Citation

Yang K, Ding Y, Zhao H, Geng F, Sun Z. Balt. J. Road Bridge Eng. 2022; 17(2): 47-74.

Copyright

(Copyright © 2022, Vilnius Gediminas Technical University, Publisher Technika)

DOI

10.7250/bjrbe.2022-17.560

PMID

unavailable

Abstract

The bridge influence line (IL) reflects the response of a certain section due to varying load positions. As a result, IL has a wide application prospect in damage identification and condition assessment. Up to date, studies regarding IL have been focused on the structure condition evaluation. A feasible and practical method for damage identification is still not yet available. The present paper proposes a comprehensive damage identification methodology based on IL under a moving vehicle is composed of data pre-processing, IL extraction, and damage detection. Firstly, a thorough review of existing IL identification methods based on signal processing is provided. Then three quasi-static IL identification methods based on measured data are discussed. Consequently, the study proposes a two-stage damage identification approach for simply supported bridges with equal span length. Also, the effectiveness of this approach is verified through field tests on a real girder bridge. At last, conclusions are drawn, and potential issues for the application of the proposed method in practice are discussed.

Language: en

Keywords

damage identification; deflection; dynamic displacement IL; equal-span bridges; influence line; vehicle loads