Scanning vertical and flexural-torsional frequencies of thin-walled girder bridges using a two-axle vehicle and a signal enhancement approach

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-02-27 DOI:10.1016/j.tws.2025.113116

Xueqi Li , Yong Cai , Xiaoyong Lv , Haijun Chen

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引用次数: 0

Abstract

In research on using vehicles to extract bridge frequencies, single degree-of-freedom vehicles and two-dimensional bridges cannot fully simulate vehicle-bridge interaction and bridge frequency extraction. Therefore, a method of using two-axle vehicles to extract the vertical and flexural-torsional frequencies of three-dimensional (3D) bridges is proposed. First, the feasibility of this method is theoretically verified by analytical methods. Subsequently, a signal enhancement approach, combining successive variational mode decomposition (SVMD) and a designed window function, is proposed. SVMD performs modal decomposition on vehicle signals, while the window function reduces noise in vehicle signals and enhances bridge signals, resulting in a low-noise spectrum. The investigations indicate that bridge frequencies extracted by the proposed method exhibit a relative error of <5 %, which meets engineering requirements. Moreover, the method is insensitive to vehicle parameters and is not limited by two-axle vehicle types. Notably, vertical acceleration spectra of two-axle vehicles, filtered using the signal enhancement approach, can resist the effect of road roughness noise on bridge frequency identification. This study further advances the vehicle scanning method and offers a practical approach to bridge health monitoring.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.