Experimental validation of structural health monitoring for flexible bridge structures

<P>Structural health is a vital aspect of infrastructure sustainability. As a part of a vital infrastructure and transportation network, bridge structures must function safely at all times. However, due to heavier and faster moving vehicular loads and function adjustment, such as Busway accommodation, many bridges are now operating at an overload beyond their design capacity. Additionally, the huge renovation and replacement costs are a difficult burden for infrastructure owners. The structural health monitoring (SHM) systems proposed recently are incorporated with vibration-based damage detection techniques, statistical methods and signal processing techniques and have been regarded as efficient and economical ways to assess bridge condition and foresee probable costly failures. In this chapter, the recent developments in damage detection and condition assessment techniques based on vibration-based damage detection and statistical methods are reviewed. The vibration-based damage detection methods based on changes in natural frequencies, curvature or strain modes, modal strain energy, dynamic flexibility, artificial neural networks, before and after damage, and other signal processing methods such as Wavelet techniques, empirical mode decomposition and Hilbert spectrum methods are discussed in this chapter.   </P>

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Optimized Actuator/Sensor Combinations for Structural Health Monitoring: Simulation and Experimental Validation

10.12783/shm2015/128 ◽

2015 ◽

Author(s):

SRIDARAN VENKAT ◽

C. BOLLER ◽

N.B. RAVI ◽

N. CHAKRABORTY ◽

G.S. KAMALAKAR ◽

...

Keyword(s):

Structural Health Monitoring ◽

Health Monitoring ◽

Experimental Validation ◽

Structural Health

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

Advances in Mechanical Engineering ◽

10.1177/1687814016684272 ◽

2017 ◽

Vol 9 (1) ◽

pp. 168781401668427 ◽

Cited By ~ 8

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.

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Design and Experimental Validation of a Structural Health Monitoring Fastener

Volume 10: Mechanics of Solids and Structures, Parts A and B ◽

10.1115/imece2007-43414 ◽

2007 ◽

Author(s):

Alexi Rakow ◽

Fu-Kuo Chang

Keyword(s):

Structural Health Monitoring ◽

Eddy Current ◽

Health Monitoring ◽

Experimental Validation ◽

Early Stage ◽

Fatigue Cracks ◽

Flaw Detection ◽

In Situ Monitoring ◽

Structural Health ◽

Current Sensors

In this study a structural health monitoring (SHM) fastener, with built-in eddy current sensors for in-situ monitoring of fatigue cracks at hole locations in layered metallic joints was developed. This presents an optimal method of sensor integration for early stage detection of these cracks, which are among of the most common forms of damage in airframes. Thin, conformable eddy current sensors optimized for in-hole flaw detection [1] and a method of mechanical integration and complete data acquisition and software system are discussed. Results from fatigue tests of single layer and multi-layer specimens are presented in addition to results from bench-top flaw detection tests as a means of experimental validation of the system.

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