A comprehensive review on modal parameter-based damage identification methods for beam- or plate-type structures is presented, and the damage identification algorithms in terms of signal processing are particularly emphasized. Based on the vibration features, the damage identification methods are classified into four major categories: natural frequency-based methods, mode shape-based meth...... hiện toàn bộ
Vibration based condition monitoring refers to the use of in situ non-destructive sensing and analysis of system characteristics –in the time, frequency or modal domains –for the purpose of detecting changes, which may indicate damage or degradation. In the field of civil engineering, monitoring systems have the potential to facilitate the more economical management and maintenance of mode...... hiện toàn bộ
Công nghệ giám sát sức khỏe công trình (SHM) đã được ứng dụng thành công để hiểu rõ các tải trọng, điều kiện môi trường và hành vi của công trình chịu tác động của các yếu tố khác nhau thông qua việc giải quyết một bài toán ngược. Công nghệ cảm biến là một phần quan trọng của SHM. Trong bài báo này, sự phát triển của công nghệ cảm biến tiên tiến và các loại cảm biến tại Trung Quốc Đại Lục trong th...... hiện toàn bộ
#giám sát sức khỏe công trình #cảm biến #công nghệ cảm biến #Trung Quốc đại lục #kỹ thuật động đất #kỹ thuật gió #ăn mòn #hiệu suất vòng đời #PZT #sợi quang #xi măng thông minh.
Mahmoud Reda Taha, Aboelmagd Noureldin, Jonathan L. Lucero, Thomas J. Baca
The strategic and monetary value of the civil infrastructure worldwide necessitates the development of structural health monitoring (SHM) systems that can accurately monitor structural response due to real-time loading conditions, detect damage in the structure, and report the location and nature of this damage. In the last decade, extensive research has been carried out for developing vi...... hiện toàn bộ
Wayside detection monitors critical parameters relating to the condition of in-service railway vehicles. Economic decisions about the maintenance of vehicles can be made, and servicing can occur when a particular vehicle is likely to cause even small amounts of damage to the track, to itself, or when the cost of damage is significant, such as in catastrophic failure. Veh...... hiện toàn bộ
Structural health monitoring relies on the repeated observation of damage-sensitive features such as strains or natural frequencies. A major problem is that regular changes in temperature, relative humidity, operational loading, and so on also influence those features. This influence is in general nonlinear and it affects different features in a different way. In this article, an improved...... hiện toàn bộ
Christof Devriendt, Filipe Magalhães, Wout Weijtjens, Gert De Sitter, Álvaro Cunha, Patrick Guillaume
This article will present and discuss the approach and the first results of a long-term dynamic monitoring campaign on an offshore wind turbine in the Belgian North Sea. It focuses on the vibration levels and modal parameters of the fundamental modes of the support structure. These parameters are crucial to minimize the operation and maintenance costs and to extend the lifetime of offshor...... hiện toàn bộ
Sung‐Wan Kim, Bub-Gyu Jeon, Nam-Sik Kim, Jong-Chil Park
Because of the characteristics of cable-supported bridges, the cable tensile force is considered a critical item in their maintenance. In particular, because the evaluation of the cable tensile force in a cable-stayed bridge is essential for understanding the general status of the structural system, identifying the initial values of this force in the construction of a bridge and then accu...... hiện toàn bộ
This paper presents a novel approach to detect structural damage based on combining independent component analysis (ICA) extraction of time domain data and artificial neural networks (ANN). The advantage of using time history measurements is that the original vibration information is used directly. However, the volume of data, measurement noise and the lack of reliable feature extraction ...... hiện toàn bộ