Structural Health Monitoring of Civil Infrastar

Added on - 01 Apr 2020

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2AbstractMonitoring of the structural integrity of civil infrastructure is increasingly done by the useof structural health monitoring sensors. This research aims at highlighting the techniques set up bythe government of New Zealand and local authorities to monitor the health of structures by the useof wireless sensors.The main goal of this research is to combine the findings of a survey to be conducted and areview of various literatures in the area of structural Health Monitoring (SHM) in New Zealand. Italso attempts to highlight the challenges faced in implementation of SHM, to define theopportunities available in the SHM of civil infrastructure, and to establish the challenges faced inthe use of sensors in SHM of civil infrastructure. The research aims at recommending researchavenues to be pursued towards making the concept of Structural health Monitoring of civilinfrastructure achieve maximum potential in New Zealand.Keywords:Structural health monitoring, Sensors, Civil infrastructure, Level of Service, NewZealandIntroductionCivil infrastructure is very fundamental area when it comes to addressing the prosperity of anysociety. To keep track of the structural integrity of civil infrastructure, and monitor their overallperformance, SHM systems are put into use.Structural Health monitoring involves the use of intelligent sensors and related technologies tocollect a wide array of data and giving an output that will be used to rate the condition of astructure or structural element. SHM systems help in the detection of possible damage on civil
3infrastructure due to natural hazards, aging, and/ or deterioration[ CITATION JMW06 \l 1033 ]1. Thisstudy aims atinvestigating the overall use of sensors for SHM in of asset management, assessmentof structural integrity, risk assessment and scrutinizing of civil infrastructure in New Zealand.Literature reviewSeveral studies in the field of damage detection in civil infrastructure have shown a rising needfor the monitoring of structures such as bridges, dams, tunnels, buildings and other civilinfrastructure.According to Chang, many SHM systems depend on changes in the shape modes and/or thechanges in the resonant frequencies of a structure. This method works by the principle of sensingthe slight variations in a structure. Hence, the variations in a structure due to environmental factorssuch as vibration, temperature variations, or even humidity changes are considered as “noise” inSHM systems. There is a need to make systems that would take measurements other than thoseconsidered as “noise” to the SHM system.Rytter suggests that in New Zealand, SHM is mainly use for damage detection in roadbridges, especially along major highways[ CITATION NZT12 \l 1033 ]4The main areas of applicationfor bridges are: in short span and medium span bridges, for performance checking, operationalhealth and security monitoring, and overall implementation in New Bridges.Further suggests that the level of damage detection and condition rating relies on the system’sability to predict damage and classify it into four general levels:Level 1: ability to sense the occurrence of damage;Level 2: detection of a likely location of destruction;
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