A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fatigue of steel-fibre-reinforced concrete prestressed railway sleepers
https://orcid.org/0000-0002-8712-1184
HighlightsSleepers with 0.5% steel fibres demonstrated enhanced fatigue life.Sleepers with 0.5% steel fibres had lower deflection and higher static capacity.Minimum fibre volume is critical for fibre’s efficient structural performance.
AbstractPrestressed concrete sleepers are one of the major components in any railway track system that distributes wheel loads from the rails to the underlying ballast bed. Concrete sleepers are usually designed with an expected life of 50years. However, during their life span, sleepers may experience extreme loading conditions from infrequent but high-magnitude wheel loads produced by a small percentage of “bad” wheels or rail abnormalities. These loads can initiate cracking in the sleepers that reduces durability and increases the risk of fatigue failure of prestressing strands through undergoing millions of cyclic loads. The physical performances of the concrete sleeper such as durability, energy absorption, fatigue and toughness can be improved with the inclusion of steel fibres. This study investigates the efficiency of using steel fibres to improve load carrying capacity and fatigue performance of rail sleepers. Eight prestressed concrete sleepers were tested with fibre contents of zero, 0.25% or 0.5%, by volume, under constant amplitude cyclic and static loading. The sleepers with 0.5% fibres demonstrated higher static capacity and extended fatigue life, lower deflections and finer crack widths than that of sleepers without fibres. The sleepers with 0.25% (20kg/m3) fibres showed variable results and, in some cases, a reduced fatigue performance. It is demonstrated that a minimum volume of fibres is essential to ensure enhanced performance.
Fatigue of steel-fibre-reinforced concrete prestressed railway sleepers
https://orcid.org/0000-0002-8712-1184
HighlightsSleepers with 0.5% steel fibres demonstrated enhanced fatigue life.Sleepers with 0.5% steel fibres had lower deflection and higher static capacity.Minimum fibre volume is critical for fibre’s efficient structural performance.
AbstractPrestressed concrete sleepers are one of the major components in any railway track system that distributes wheel loads from the rails to the underlying ballast bed. Concrete sleepers are usually designed with an expected life of 50years. However, during their life span, sleepers may experience extreme loading conditions from infrequent but high-magnitude wheel loads produced by a small percentage of “bad” wheels or rail abnormalities. These loads can initiate cracking in the sleepers that reduces durability and increases the risk of fatigue failure of prestressing strands through undergoing millions of cyclic loads. The physical performances of the concrete sleeper such as durability, energy absorption, fatigue and toughness can be improved with the inclusion of steel fibres. This study investigates the efficiency of using steel fibres to improve load carrying capacity and fatigue performance of rail sleepers. Eight prestressed concrete sleepers were tested with fibre contents of zero, 0.25% or 0.5%, by volume, under constant amplitude cyclic and static loading. The sleepers with 0.5% fibres demonstrated higher static capacity and extended fatigue life, lower deflections and finer crack widths than that of sleepers without fibres. The sleepers with 0.25% (20kg/m3) fibres showed variable results and, in some cases, a reduced fatigue performance. It is demonstrated that a minimum volume of fibres is essential to ensure enhanced performance.
Fatigue of steel-fibre-reinforced concrete prestressed railway sleepers
https://orcid.org/0000-0002-8712-1184
HighlightsSleepers with 0.5% steel fibres demonstrated enhanced fatigue life.Sleepers with 0.5% steel fibres had lower deflection and higher static capacity.Minimum fibre volume is critical for fibre’s efficient structural performance.
AbstractPrestressed concrete sleepers are one of the major components in any railway track system that distributes wheel loads from the rails to the underlying ballast bed. Concrete sleepers are usually designed with an expected life of 50years. However, during their life span, sleepers may experience extreme loading conditions from infrequent but high-magnitude wheel loads produced by a small percentage of “bad” wheels or rail abnormalities. These loads can initiate cracking in the sleepers that reduces durability and increases the risk of fatigue failure of prestressing strands through undergoing millions of cyclic loads. The physical performances of the concrete sleeper such as durability, energy absorption, fatigue and toughness can be improved with the inclusion of steel fibres. This study investigates the efficiency of using steel fibres to improve load carrying capacity and fatigue performance of rail sleepers. Eight prestressed concrete sleepers were tested with fibre contents of zero, 0.25% or 0.5%, by volume, under constant amplitude cyclic and static loading. The sleepers with 0.5% fibres demonstrated higher static capacity and extended fatigue life, lower deflections and finer crack widths than that of sleepers without fibres. The sleepers with 0.25% (20kg/m3) fibres showed variable results and, in some cases, a reduced fatigue performance. It is demonstrated that a minimum volume of fibres is essential to ensure enhanced performance.
Fatigue of steel-fibre-reinforced concrete prestressed railway sleepers
Parvez, Ahsan (author) / Foster, Stephen James (author)
Engineering Structures ; 141 ; 241-250
2017-03-15
10 pages
Article (Journal)
Electronic Resource
English
Structural safety of railway prestressed concrete sleepers
| Online Contents | 2008
Fatigue resistance of prestressed concrete sleepers
| British Library Conference Proceedings | 1995
Structural safety of railway prestressed concrete sleepers
| British Library Online Contents | 2009
Engineering Index Backfile | 1946
Remaining service life of railway prestressed concrete sleepers
| TIBKAT | 2016