A New Optimal Sensor Location Method for Double-curvature Arch Dams: A Comparison with the Modal Assurance Criterion (MAC)

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Periodica Polytechnica-Civil Engineering Pub Date : 2023-11-06 DOI:10.3311/ppci.22031

Amir Meysam Giahi, Jafar Asgari Marnani, Mohammad Sadegh Rohanimanesh, Hassan Ahmadi

引用次数: 0

Abstract

Determining the optimal location of sensors in order to identify modal parameters in large structures such as dams is one of the most important and widely used topics in damage detection and health monitoring of structures. In this research, the modal parameters including the natural frequency and mode shape of two arched concrete dams have been calculated using the finite element method for healthy and damaged dams. The reduction of the elastic modulus of concrete in different parts and percentages has been used as the degree of damage. Then, using the modal confidence criterion (MAC) method, the optimal location of the sensors is determined, then the results of this method are compared with the new method. The results show that in both dams, the new method matches the MAC method with 90% accuracy. This new method is a fast and suitable measure to determine the optimal location of sensors in arched concrete dams.

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一种新的双曲率拱坝传感器最优定位方法&与模态保证准则的比较

确定传感器的最优位置以识别大型结构(如大坝)的模态参数是结构损伤检测和健康监测中最重要和广泛应用的课题之一。本文采用有限元法计算了两座健康和受损拱坝的模态参数，包括固有频率和模态振型。以混凝土弹性模量在不同部位和百分比的降低量作为损伤程度。然后，利用模态置信准则(MAC)方法确定传感器的最优位置，并将该方法的结果与新方法进行比较。结果表明，在两个大坝中，新方法与MAC方法的匹配精度达到90%。该方法是确定混凝土拱坝中传感器最优位置的一种快速、合适的方法。

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

Periodica Polytechnica-Civil Engineering 工程技术-工程：土木

CiteScore

3.40

自引率

16.70%

发文量

审稿时长

12 months

期刊介绍： Periodica Polytechnica Civil Engineering is a peer reviewed scientific journal published by the Faculty of Civil Engineering of the Budapest University of Technology and Economics. It was founded in 1957. Publication frequency: quarterly. Periodica Polytechnica Civil Engineering publishes both research and application oriented papers, in the area of civil engineering. The main scope of the journal is to publish original research articles in the wide field of civil engineering, including geodesy and surveying, construction materials and engineering geology, photogrammetry and geoinformatics, geotechnics, structural engineering, architectural engineering, structural mechanics, highway and railway engineering, hydraulic and water resources engineering, sanitary and environmental engineering, engineering optimisation and history of civil engineering. The journal is abstracted by several international databases, see the main page.