Power flow and structural intensity analyses of cracked orthotropic steel bridge decks

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-05 DOI:10.1016/j.tws.2025.113161

Xun Zhang , Xing Wan , Hao Li , Derui Kong , Cong Li , Jinyi Zhao

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引用次数: 0

Abstract

Identifying fatigue-induced structural damage and implementing effective maintenance measures can reduce damage accumulation in Orthotropic steel decks (OSDs). This study proposes a new method for fatigue damage identification in OSDs, examining power flow. An OSD's structural intensity (SI) is calculated and visualized using the finite element method and self-developed code. The effects of excitation frequency on the transmission of structural vibration power flow are analyzed. The effects of crack type, location, and length on the transmission path and distribution of structural vibration power flow are investigated. The findings demonstrated that the SI index is sensitive to minor structural damage, which is feasible for identifying fatigue damage in OSDs. The excitation frequency significantly influences the transmission path and structural vibration power flow distribution. When damage occurs, the SI of elements on the left and right sides of the crack diverges, increasing the SI at both ends. The proximity of the damage to the excitation source and the crack length contribute to the ease of damage identification. This method can be utilized in practical engineering applications to accurately locate the crack and determine its length.

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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.