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The stiffness and strength degradation of timber concrete composite slab deck under repeated loading

TCC (timber-concrete composite) is usually utilised in bridges and flooring system where they are subjected to repeated loadings during their service life, which amplifies the occurrence of fatigue. The American Society of Civil Engineers (ASCE) committee on Fatigue Fracture and Reliability state...

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Main Author: Yeo, Kevin Jit Tong
Format: Thesis
Language:English
English
English
Published: 2021
Subjects:
T Technology (General)
TA401-492 Materials of engineering and construction. Mechanics of materials
Online Access:http://eprints.uthm.edu.my/6440/1/24p%20KEVIN%20YEO%20JIT%20TONG.pdf
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spelling my.uthm.eprints.64402022-02-05T07:30:24Z http://eprints.uthm.edu.my/6440/ The stiffness and strength degradation of timber concrete composite slab deck under repeated loading Yeo, Kevin Jit Tong T Technology (General) TA401-492 Materials of engineering and construction. Mechanics of materials TCC (timber-concrete composite) is usually utilised in bridges and flooring system where they are subjected to repeated loadings during their service life, which amplifies the occurrence of fatigue. The American Society of Civil Engineers (ASCE) committee on Fatigue Fracture and Reliability states that fatigue is related to about 80 percent of structural failures among bridges. The occurrence of fatigue produces a damaging effect on the concrete, timber, and interlayer shear connectors, which ultimately causes the degradation of strength and softening of the TCC structure. However, there is still limited information available on the fatigue behaviour of TCC structures especially its effect at SLS (serviceability-limit state) and ULS (ultimatelimit state). This research was conducted to observe the fatigue behaviour of TCC structural pedestrian bridges or flooring system, in terms of stiffness and strength degradation by applying repeated loadings to the TCC specimens since the TCC is not a homogeneous structure. The research also included testing the strength properties of the Malaysian tropical timber, (Koompasiamalaccensis), which was utilised for the timber component of the TCC specimens, according to the ASTM D198 standard procedures. From this research, no significant changes of the effective stiffness and connection stiffness were observed when the TCC structures were subjected to repeated loadings at SLS (low amplitude) but the degradation process occurred instantaneously when the TCC structures were subjected to repeated loading at ULS (high amplitude). This is because the timber component, concrete component and shear connectors all have varying maximum load capacity and the repeated loading at ULS is very close to the failure load of the concrete component and shear connectors. The generated S-N graph, strain profile and post-mortem analysis provide a summarisation and explanation of the fatigue life behaviour of the TCC specimens while the Finite Element Modelling (FEM) validates the experimental results. 2021-06 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/6440/1/24p%20KEVIN%20YEO%20JIT%20TONG.pdf text en http://eprints.uthm.edu.my/6440/2/KEVIN%20YEO%20JIT%20TONG%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/6440/3/KEVIN%20YEO%20JIT%20TONG%20WATERMARK.pdf Yeo, Kevin Jit Tong (2021) The stiffness and strength degradation of timber concrete composite slab deck under repeated loading. Masters thesis, Universiti Tun Hussein Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
English
English
topic T Technology (General)
TA401-492 Materials of engineering and construction. Mechanics of materials
spellingShingle T Technology (General)
TA401-492 Materials of engineering and construction. Mechanics of materials
Yeo, Kevin Jit Tong
The stiffness and strength degradation of timber concrete composite slab deck under repeated loading
description TCC (timber-concrete composite) is usually utilised in bridges and flooring system where they are subjected to repeated loadings during their service life, which amplifies the occurrence of fatigue. The American Society of Civil Engineers (ASCE) committee on Fatigue Fracture and Reliability states that fatigue is related to about 80 percent of structural failures among bridges. The occurrence of fatigue produces a damaging effect on the concrete, timber, and interlayer shear connectors, which ultimately causes the degradation of strength and softening of the TCC structure. However, there is still limited information available on the fatigue behaviour of TCC structures especially its effect at SLS (serviceability-limit state) and ULS (ultimatelimit state). This research was conducted to observe the fatigue behaviour of TCC structural pedestrian bridges or flooring system, in terms of stiffness and strength degradation by applying repeated loadings to the TCC specimens since the TCC is not a homogeneous structure. The research also included testing the strength properties of the Malaysian tropical timber, (Koompasiamalaccensis), which was utilised for the timber component of the TCC specimens, according to the ASTM D198 standard procedures. From this research, no significant changes of the effective stiffness and connection stiffness were observed when the TCC structures were subjected to repeated loadings at SLS (low amplitude) but the degradation process occurred instantaneously when the TCC structures were subjected to repeated loading at ULS (high amplitude). This is because the timber component, concrete component and shear connectors all have varying maximum load capacity and the repeated loading at ULS is very close to the failure load of the concrete component and shear connectors. The generated S-N graph, strain profile and post-mortem analysis provide a summarisation and explanation of the fatigue life behaviour of the TCC specimens while the Finite Element Modelling (FEM) validates the experimental results.
format Thesis
author Yeo, Kevin Jit Tong
author_facet Yeo, Kevin Jit Tong
author_sort Yeo, Kevin Jit Tong
title The stiffness and strength degradation of timber concrete composite slab deck under repeated loading
title_short The stiffness and strength degradation of timber concrete composite slab deck under repeated loading
title_full The stiffness and strength degradation of timber concrete composite slab deck under repeated loading
title_fullStr The stiffness and strength degradation of timber concrete composite slab deck under repeated loading
title_full_unstemmed The stiffness and strength degradation of timber concrete composite slab deck under repeated loading
title_sort stiffness and strength degradation of timber concrete composite slab deck under repeated loading
publishDate 2021
url http://eprints.uthm.edu.my/6440/1/24p%20KEVIN%20YEO%20JIT%20TONG.pdf
http://eprints.uthm.edu.my/6440/2/KEVIN%20YEO%20JIT%20TONG%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/6440/3/KEVIN%20YEO%20JIT%20TONG%20WATERMARK.pdf
http://eprints.uthm.edu.my/6440/
_version_ 1738581492977631232
score 13.211869

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