel skybridge
10.1002/tal.504.abs
An identification and updating procedure for the three‐dimensional finite element (FE) model of a long span steel skybridge is presented in this paper. Located at an elevation of 90 m, the skybridge is one of the six skybridges of Hangzhou Citizen Center, which is a hexadic‐tower tall building. The modal data of the skybridge is first estimated using output only identification method, and sensitivity‐based updating method is then applied to update the three‐dimensional FE model based on the estimated modal data. For the modal data identification, a time domain least square method and a data smoothing method were applied for pre‐processing the recorded acceleration time histories. The averaged normalized power spectral density was then used in the peak‐picking method to identify the natural frequencies. The updating algorithm is composed of sensitivity analysis and Bayesian estimation, and the parameter perturbations are estimated using a constrained optimization method. It is found that far better matches can be reached between the updated and estimated dynamic characteristics by using the proposed identification and updating procedure. Copyright © 2009 John Wiley & Sons, Ltd.
Identification and updating for the three‐dimensional finite element model of a long span steel skybridge
Zhao, X. (Autor:in) / Sun, H. H. (Autor:in) / Zheng, Y. M. (Autor:in)
The Structural Design of Tall and Special Buildings ; 18 ; 625-646
01.10.2009
22 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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