Integrated structural health monitoring for load detection using modern NDT techniques

All structures, including critical civil infrastructure facilities like bridges and tunnels, deteriorate with time due to numerous reasons such as fatigue failure caused by repetitive loads and effects of environmental conditions. As a result, Structural Health Monitoring (SHM) is emerging as an imp...

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Main Author: Seah, Wen Fang
Other Authors: Soh Chee Kiong
Format: Final Year Project
Language:English
Published: 2018
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Online Access:http://hdl.handle.net/10356/74571
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-745712023-03-03T17:01:29Z Integrated structural health monitoring for load detection using modern NDT techniques Seah, Wen Fang Soh Chee Kiong School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering All structures, including critical civil infrastructure facilities like bridges and tunnels, deteriorate with time due to numerous reasons such as fatigue failure caused by repetitive loads and effects of environmental conditions. As a result, Structural Health Monitoring (SHM) is emerging as an important aspect for sustainable management of infrastructure systems, through continuous monitoring of a structure to provide an appraisal of changes as a function of time and serves as an early warning of an unsafe condition using real-time data. It involves the integration of sensors, data transmission and processing ability inside the structure. Nonetheless, extant non-destructive SHM techniques such as Lamb waves propagation and Electro-Mechanical Impedance (EMI) techniques can enhance the efficiency of damage detection through amalgamation. In this venture, Lamb waves propagation technique was further explored. Lamb waves are produced by pulsed ultrasound generated using a piezoelectric actuator to acquire information of the host structure though piezoelectric sensor. Lamb waves are known to be a surface wave, but recent finding claims that Lamb waves are spherical waves that have air-surface and air-air properties. This is expected to be advantageous when executing SHM in inaccessible areas. EMI and Lamb waves propagation techniques were integrated together to determine discontinuity in structures and amplify the results to achieve effective SHM. Hence, more experiments were carried out to substantiate this discovery and how structures of different dimensions give different waveforms. Statistical analysis in the form of transient energy was conducted to relate the damage severity with varying gap distance and the distance between the sensor and actuator. Bachelor of Engineering (Civil) 2018-05-21T13:43:51Z 2018-05-21T13:43:51Z 2018 Final Year Project (FYP) http://hdl.handle.net/10356/74571 en Nanyang Technological University 70 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering
spellingShingle DRNTU::Engineering::Civil engineering
Seah, Wen Fang
Integrated structural health monitoring for load detection using modern NDT techniques
description All structures, including critical civil infrastructure facilities like bridges and tunnels, deteriorate with time due to numerous reasons such as fatigue failure caused by repetitive loads and effects of environmental conditions. As a result, Structural Health Monitoring (SHM) is emerging as an important aspect for sustainable management of infrastructure systems, through continuous monitoring of a structure to provide an appraisal of changes as a function of time and serves as an early warning of an unsafe condition using real-time data. It involves the integration of sensors, data transmission and processing ability inside the structure. Nonetheless, extant non-destructive SHM techniques such as Lamb waves propagation and Electro-Mechanical Impedance (EMI) techniques can enhance the efficiency of damage detection through amalgamation. In this venture, Lamb waves propagation technique was further explored. Lamb waves are produced by pulsed ultrasound generated using a piezoelectric actuator to acquire information of the host structure though piezoelectric sensor. Lamb waves are known to be a surface wave, but recent finding claims that Lamb waves are spherical waves that have air-surface and air-air properties. This is expected to be advantageous when executing SHM in inaccessible areas. EMI and Lamb waves propagation techniques were integrated together to determine discontinuity in structures and amplify the results to achieve effective SHM. Hence, more experiments were carried out to substantiate this discovery and how structures of different dimensions give different waveforms. Statistical analysis in the form of transient energy was conducted to relate the damage severity with varying gap distance and the distance between the sensor and actuator.
author2 Soh Chee Kiong
author_facet Soh Chee Kiong
Seah, Wen Fang
format Final Year Project
author Seah, Wen Fang
author_sort Seah, Wen Fang
title Integrated structural health monitoring for load detection using modern NDT techniques
title_short Integrated structural health monitoring for load detection using modern NDT techniques
title_full Integrated structural health monitoring for load detection using modern NDT techniques
title_fullStr Integrated structural health monitoring for load detection using modern NDT techniques
title_full_unstemmed Integrated structural health monitoring for load detection using modern NDT techniques
title_sort integrated structural health monitoring for load detection using modern ndt techniques
publishDate 2018
url http://hdl.handle.net/10356/74571
_version_ 1759856448495419392