Structural performance of cold-formed steel with self-compacting concrete in a composite beam system

The use of composite systems comprising of concrete and hot-rolled steel (HRS) sections is well established as observed in current design codes. But, there is limited technical information available about the use of composite systems that incorporates the use of light gauge steel sections, despite t...

Full description

Saved in:

Bibliographic Details
Main Author:	Muhammad Lawan, Mustapha
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/77762/1/MustaphaMuhammadLawanPFKA2015.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.77762
record_format	uketd_dc
spelling	my-utm-ep.777622018-07-04T11:43:06Z Structural performance of cold-formed steel with self-compacting concrete in a composite beam system 2015-12 Muhammad Lawan, Mustapha TA Engineering (General). Civil engineering (General) The use of composite systems comprising of concrete and hot-rolled steel (HRS) sections is well established as observed in current design codes. But, there is limited technical information available about the use of composite systems that incorporates the use of light gauge steel sections, despite the potentials of the system in residential and light industrial constructions. Therefore, this research work investigated the structural performance of cold-formed steel (CFS) section with Self-Compacting Concrete (SCC) as a composite beam system, by means of shear connection mechanism of bolted shear connectors. The study comprised two components; experimental and theoretical works. The experimental work consisted of two phases; push-out and full-scale experimental tests. The push-out specimens were of the same dimension (800 mm x 600 mm x 75 mm). In push-out test, strength capability and ductility of the proposed bolted shear connectors were determined. Bolted shear connectors of M16, M14 and M12 of grade 8.8 were installed on the flanges of I-beam section of CFS using single nut and washer above and beneath through bolt holes of 17 mm, 15 mm and 13 mm diameters at a designated longitudinal interval of 150 mm, 250 mm and 300 mm respectively, and spaced laterally at 75 mm. The specimens were cast with SCC of grade 40 N/ mm2. Shear connector size and longitudinal spacing were the varied parameters, and their influence on the ultimate load capacity was investigated. The results showed that the size and the longitudinal spacing of the shear connectors had significantly influenced the ultimate load capacity. Ductility of the shear connectors was determined to be acceptable as an average characteristic slip capacity above 6 mm as recommended by Eurocode 4 was achieved by all shear connectors. Close agreement was recorded between experimental and theoretical values based on Eurocode 4 equations. In full-scale test program, longitudinal spacing employed was 250 mm and 300 mm excluding 150 mm spacing due to overlapping of stress fields as established in push-out test that led to strength reduction. The full-scale specimens were of the same dimension (4500 mm x 1500 mm x 75 mm) and were tested using a four-point bending test. The results showed that the ultimate load and ultimate moment capacities were influenced by the studied parameters as established in push-out test. Results of comparison between experimental and theoretical values revealed good agreement. In conclusion, the CFS-SCC composite beam system can be employed in small and medium size buildings, and in light weight construction industry. 2015-12 Thesis http://eprints.utm.my/id/eprint/77762/ http://eprints.utm.my/id/eprint/77762/1/MustaphaMuhammadLawanPFKA2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:95159 phd doctoral Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Muhammad Lawan, Mustapha Structural performance of cold-formed steel with self-compacting concrete in a composite beam system
description	The use of composite systems comprising of concrete and hot-rolled steel (HRS) sections is well established as observed in current design codes. But, there is limited technical information available about the use of composite systems that incorporates the use of light gauge steel sections, despite the potentials of the system in residential and light industrial constructions. Therefore, this research work investigated the structural performance of cold-formed steel (CFS) section with Self-Compacting Concrete (SCC) as a composite beam system, by means of shear connection mechanism of bolted shear connectors. The study comprised two components; experimental and theoretical works. The experimental work consisted of two phases; push-out and full-scale experimental tests. The push-out specimens were of the same dimension (800 mm x 600 mm x 75 mm). In push-out test, strength capability and ductility of the proposed bolted shear connectors were determined. Bolted shear connectors of M16, M14 and M12 of grade 8.8 were installed on the flanges of I-beam section of CFS using single nut and washer above and beneath through bolt holes of 17 mm, 15 mm and 13 mm diameters at a designated longitudinal interval of 150 mm, 250 mm and 300 mm respectively, and spaced laterally at 75 mm. The specimens were cast with SCC of grade 40 N/ mm2. Shear connector size and longitudinal spacing were the varied parameters, and their influence on the ultimate load capacity was investigated. The results showed that the size and the longitudinal spacing of the shear connectors had significantly influenced the ultimate load capacity. Ductility of the shear connectors was determined to be acceptable as an average characteristic slip capacity above 6 mm as recommended by Eurocode 4 was achieved by all shear connectors. Close agreement was recorded between experimental and theoretical values based on Eurocode 4 equations. In full-scale test program, longitudinal spacing employed was 250 mm and 300 mm excluding 150 mm spacing due to overlapping of stress fields as established in push-out test that led to strength reduction. The full-scale specimens were of the same dimension (4500 mm x 1500 mm x 75 mm) and were tested using a four-point bending test. The results showed that the ultimate load and ultimate moment capacities were influenced by the studied parameters as established in push-out test. Results of comparison between experimental and theoretical values revealed good agreement. In conclusion, the CFS-SCC composite beam system can be employed in small and medium size buildings, and in light weight construction industry.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Muhammad Lawan, Mustapha
author_facet	Muhammad Lawan, Mustapha
author_sort	Muhammad Lawan, Mustapha
title	Structural performance of cold-formed steel with self-compacting concrete in a composite beam system
title_short	Structural performance of cold-formed steel with self-compacting concrete in a composite beam system
title_full	Structural performance of cold-formed steel with self-compacting concrete in a composite beam system
title_fullStr	Structural performance of cold-formed steel with self-compacting concrete in a composite beam system
title_full_unstemmed	Structural performance of cold-formed steel with self-compacting concrete in a composite beam system
title_sort	structural performance of cold-formed steel with self-compacting concrete in a composite beam system
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/77762/1/MustaphaMuhammadLawanPFKA2015.pdf
_version_	1747817824748830720

Structural performance of cold-formed steel with self-compacting concrete in a composite beam system

Similar Items