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Background investigation on the permissible additional rail stresses due to track/bridge interaction
Highlights The value 72 MPa (compressive) is based on a stability calculation. The stability analysis is not proper for ballast-less track systems. The value 92 MPa (tensile) depends on the rail fatigue resistance. The 72 MPa/92 MPa limits have a huge restricting influence on the design of longer railway bridges.
Abstract The permissible additional rail stresses are essential when verifying the track/bridge interaction. Firstly, the current verification values of the German codes and other international codes (Eurocode, UIC, Spain, Italy and China) are introduced in this work. Subsequently, a detailed explanation of track/bridge interaction including the decisive historical investigations, rail stresses and permissible additional stresses is given. Afterwards, the background and related recent investigations on the limitation of additional permissible rail compressive stress (92 MPa/72 MPa) and tensile stress (92 MPa) due to track/bridge interaction in Eurocodes and German codes are comprehensively explained. It can be concluded that these permissible additional stress limitations are no longer dependable with the rapid development of high-speed railway and rail manufacturing technologies. New investigations are necessary to be carried out.
Background investigation on the permissible additional rail stresses due to track/bridge interaction
Highlights The value 72 MPa (compressive) is based on a stability calculation. The stability analysis is not proper for ballast-less track systems. The value 92 MPa (tensile) depends on the rail fatigue resistance. The 72 MPa/92 MPa limits have a huge restricting influence on the design of longer railway bridges.
Abstract The permissible additional rail stresses are essential when verifying the track/bridge interaction. Firstly, the current verification values of the German codes and other international codes (Eurocode, UIC, Spain, Italy and China) are introduced in this work. Subsequently, a detailed explanation of track/bridge interaction including the decisive historical investigations, rail stresses and permissible additional stresses is given. Afterwards, the background and related recent investigations on the limitation of additional permissible rail compressive stress (92 MPa/72 MPa) and tensile stress (92 MPa) due to track/bridge interaction in Eurocodes and German codes are comprehensively explained. It can be concluded that these permissible additional stress limitations are no longer dependable with the rapid development of high-speed railway and rail manufacturing technologies. New investigations are necessary to be carried out.
Background investigation on the permissible additional rail stresses due to track/bridge interaction
Kang, Chongjie (author) / Wenner, Marc (author) / Marx, Steffen (author)
Engineering Structures ; 228
2020-10-28
Article (Journal)
Electronic Resource
English
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