Details
| Original language | English |
|---|---|
| Article number | 109413 |
| Journal | Engineering Structures |
| Volume | 197 |
| Early online date | 24 Jul 2019 |
| Publication status | Published - 15 Oct 2019 |
Abstract
Aiming to verify the behaviour of ballastless track systems under high compressive rail forces occurring in the vicinity of bridge joints due to track bridge interaction, numerical and experimental studies are described in this paper. At first, a short summary of background information on the allowable rail stresses under compressive force on ballasted track systems is presented. Subsequently, a numerical pre-study for ballastless systems is performed. The unfavourable imperfection cases and loading procedures in transverse direction for experimental tests are determined. Based on these results, two rails are experimentally tested to achieve practical results. To ensure safety and reliability of the system, a specific testing program and a measurement concept are developed. Main testing results including the rail geometry, deformation and stress development are compared and discussed. Additionally, numerical models to evaluate the rail behaviour are improved and verified. A good consistency between the finite element model and the testing results could be achieved. The performed investigations give a scientific basis in order to increase the allowable rail compressive stresses in comparison with the existing values in the codes. A higher allowable rail stress considerably improves the design conditions for long railway bridges.
Keywords
- Allowable rail stresses, Ballastless track, Compression, Experiment, Imperfection, Track bridge interaction
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering Structures, Vol. 197, 109413, 15.10.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Experimental and numerical investigations of rail behaviour under compressive force on ballastless track systems
AU - Kang, Chongjie
AU - Bode, Matthias
AU - Wenner, Marc
AU - Marx, Steffen
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Aiming to verify the behaviour of ballastless track systems under high compressive rail forces occurring in the vicinity of bridge joints due to track bridge interaction, numerical and experimental studies are described in this paper. At first, a short summary of background information on the allowable rail stresses under compressive force on ballasted track systems is presented. Subsequently, a numerical pre-study for ballastless systems is performed. The unfavourable imperfection cases and loading procedures in transverse direction for experimental tests are determined. Based on these results, two rails are experimentally tested to achieve practical results. To ensure safety and reliability of the system, a specific testing program and a measurement concept are developed. Main testing results including the rail geometry, deformation and stress development are compared and discussed. Additionally, numerical models to evaluate the rail behaviour are improved and verified. A good consistency between the finite element model and the testing results could be achieved. The performed investigations give a scientific basis in order to increase the allowable rail compressive stresses in comparison with the existing values in the codes. A higher allowable rail stress considerably improves the design conditions for long railway bridges.
AB - Aiming to verify the behaviour of ballastless track systems under high compressive rail forces occurring in the vicinity of bridge joints due to track bridge interaction, numerical and experimental studies are described in this paper. At first, a short summary of background information on the allowable rail stresses under compressive force on ballasted track systems is presented. Subsequently, a numerical pre-study for ballastless systems is performed. The unfavourable imperfection cases and loading procedures in transverse direction for experimental tests are determined. Based on these results, two rails are experimentally tested to achieve practical results. To ensure safety and reliability of the system, a specific testing program and a measurement concept are developed. Main testing results including the rail geometry, deformation and stress development are compared and discussed. Additionally, numerical models to evaluate the rail behaviour are improved and verified. A good consistency between the finite element model and the testing results could be achieved. The performed investigations give a scientific basis in order to increase the allowable rail compressive stresses in comparison with the existing values in the codes. A higher allowable rail stress considerably improves the design conditions for long railway bridges.
KW - Allowable rail stresses
KW - Ballastless track
KW - Compression
KW - Experiment
KW - Imperfection
KW - Track bridge interaction
UR - http://www.scopus.com/inward/record.url?scp=85069689400&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2019.109413
DO - 10.1016/j.engstruct.2019.109413
M3 - Article
VL - 197
JO - Engineering Structures
JF - Engineering Structures
SN - 0952-5807
M1 - 109413
ER -