United States Department of Transportation
i
Infrastructure Inspection During and After Unexpected Events – Phase II
-
2020-01-01
[PDF-6.11 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final Report September 2018 – December 2019
-
Corporate Publisher:
-
Abstract:This report presents the development of a finite element (FE) model updating scheme of a highway bridge. In this process, the FE model, based on the original drawing of the bridge, generates a numerical data set that is used to build regression surfaces between the models’ parameters and the model’s response represented by the natural frequencies and the local transmissibility. Measurements are then conducted on the physical model of the bridge at crucial nonstationary nodes on the superstructure, and the corresponding natural frequencies and local transmissibility are determined from the power spectral density (PSD) and the PSD ratios of the responses, respectively. Both transient as well as stationary excitation methods were exploited to extract system modal properties. An iterative process is then applied to identify the unknown parameters of the physical model by matching the experimental responses with the available parameters in the numerical data set. The proposed method was tested on a highway-bridge model with elastic foundations and showed very promising results.
The dataset can be accessed via this link: https://doi.org/10.13014/K2VX0DRZ
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
