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Analysis of Ferrocement and Textile Reinforced Concrete for Shell Structures

Bezbradica, Mile LU (2015) In TVSM VSM820 20151
Structural Mechanics
Department of Construction Sciences
Abstract
The purpose of this master’s thesis is to investigate the stiffness properties of three reinforcement materials for concrete shell structures: ferrocement, glass-fibre textile and carbon-fibre textile. Three types of strategies were used to analyse the properties of the materials, an analytical model, experimental beam prototypes and a numerical analysis. Immediate comparison of the mechanical experiments with the numerical models revealed stiffness deviations of 38% for the ferrocement, 272% for the glass and 211% for the carbon textile reinforced beam, respectively. Ferrocement is the stiffest material according to the mechanical tests. However, the results from the analytical and numerical models show that the carbon reinforced beam has... (More)
The purpose of this master’s thesis is to investigate the stiffness properties of three reinforcement materials for concrete shell structures: ferrocement, glass-fibre textile and carbon-fibre textile. Three types of strategies were used to analyse the properties of the materials, an analytical model, experimental beam prototypes and a numerical analysis. Immediate comparison of the mechanical experiments with the numerical models revealed stiffness deviations of 38% for the ferrocement, 272% for the glass and 211% for the carbon textile reinforced beam, respectively. Ferrocement is the stiffest material according to the mechanical tests. However, the results from the analytical and numerical models show that the carbon reinforced beam has the highest stiffness. Because of the disparity between results from the numerical and the mechanical model, the overall comparison is inconclusive. Possible causes are the influence of microcracks on the bond between the reinforcement and concrete as well as deviations of the concrete thickness of the physical samples. Future research should focus on assumptions in the material properties, numerical model and hand labour to be able to more properly investigate the actual stiffness of the three composite materials. (Less)
Abstract (Swedish)
Detta examensarbete undersöker styvhetsegenskaperna för tre armeringsmaterial: ferrocement, glasfiber- och kolfibertextilarmering, tillämpade för skalkonstruktioner. En av de strategier som användes för undersökningen var ett mekaniskt försök med kompositarmerade betongbalkar. Det mekaniska försöket skulle sedan verifieras med numeriska och analytiska modeller. Jämförelser mellan de mekaniska och numeriska resultaten gav avvikelser på 38 % för ferrocement, 272 % för glasfiberarmeringen respektive 211 % för kolfiberarmeringen. Enligt det mekaniska testet är ferrocement det styvaste materialet. Trots det visar resultaten från de analytiska och numeriska modellerna att kolfiberkompositen har den högsta styvheten. Slutsatsen utifrån detta är... (More)
Detta examensarbete undersöker styvhetsegenskaperna för tre armeringsmaterial: ferrocement, glasfiber- och kolfibertextilarmering, tillämpade för skalkonstruktioner. En av de strategier som användes för undersökningen var ett mekaniskt försök med kompositarmerade betongbalkar. Det mekaniska försöket skulle sedan verifieras med numeriska och analytiska modeller. Jämförelser mellan de mekaniska och numeriska resultaten gav avvikelser på 38 % för ferrocement, 272 % för glasfiberarmeringen respektive 211 % för kolfiberarmeringen. Enligt det mekaniska testet är ferrocement det styvaste materialet. Trots det visar resultaten från de analytiska och numeriska modellerna att kolfiberkompositen har den högsta styvheten. Slutsatsen utifrån detta är att antagandena från de numeriska och mekaniska studierna kan ha påverkats av vidhäftningsproblem mellan armering och betong. Dessutom kan resultaten också ha påverkats av de olika tvärsnittstjocklekarna på betongen från det mekaniska testet. Fokus på materialegenskaper, numerisk modellering och praktisk armeringsteknik krävs i framtida undersökningar för att styvheten för de tre kompositmaterialen ska kunna bestämmas. (Less)
Please use this url to cite or link to this publication:
author
Bezbradica, Mile LU
supervisor
organization
alternative title
Analys av ferrocement och textilarmerad betong för skalkonstruktioner
course
VSM820 20151
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
textile reinforced concrete, shell structures, ferrocement, FEM
publication/series
TVSM
report number
TVSM-5207
ISSN
0281-6679
language
English
id
8830640
alternative location
http://www.byggmek.lth.se/english/publications/tvsm-5000-masters-dissertations/
date added to LUP
2016-03-05 14:03:24
date last changed
2016-03-09 12:09:06
@misc{8830640,
  abstract     = {The purpose of this master’s thesis is to investigate the stiffness properties of three reinforcement materials for concrete shell structures: ferrocement, glass-fibre textile and carbon-fibre textile. Three types of strategies were used to analyse the properties of the materials, an analytical model, experimental beam prototypes and a numerical analysis. Immediate comparison of the mechanical experiments with the numerical models revealed stiffness deviations of 38% for the ferrocement, 272% for the glass and 211% for the carbon textile reinforced beam, respectively. Ferrocement is the stiffest material according to the mechanical tests. However, the results from the analytical and numerical models show that the carbon reinforced beam has the highest stiffness. Because of the disparity between results from the numerical and the mechanical model, the overall comparison is inconclusive. Possible causes are the influence of microcracks on the bond between the reinforcement and concrete as well as deviations of the concrete thickness of the physical samples. Future research should focus on assumptions in the material properties, numerical model and hand labour to be able to more properly investigate the actual stiffness of the three composite materials.},
  author       = {Bezbradica, Mile},
  issn         = {0281-6679},
  keyword      = {textile reinforced concrete,shell structures,ferrocement,FEM},
  language     = {eng},
  note         = {Student Paper},
  series       = {TVSM},
  title        = {Analysis of Ferrocement and Textile Reinforced Concrete for Shell Structures},
  year         = {2015},
}