Behaviour of fibre-reinforced concrete structures under seismic loading

The present research is concerned with the modelling of the structural behaviour of steel fibre-reinforced concrete (SFRC) using non-linear finite-element(FE) analysis.Key structural response indicators such as load-deflection curves,strength,stiffness,ductility,energy absorption and cracking were e...

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Main Author:	Sharifah Maszura, Syed Mohsin
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/4744/1/SHARIFAH_MASZURA_BINTI_SYED_MOHSIN.PDF
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id	my-ump-ir.4744
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spelling	my-ump-ir.47442021-08-16T04:24:57Z Behaviour of fibre-reinforced concrete structures under seismic loading 2012-04 Sharifah Maszura, Syed Mohsin TA Engineering (General). Civil engineering (General) The present research is concerned with the modelling of the structural behaviour of steel fibre-reinforced concrete (SFRC) using non-linear finite-element(FE) analysis.Key structural response indicators such as load-deflection curves,strength,stiffness,ductility,energy absorption and cracking were examined.In particular,the potential for fibres to substitute for a reduction in conventional transverse reinforcement was studied.Such reduction is highly desirables in practice as it helps alleviate reinforcement congestion,often experienced in the seismic detailing of critical regions such as beamcolumn joints. Thus two key parameters were considered, namely reducing transverse reinforcement while increasing the amount of fibres.The reduction in conventional reinforcement was achieved mainly by increasing stirrups spacing (and also by reducing double-hoop arrangement commonly used in seismic detailing ofjoints).The behaviour of SFRC structural elements was studied under both monotonic and reversed-cyclic loadings (the latter used to mimic seismic action). Emphasis was initially focused on the study of available experimental data describing the effect of steel fibres on the post-cracking response of concrete.Consequently the SFRC constitutive model proposed by Lok and Xiao (1999) was selected.The numerical model was calibrated against existing experimental data to ensure the reliability of the FE predictions.Subsequently,further analyses were carried out investigating three main case studies namely,simply supported beams,two-span continuous (i.e. statically- indeterminate)columns,and both exterior and interior beam 1 colunm joints.Parametric studies were carried out covering the full practical range of steel fibre dosages and appropriate amounts of reduction in conventional transverse reinforcement.The results show that steel fibres increase the load-carrying capacity and stiffness (thus enhancing response at both the serviceability and ultimate limit states, which are important design considerations).Fibres were found also to improve ductility (as well as altering the mode of failure from a brittle to a ductile one). 2012-04 Thesis http://umpir.ump.edu.my/id/eprint/4744/ http://umpir.ump.edu.my/id/eprint/4744/1/SHARIFAH_MASZURA_BINTI_SYED_MOHSIN.PDF application/pdf en public phd doctoral Imperial College London Department of Civil and Environmental Engineering
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Sharifah Maszura, Syed Mohsin Behaviour of fibre-reinforced concrete structures under seismic loading
description	The present research is concerned with the modelling of the structural behaviour of steel fibre-reinforced concrete (SFRC) using non-linear finite-element(FE) analysis.Key structural response indicators such as load-deflection curves,strength,stiffness,ductility,energy absorption and cracking were examined.In particular,the potential for fibres to substitute for a reduction in conventional transverse reinforcement was studied.Such reduction is highly desirables in practice as it helps alleviate reinforcement congestion,often experienced in the seismic detailing of critical regions such as beamcolumn joints. Thus two key parameters were considered, namely reducing transverse reinforcement while increasing the amount of fibres.The reduction in conventional reinforcement was achieved mainly by increasing stirrups spacing (and also by reducing double-hoop arrangement commonly used in seismic detailing ofjoints).The behaviour of SFRC structural elements was studied under both monotonic and reversed-cyclic loadings (the latter used to mimic seismic action). Emphasis was initially focused on the study of available experimental data describing the effect of steel fibres on the post-cracking response of concrete.Consequently the SFRC constitutive model proposed by Lok and Xiao (1999) was selected.The numerical model was calibrated against existing experimental data to ensure the reliability of the FE predictions.Subsequently,further analyses were carried out investigating three main case studies namely,simply supported beams,two-span continuous (i.e. statically- indeterminate)columns,and both exterior and interior beam 1 colunm joints.Parametric studies were carried out covering the full practical range of steel fibre dosages and appropriate amounts of reduction in conventional transverse reinforcement.The results show that steel fibres increase the load-carrying capacity and stiffness (thus enhancing response at both the serviceability and ultimate limit states, which are important design considerations).Fibres were found also to improve ductility (as well as altering the mode of failure from a brittle to a ductile one).
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Sharifah Maszura, Syed Mohsin
author_facet	Sharifah Maszura, Syed Mohsin
author_sort	Sharifah Maszura, Syed Mohsin
title	Behaviour of fibre-reinforced concrete structures under seismic loading
title_short	Behaviour of fibre-reinforced concrete structures under seismic loading
title_full	Behaviour of fibre-reinforced concrete structures under seismic loading
title_fullStr	Behaviour of fibre-reinforced concrete structures under seismic loading
title_full_unstemmed	Behaviour of fibre-reinforced concrete structures under seismic loading
title_sort	behaviour of fibre-reinforced concrete structures under seismic loading
granting_institution	Imperial College London
granting_department	Department of Civil and Environmental Engineering
publishDate	2012
url	http://umpir.ump.edu.my/id/eprint/4744/1/SHARIFAH_MASZURA_BINTI_SYED_MOHSIN.PDF
_version_	1783731912689319936

Behaviour of fibre-reinforced concrete structures under seismic loading

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