Mini-Symposia (MS10) Structural Safety and Reliability by Means of Structural Health Monitoring

Structural health monitoring for carbon nanotube (CNT)/carbon fiber/epoxy composite was verified by the measurement of electrical resistivity. This study has focused on the preparation of carbon nanotube composite sensors and their application for structural health monitoring. The change of the electrical resistance was measured by a digital multimeter under tensile loads. Although a carbon fiber was broken, the electrical connection was still kept by distributed CNT particles in the model composites. As the number of carbon fiber breakages increased, electrical resistivity was stepwise increased. The CNT composites were well responded with fiber damages during the electro-micromechnical test. Carbon nanotube composites can be useful sensors for structural health monitoring to diagnose a structural safety and to prevent a collapse.

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Research on the Progress of Interdigital Transducer (IDT) for Structural Damage Monitoring

Journal of Sensors ◽

10.1155/2021/6630658 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Wang Ziping ◽

Xiong Xiqiang ◽

Qian Lei ◽

Wang Jiatao ◽

Fei Yue ◽

...

Keyword(s):

Structural Health Monitoring ◽

Health Monitoring ◽

Structural Damage ◽

Large Scale ◽

Safety Information ◽

Health And Safety ◽

Guided Wave ◽

Structural Safety ◽

Structural Health ◽

Damage Monitoring

In the application of Structural Health Monitoring (SHM) methods and related technologies, the transducer used for electroacoustic conversion has gradually become a key component of SHM systems because of its unique function of transmitting structural safety information. By comparing and analyzing the health and safety of large-scale structures, the related theories and methods of Structural Health Monitoring (SHM) based on ultrasonic guided waves are studied. The key technologies and research status of the interdigital guided wave transducer arrays which used for structural damage detection are introduced. The application fields of interdigital transducers are summarized. The key technical and scientific problems solved by IDT for Structural Damage Monitoring (SHM) are presented. Finally, the development of IDT technology and this research project are summarised.

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Piezoelectric Transducer-Based Structural Health Monitoring for Aircraft Applications

Sensors ◽

10.3390/s19030545 ◽

2019 ◽

Vol 19 (3) ◽

pp. 545 ◽

Cited By ~ 84

Author(s):

Xinlin Qing ◽

Wenzhuo Li ◽

Yishou Wang ◽

Hu Sun

Keyword(s):

Structural Health Monitoring ◽

Health Monitoring ◽

Piezoelectric Transducer ◽

Piezoelectric Materials ◽

Development Trend ◽

Practical Implementation ◽

Damage State ◽

Structural Health ◽

Safety And Reliability ◽

Aircraft Application

Structural health monitoring (SHM) is being widely evaluated by the aerospace industry as a method to improve the safety and reliability of aircraft structures and also reduce operational cost. Built-in sensor networks on an aircraft structure can provide crucial information regarding the condition, damage state and/or service environment of the structure. Among the various types of transducers used for SHM, piezoelectric materials are widely used because they can be employed as either actuators or sensors due to their piezoelectric effect and vice versa. This paper provides a brief overview of piezoelectric transducer-based SHM system technology developed for aircraft applications in the past two decades. The requirements for practical implementation and use of structural health monitoring systems in aircraft application are then introduced. State-of-the-art techniques for solving some practical issues, such as sensor network integration, scalability to large structures, reliability and effect of environmental conditions, robust damage detection and quantification are discussed. Development trend of SHM technology is also discussed.

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Structural Health Monitoring on Real Scale Model of a Masonry Triumphal Arch

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.347.279 ◽

2007 ◽

Vol 347 ◽

pp. 279-284

Author(s):

Giovanni Damonte ◽

Stefano Podestà ◽

Giuseppe Riotto ◽

Sergio Lagomarsino ◽

Georges Magonette ◽

...

Keyword(s):

Structural Health Monitoring ◽

Health Monitoring ◽

Dynamic Behaviour ◽

Structural Safety ◽

Scale Model ◽

Research Centre ◽

Structural Dynamic ◽

Measurement Variability ◽

Structural Health ◽

Real Scale

Monitoring represents one solution for the safeguard of historical buildings. The need for a non-destructive and comprehensive monitoring methodology suggests using related to Structural Health Monitoring. This paper is intended to present the outcomes of an experimental campaign on a masonry triumphal arch representing a real scale model of a church part, which was built outside ELSA laboratory at the Joint Research Centre of European Commission. This study aims to evaluate the damage pattern of the structure through simplified dynamic methods producing a quick evaluation of structural safety, easy to use on real cases. As in traditional monitoring, both the instrumentation precision and the measurement variability due to the different testing condition (e.g. ambient conditions) have to be considered. The related effects on the structural dynamic behaviour were analysed and evaluated in order to distinguish an effective change in the “structural health” (a real damage) from an alteration caused by external conditions (a “false positive”). Once studied such effects, settlements were induced to one column base through an “ad hoc” device. Varying the settlement width, three damage levels were obtained in the structure. For each state the structural dynamic properties and their variation were evaluated. Sensitivity of dynamic behaviour to structural damage and to its changes was analysed comparing the results for each level.

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Safety and Reliability Evaluations of Bridge Behaviors under Ambient Truck Loads through Structural Health Monitoring and Identification Model Approaches

Measurement ◽

10.1016/j.measurement.2021.110234 ◽

2021 ◽

pp. 110234

Author(s):

Mosbeh R.Kaloop ◽

Mohammed Eldiasty ◽

Jong Wan Hu

Keyword(s):

Structural Health Monitoring ◽

Health Monitoring ◽

Structural Health ◽

Safety And Reliability ◽

Identification Model

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Damage Identification for Large Span Structure Based on Multiscale Inputs to Artificial Neural Networks

The Scientific World JOURNAL ◽

10.1155/2014/540806 ◽

2014 ◽

Vol 2014 ◽

pp. 1-12 ◽

Cited By ~ 1

Author(s):

Wei Lu ◽

Jun Teng ◽

Yan Cui

Keyword(s):

Neural Networks ◽

Artificial Neural Networks ◽

Structural Health Monitoring ◽

Health Monitoring ◽

Damage Identification ◽

Structural Safety ◽

Noisy Environments ◽

Large Span ◽

Structural Health ◽

Artificial Neural

In structural health monitoring system, little research on the damage identification from different types of sensors applied to large span structure has been done in the field. In fact, it is significant to estimate the whole structural safety if the multitype sensors or multiscale measurements are used in application of structural health monitoring and the damage identification for large span structure. A methodology to combine the local and global measurements in noisy environments based on artificial neural network is proposed in this paper. For a real large span structure, the capacity of the methodology is validated, including the decision on damage placement, the discussions on the number of the sensors, and the optimal parameters for artificial neural networks. Furthermore, the noisy environments in different levels are simulated to demonstrate the robustness and effectiveness of the proposed approach.

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An Eddy Current-Based Structural Health Monitoring Technique for Tracking Bolt Cracking

Sensors ◽

10.3390/s20236843 ◽

2020 ◽

Vol 20 (23) ◽

pp. 6843

Author(s):

Hu Sun ◽

Tao Wang ◽

Dawei Lin ◽

Yishou Wang ◽

Xinlin Qing

Keyword(s):

Structural Health Monitoring ◽

Eddy Current ◽

Health Monitoring ◽

Large Scale ◽

Crack Depth ◽

Structural Safety ◽

Induced Voltage ◽

Coil Array ◽

Structural Health ◽

Monitoring Technique

Bolted joints are the primary structures for the load transfer of large-scale structures. It is vital to monitor the process of bolt cracking for enduring structural safety. In this paper, a structural health monitoring technique based on the embedding eddy current sensing film has been proposed to quantify the crack parameters of bolt cracking. Two configurations of the sensing film containing one-dimensional circumferential coil array and two-dimensional coil array are designed and verified to have the ability to identify three crack parameters: the crack angle, the crack depth, and the crack location in the axial direction of the bolt. The finite element method has been employed not only to verify the capacity of the sensing film, but also to investigate the interaction between the crack and the eddy current/magnetic field. It has been demonstrated that as the crack propagates, the variations of the induced voltage of the sensing coils are influenced by both eddy current effect and magnetic flux leakage, which play different roles in the different periods of the crack propagation. Experiments have been performed to verify the effectiveness and feasibility of the sensing film to quantify three crack parameters in the process of the bolt cracking.

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EVALUATION OF VIBRATION-BASED GLOBAL STRUCTURAL HEALTH MONITORING METHOD FOR MEDIUM-RISE BUILDINGS

Environment Technology Resources Proceedings of the International Scientific and Practical Conference ◽

10.17770/etr2021vol1.6598 ◽

2021 ◽

Vol 1 ◽

pp. 55-61

Author(s):

Liga Gaile ◽

Ivars Radins

Keyword(s):

Reinforced Concrete ◽

Structural Health Monitoring ◽

Health Monitoring ◽

Natural Frequencies ◽

Construction And Demolition Waste ◽

Structural Safety ◽

Reinforced Concrete Buildings ◽

Monitoring Method ◽

Concrete Buildings ◽

Structural Health

The automated monitoring of a building’s structural health during its exploitation is a way to extend its design life without compromising structural safety. In turn, it helps increase the rate of building renovation works compared to demolition works, which reduces future construction and demolition waste levels.This research explores the vibration-based global monitoring method application to structurally stiff medium-rise reinforced concrete buildings by analysing predicted building vibration amplitudes and spectrum under regular city traffic excitation. These predictions are based on the results obtained from finite element calculations of building models with variated structural stiffness and inertial mass of the building.Regular traffic-generated ground frequency spectrum differs from the first natural frequencies of medium-rise reinforced concrete buildings, and the vibration energy is low. Nevertheless, it is found that the structural identification of such building dynamic parameters is still possible, particularly natural frequencies. It was found that the ratio between fundamental frequency for the fixed base model of the building and elastic spring foundation model is the decisive parameter for selecting the building part to be monitored. Structural health monitoring vibration-based methods are also a promising technology for medium-rise mass house buildings when tailored according to some damage sensitive feature.

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CASE STUDY OF STRUCTURAL HEALTH MONITORING IN INDIA AND ITS BENEFITS

Journal of Civil Engineering Science and Technology ◽

10.33736/jcest.1769.2020 ◽

2020 ◽

Vol 11 (1) ◽

pp. 1-7

Author(s):

Riya Bhandari

Keyword(s):

Structural Health Monitoring ◽

Health Monitoring ◽

Complex Structure ◽

Modern World ◽

Practical Applications ◽

Structural Health ◽

Construction Methods ◽

Safety And Reliability ◽

Civil Sector

In today’s modern world, the development is at its peak. Due to increasing development, thousands of new buildings, tunnels, bridges, expressways, and many challenging and complex structure are being made day by day for suiting the increasing needs of people. The development is also seen in the new materials and techniques used in construction methods. Due to this increasing construction of vast structures, the analysis of structures has also become a major challenge as maintaining the integrity of the structure is of utmost importance. Traditional methods of structure analysis are not much beneficial and are not sufficient enough. Structural health monitoring (SHM) is a great development in the analysis of the structures for damage detection and determination of cracks and defects present in the structure. SHM system improves the safety and reliability of the structures; reduce maintenance costs and also helps in extending the useful life of the structures. Still the practical applications of this method are not much used and are still behind in the civil sector in India.

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