scholarly journals CASE STUDY OF STRUCTURAL HEALTH MONITORING IN INDIA AND ITS BENEFITS

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.

scholarly journals Piezoelectric Transducer-Based Structural Health Monitoring for Aircraft Applications

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 545 ◽  
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.

scholarly journals Ultrasonic Structural Health Monitoring Using Fiber Bragg Grating

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3395 ◽  
Author(s):  
Qi Wu ◽  
Yoji Okabe ◽  
Fengming Yu
Keyword(s):  
Structural Health Monitoring ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Waveform Analysis ◽  
Bragg Grating ◽  
Ultrasonic Detection ◽  
Practical Applications ◽  
Structural Health ◽  
Fbg Sensor ◽  
Industrial Sectors

The fiber Bragg grating (FBG) sensor, which was developed over recent decades, has been widely used to measure manifold static measurands in a variety of industrial sectors. Multiple experiments have demonstrated its ability in ultrasonic detection and its potential in ultrasonic structural health monitoring. Unlike static measurements, ultrasonic detection requires a higher sensitivity and broader bandwidth to ensure the fidelity of the ultrasonic Lamb wave that propagates in a plate-like structure for the subsequent waveform analysis. Thus, the FBG sensor head and its corresponding demodulation system need to be carefully designed, and other practical issues, such as the installation methods and data process methods, should also be properly addressed. In this review, the mature techniques of FBG-based ultrasonic sensors and their practical applications in ultrasonic structural health monitoring are discussed. In addition, state-of-the-art techniques are introduced to fully present the current developments.

scholarly journals Validation of a procedure for the evaluation of the performance of an installed structural health monitoring system

2018 ◽  
Vol 18 (5-6) ◽  
pp. 1557-1568 ◽  
Author(s):  
Sebastian Heinlein ◽  
Peter Cawley ◽  
Thomas Vogt
Keyword(s):  
Finite Element ◽  
Structural Health Monitoring ◽  
Damage Detection ◽  
Monitoring System ◽  
Health Monitoring ◽  
Complex Structure ◽  
Detection Ability ◽  
Health Monitoring System ◽  
Structural Health ◽  
Structural Health Monitoring System

Validation of the performance of guided wave structural health monitoring systems is vital if they are to be widely deployed; testing the damage detection ability of a system by introducing different types of damage at varying locations is very costly and cannot be performed on a system in operation. Estimating the damage detection ability of a system solely by numerical simulations is not possible as complex environmental effects cannot be accounted for. In this study, a methodology was tested and verified that uses finite element simulations to superimpose defect signals onto measurements collected from a defect-free structure. These signals are acquired from the structure of interest under varying environmental and operational conditions for an initial monitoring period. Measurements collected in a previous blind trial of an L-shaped pipe section, onto which a number of corrosion-like defects were introduced, were utilised during this investigation. The growth of three of these defects was replicated using finite element analysis and the simulated reflections were superimposed onto signals collected on the defect-free test pipe. The signal changes and limits of reliable detection predicted from the synthetic defect reflections superimposed on the measurements from the undamaged complex structure agreed well with the changes due to real damage measured on the same structure. This methodology is of great value for any structural health monitoring system as it allows for the minimum detectable defect size to be estimated for specific geometries and damage locations in a quick and efficient manner without the need for multiple test structures while accounting for environmental variations.

scholarly journals Specifications and applications of the technical code for monitoring of building and bridge structures in China

2017 ◽  
Vol 9 (1) ◽  
pp. 168781401668427 ◽  
Author(s):  
Y Yang ◽  
QS Li ◽  
BW Yan
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Large Scale ◽  
Monitoring Methods ◽  
Practical Applications ◽  
Technical Parameters ◽  
Monitoring Techniques ◽  
Structural Health ◽  
Bridge Structures ◽  
Complex Engineering

Recently, the exclusive compulsory technical code (GB 50982-2014) for structural health monitoring of buildings and bridges in China has been developed and implemented. This code covers the majority of the field monitoring methods and stipulates the corresponding technical parameters for monitoring of high-rise structures, large-span spatial structures, bridges and base-isolated structures. This article first presents the comprehensive review and linear comparison of existing structural health monitoring codes and standards. Subsequently, the progress of the codification of GB 50982-2014 is imparted and its main features and specifications are summarized. Finally, in accordance with GB50982-2014, several representative structural health monitoring practical applications of large-scale infrastructures in China are exemplified to illustrate how this national code can bridge the gap between theory and practical applications of structural health monitoring. This technical code is an important milestone in the application of well-established structural health monitoring techniques into the realistic and complex engineering projects. Also, it can provide abundant and authoritative information for practitioners and researchers involving the structural health monitoring techniques.

Mechanic Models for Structure Health Monitoring Based on Wireless Sensors Networks Positioning

2014 ◽  
Vol 526 ◽  
pp. 93-98
Author(s):  
Wei Hua Fang
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Complex Structure ◽  
Three Dimensional ◽  
Wireless Sensor ◽  
Structural Health ◽  
Mechanical Models ◽  
Complex Structural

In order to fully utilize the advantages of indoor 3-D positioning of wireless sensor networks, according to the needs of large, complex structural health monitoring, combined with fracture mechanics and continuum mechanics theory, corresponding mechanical models based on wireless sensor network positioning are provided. The models provide health diagnostic criterion for crack stability, as well as large and complex structure. The investigation lays the foundation for three-dimensional positioning technology for wireless sensor networks applications in structural health monitoring and has very important significance.

scholarly journals Image Assisted Total Stations for Structural Health Monitoring—A Review

Geomatics ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 1-16
Author(s):  
Kira Zschiesche
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Measurement Data ◽  
Continuous Method ◽  
Structural Health ◽  
Camera Systems ◽  
Engineering Geodesy ◽  
High Flexibility ◽  
Photogrammetric Measurement

Measuring structures and its documentation is one of the tasks of engineering geodesy. Structural health monitoring (SHM) is defined as a periodic or continuous method to provide information about the condition of the construction through the determination of measurement data and their analysis. In SHM, wide varieties of sensors are used for data acquisition. In the following, the focus is on the application of image assisted total stations (IATS). The combination of tacheometry and photogrammetric measurement offers high flexibility and precision. Different approaches of automated detecting and matching whose applications have been tested in practice are briefly explained. A distinction is made between built-in cameras (commercial) and external camera systems (prototypes). Various successful applications of IATS in the field of SHM are presented and explained.

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