Structural behaviour of end-plate connections on hybrid beam to cruciform column section

Cruciform column section is an innovative column section which consists of two universal beam sections where one of the beams is cut into half along its web and welded onto the web of other beam. Distinct geometrical differences compared to conventional universal H-shaped column section are that the...

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Main Author:	Tan, Boon Cheik
Format:	Thesis
Language:	English
Published:	2020
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/92174/1/TanBoonCheikPSKA2019.pdf.pdf
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id	my-utm-ep.92174
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spelling	my-utm-ep.921742021-08-30T04:22:53Z Structural behaviour of end-plate connections on hybrid beam to cruciform column section 2020 Tan, Boon Cheik TA Engineering (General). Civil engineering (General) Cruciform column section is an innovative column section which consists of two universal beam sections where one of the beams is cut into half along its web and welded onto the web of other beam. Distinct geometrical differences compared to conventional universal H-shaped column section are that the cruciform column has smaller width to depth ratio and lower flange thickness. Its advantages as an alternative vertical compressive member were well proven by previous researchers since 2005. This study focuses on structural behaviour of flush end plate and extended end plate connections of hybrid beam to cruciform column section. Experimental tests of four flush end-plate and four extended end-plate connections on hybrid beam to cruciform column section were conducted and the results were used to validate analytical study and finite element modelling (FEM). Analytical study was conducted based on Eurocode 3: Part 1.8 component method and existing mathematical models. It was found that Eurocode 3: Part 1.8 can be used to predict initial stiffness and moment resistance of cruciform column connections. Existing mathematical models were not able to predict moment rotation behaviour of cruciform column connections but were specifically useful for predicting connection behaviour within the limit of regression model. Hence, comprehensive finite element analysis using ANSYS 14.0 on the cruciform column connections was carried out to predict the moment rotation behaviour. Initial stiffness and moment resistance of the models were in good agreement with experimental test results with percentage difference well within 20%. In terms of failure mode, the deformation shown in FEM exhibited similar pattern with experimental tests and Eurocode 3: Part 1.8. Parametric analysis was carried out using validated FEM model. Critical zones were determined through stress distribution pattern using stress ratio and verified with linear-plastic and semi-rigid partial strength connection behaviour of cruciform column connections. From the parametric analysis, it was identified that the significant parameters for cruciform column connections were beam depth, end-plate thickness, and column flange thickness. Simple mathematical functions were developed to predict moment rotation behaviour of cruciform column connections using regression analysis and were strongly supported by statistical analysis. As compared to existing finite element models, the initial stiffness and moment resistance percentage differences were well within 15% for both single bolt row flush end-plate and extended end-plate cruciform column connections. Based on these outcomes, practising engineers will be able to predict the moment rotation behaviour of cruciform column connection conveniently and accurately using the developed mathematical function. 2020 Thesis http://eprints.utm.my/id/eprint/92174/ http://eprints.utm.my/id/eprint/92174/1/TanBoonCheikPSKA2019.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:134387 phd doctoral Universiti Teknologi Malaysia Faculty of Engineering - School 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) Tan, Boon Cheik Structural behaviour of end-plate connections on hybrid beam to cruciform column section
description	Cruciform column section is an innovative column section which consists of two universal beam sections where one of the beams is cut into half along its web and welded onto the web of other beam. Distinct geometrical differences compared to conventional universal H-shaped column section are that the cruciform column has smaller width to depth ratio and lower flange thickness. Its advantages as an alternative vertical compressive member were well proven by previous researchers since 2005. This study focuses on structural behaviour of flush end plate and extended end plate connections of hybrid beam to cruciform column section. Experimental tests of four flush end-plate and four extended end-plate connections on hybrid beam to cruciform column section were conducted and the results were used to validate analytical study and finite element modelling (FEM). Analytical study was conducted based on Eurocode 3: Part 1.8 component method and existing mathematical models. It was found that Eurocode 3: Part 1.8 can be used to predict initial stiffness and moment resistance of cruciform column connections. Existing mathematical models were not able to predict moment rotation behaviour of cruciform column connections but were specifically useful for predicting connection behaviour within the limit of regression model. Hence, comprehensive finite element analysis using ANSYS 14.0 on the cruciform column connections was carried out to predict the moment rotation behaviour. Initial stiffness and moment resistance of the models were in good agreement with experimental test results with percentage difference well within 20%. In terms of failure mode, the deformation shown in FEM exhibited similar pattern with experimental tests and Eurocode 3: Part 1.8. Parametric analysis was carried out using validated FEM model. Critical zones were determined through stress distribution pattern using stress ratio and verified with linear-plastic and semi-rigid partial strength connection behaviour of cruciform column connections. From the parametric analysis, it was identified that the significant parameters for cruciform column connections were beam depth, end-plate thickness, and column flange thickness. Simple mathematical functions were developed to predict moment rotation behaviour of cruciform column connections using regression analysis and were strongly supported by statistical analysis. As compared to existing finite element models, the initial stiffness and moment resistance percentage differences were well within 15% for both single bolt row flush end-plate and extended end-plate cruciform column connections. Based on these outcomes, practising engineers will be able to predict the moment rotation behaviour of cruciform column connection conveniently and accurately using the developed mathematical function.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Tan, Boon Cheik
author_facet	Tan, Boon Cheik
author_sort	Tan, Boon Cheik
title	Structural behaviour of end-plate connections on hybrid beam to cruciform column section
title_short	Structural behaviour of end-plate connections on hybrid beam to cruciform column section
title_full	Structural behaviour of end-plate connections on hybrid beam to cruciform column section
title_fullStr	Structural behaviour of end-plate connections on hybrid beam to cruciform column section
title_full_unstemmed	Structural behaviour of end-plate connections on hybrid beam to cruciform column section
title_sort	structural behaviour of end-plate connections on hybrid beam to cruciform column section
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Engineering - School of Civil Engineering
publishDate	2020
url	http://eprints.utm.my/id/eprint/92174/1/TanBoonCheikPSKA2019.pdf.pdf
_version_	1747818573531709440

Structural behaviour of end-plate connections on hybrid beam to cruciform column section

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