Reference-free distributed monitoring of deflections in multi-span bridges

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2024-11-14 DOI:10.1016/j.engstruct.2024.119277

Dario Poloni , Maurizio Morgese , Chengwei Wang , Todd Taylor , Marco Giglio , Farhad Ansari , Claudio Sbarufatti

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引用次数: 0

Abstract

The research presented herein pertains to developing a reference-free technique for monitoring bridge deflections under operational conditions. The method is based on monitoring the distributed strains along the length of bridges and employing the Inverse Finite Element Method (iFEM) to compute the deflection for the entire length of bridges. Distributed sensing of strains was achieved by a Brillouin Optical Time Domain Analysis system (BOTDA). The dynamic strains were then used in the iFEM algorithm to calculate the deflections of the structure. This approach computes structural displacements by a variational principle with minimal computational cost. Because of its independence from loads and material properties, the proposed methodology monitors the dynamic deflections during bridge routine traffic operations, and it is potentially viable for real-time monitoring. The approach is validated through two comprehensive case studies, including a laboratory experiment and a field application on a multi-span concrete bridge.

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多跨桥梁挠度的无参照分布式监测

本文介绍的研究涉及开发一种无参照物技术，用于监测运营条件下的桥梁挠度。该方法基于监测桥梁沿长度方向的分布应变，并采用反有限元法 (iFEM) 计算桥梁全长的挠度。布里渊光学时域分析系统 (BOTDA) 实现了对应变的分布式传感。动态应变随后被用于 iFEM 算法，以计算结构的挠度。这种方法通过变分原理计算结构位移，计算成本最低。由于该方法不受荷载和材料特性的影响，因此可在桥梁日常交通运营期间监测动态挠度，并可用于实时监测。通过两项综合案例研究，包括实验室实验和多跨混凝土桥梁的现场应用，对该方法进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.