RTRI REPORT Jun. 2007
PAPERS

Effects of Non-Uniformity of Subgrade Stiffness on the Deformation Characteristics of Concrete Roadbed

Takahisa NAKAMURA,  Yoshitsugu MOMOYA,
Takatada TAKAHASHI,  Etsuo SEKINE


  In order to investigate the effects of non-uniformity of subgrade stiffness on the deformation characteristics of concrete roadbeds for the slab track on the earth structure, three dimensional FEM was carried out. The results showed that on the non-uniform subgrade, the stresses and the displacements of concrete roadbeds were larger than those on the uniform subgrade. It was also shown that the stresses of steel reinforcing bars in the concrete roadbeds were smaller enough than fatigue strengths even on the non-uniform subgrade. It was confirmed that the concrete roadbeds have enough fatigue strength even on non-uniform subgrades.


* Full papers of RTRI Report are written in Japanese.

Copyright (c) 2007 Railway Technical Research Institute