scholarly journals Structural health assessment of fire damaged building using non-destructive testing and micro-graphical forensic analysis: A case study

2019 ◽  
Vol 11 ◽  
pp. e00258 ◽  
Author(s):  
Ahmed Aseem ◽  
Waqas Latif Baloch ◽  
Rao Arsalan Khushnood ◽  
Arslan Mushtaq
Keyword(s):  
Health Assessment ◽  
Forensic Analysis ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Structural Health ◽  
Structural Health Assessment ◽  
Non Destructive

12 Years of Structural Health Assessment and Maintenance for the Glulam Timber Structure of the Mormanno Traffic Bridge in Calabria

2013 ◽  
Vol 778 ◽  
pp. 771-778 ◽  
Author(s):  
Giorgio Bignotti
Keyword(s):  
Moisture Content ◽  
Health Assessment ◽  
Timber Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
South Italy ◽  
Structural Health Assessment ◽  
Year 2000 ◽  
Non Destructive ◽  
Timber Bridges

The Mormanno traffic Bridge, built at the end of the year 2000 in South Italy, with its glulam exposed structure spanning around 70 m, is one of the most impressive traffic timber bridges in the world. The paper illustrates the various analysis executed for the assessment of the health of the structure and for the following maintenance actions during the first twelve years of service of the Bridge (2001-2013). In the year 2004 a first visit for the assessment of the health of the timber bridge was decided. A team of experts inspected the bridge in order to check the conditions of the timber structures and register all the damages produced by weathering, fungi and insects on the structural elements. The experts found the decay still limited but recommended a maintenance action capable to stop the initial degenerative process mainly due to a moisture content higher than normal. In the year 2008 [ a new inspection team visited the bridge for the second time in order to check the effectiveness of the measures of protection adopted four years before. Non-destructive testing were used to investigate the health of the main glulam arches. The decay in the members object of the previous maintenance in general had stopped or slowed down, but in some other parts the moisture content was still higher than acceptable and more protections were added. In the following years the maintenance was completed giving the bridge the possibility to extend its service with a sufficient level of safety. The frequent inspections of the bridge structure provided useful information for the maintenance of the Mormanno bridge but also in general for the design of the durability and for the maintenance planning of exposed timber structures. Fig. 1 the Mormanno Bridge in service

scholarly journals Chirplet Transform in Ultrasonic Non-Destructive Testing and Structural Health Monitoring: A Review

2019 ◽  
Vol 9 (1) ◽  
pp. 3778-3781
Author(s):  
M. S. Mohammed ◽  
K. Ki-Seong
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Ultrasonic Signal ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Structural Health ◽  
Chirplet Transform ◽  
Testing Signal ◽  
Short Time ◽  
Non Destructive

Ultrasonic non-destructive testing signal can be decomposed into a set of chirplet signals, which makes the chirplet transform a fitting ultrasonic signal analysis and processing method. Moreover, compared to wavelet transform, short-time Fourier transform and Gabor transform, chirplet transform is a comprehensive signal approximation method, nevertheless, the former methods gained more popularity in the ultrasonic signal processing research. In this paper, the principles of the chirplet transform are explained with a simplified presentation and the studies that used the transform in ultrasonic non-destructive testing and in structural health monitoring are reviewed to expose the existing applications and motivate the research in the potential ones.

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