A novel method for identification of damage location in frame structures using a modal parameters-based indicator

Archives of civil engineering

article

Mina Roodgar Nashta¹  Reza Taghipour¹  Mohsen Bozorgnasab¹  Hessam Mirgolbabaei² 

[1] Department of Civil Engineering, University of Mazandaran;Department of Mechanical and Industrial Engineering, University of Minnesota

关键词: damage detection;    frame;    modal parameters;    mechanical failure;    finite element model;   

DOI  :  10.24425/ace.2022.141907

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

Diverse strategies for identifying and finding the damages in structures have been continuously engaging to originators within the field. Due to the direct connection between the firmness, characteristic frequency, and mode shapes within the structure, the modular parameters may well be utilized for recognizing and finding the damages in structures. In current consider, a modern damage marker named Damage Localization Index (DLI) is applied, utilizing the mode shapes and their derivative. A finite element model of a frame with twenty and thirty components has been utilized, separately. The numerical model is confirmed based on experimental information. The indicator has been explored for the damaged components of a frame with one bay. The results have been compared with those of the well-known index CDF. To demonstrate the capability and exactness of the proposed method, the damages with low seriousness at different areas of the structures are explored. The results are investigated in noisy condition, considering 3% and 5% noise on modal data. The outcomes show the high level of accuracy of the proposed method for identifying the location of the damaged elements in frames.

【 授权许可】

Unknown