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Abstract

To detect structural abnormalities timely and ensure the safe operation of bridges, this paper took the health monitoring system of Xinguang Bridge in Guangzhou as the engineering background, and conducted research on a comprehensive multi-indicator early warning system for large-span steel arch bridges. Meanwhile, it selected multiple warning indicators from the categories of environmental effects and structural responses, set early warning indicator thresholds based on the distribution pattern of measured data, and formulated scoring standards for early warning indicators to score each early warning indicator. The analytic hierarchy process (AHP) was employed to determine the weight of various early warning indicators, and calculate the comprehensive early warning scores for environmental effects and structural responses, thus obtaining the comprehensive early warning level for environmental effects and structural response. In addition, a comprehensive early warning matrix for the structure was constructed, and the comprehensive early warning level for the structure was determined, with the corresponding post-warning measures developed. The early warning system was utilized to conduct early warning and analysis on the state of Xinguang Bridge during a certain period. The results show that the bridge is in the level 2 early warning state, with generally sound conditions and normal operation of the structure. However, the monitoring frequency should be appropriately increased.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.019

First Page

120

Last Page

126

Submission Date

March 2025

Reference

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