Structural health monitoring applications for marine infrastructure PDF

REVIEW OF
“STRUCTURAL HEALTH MONITORING APPLICATIONS FOR MARINE
INFRASTRUCTURE”
YOUR NAME
Griffith School of Engineering, Griffith University, Gold Coast, QLD4222, Australia
This paper presents a review of structural health monitoring applications for marine infrastructure. Structural Health
Monitoring is geared towards providing at any given moment during the life period of a structure, a diagnosis of the state
each of the materials, of the various parts as well as of the entire assembly of such parts that make up the structure as a
whole. It is a requirement that the state of the structure has to remain within the specified domain in the design even
though this may be changed by normal aging owing to usage, by environmental action or even by accidental occurrences.
Keywords: structural health monitoring, sensing
technology, system identification, infrastructure,
signal processing
1.The Research Context
Utilization of main infrastructures among them
large-scale space structures, high-rise building
as well as long-span bridges has gained
momentum leading to the need of a more
accurate as well as robust structural health
monitoring methods to enhance safety as well
as reliability while minimizing the cost of
operation and maintenance of the very
infrastructures [1].
1.The Literature Review
1.1. SMART SENSORS
2.1.1. Optical fiber Bragg grating sensors
It is composed of a fiber Bragg gratting, two mounting
supports as well as two gripper tubes. The fiber in either
sides of the FBG is not packaged using epoxy resign in
two gripper tubes that are installed on the mounting
supports using adhesive or solder.
Figure 1: Pictures and Schematic diagram of FBG strain
sensor packed by two gripper tubes
Table 1: Mechanical properties of optical fibre
Piezoelectric transducers
The piezoelectric sensor have been used in structural
healthy monitoring owing to their features of
electromagnetic coupling, low cost, simple structure,
excellent reliability as well as widely frequency
response range.
The PZT sensors may be used both as sensors that can
receive the dynamic or static strain from the host
structures as well as actuators which excite the vibration
as well as elastic wave for the structural health
monitoring system.
Figure 2: Embedded cement based PZT sensor
1