KENTRACK, A PERFORMANCE-BASED LAYERED ELASTIC RAILWAY TRACKBED STRUCTURAL DESIGN AND ANALYSIS PROCEDURE – A TUTORIAL

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KENTRACK, A PERFORMANCE-BASED LAYERED ELASTIC RAILWAY TRACKBED STRUCTURAL DESIGN AND ANALYSIS PROCEDURE – A TUTORIAL

Mensagem por Manuela » 05 Set 2016, 14:00

Autores: Jerry G. Rose, Nithin K. Agarwal, Justin D. Brown e Neeharika Ilavala.

ABSTRACT:
KENTRACK is a layer elastic finite element based computer program that can be utilized for a performance-based structural design and analysis of railway trackbeds. Kentrack was initially developed to analyze traditional all-granular layered trackbeds and asphalt layered trackbeds. The versatility was recently expanded to analyze trackbeds containing a combination of granular and asphalt layers. The principle factor in the analysis is to limit vertical compressive stresses on the subgrade. In addition, it is possible to consider the fatigue lives of the various layers relative to the effects of wheel loads, tonnages, environmental conditions and other factors.
The service lives of the individual components of the trackbed are predicted by damage analysis for various combinations of traffic, tonnages, subgrade support, component layer properties and thicknesses. The latest version, KENTRACK 3.0, is coded in C#.NET, a popular computer language for achieving accuracy and efficiency. The graphical user interface in the KENTRACK 3.0 provides a technique to analyze trackbeds as structures.
It is possible with KENTRACK 3.0 to select trackbed layers and associated thicknesses to satisfy roadbed and trackbed performance requirements. In addition, it is possible to performance-rank different track sectional designs based on the relative importance of the particular track section and track type. The types of roadbed and trackbed configurations are selected to meet each of the various performance ranks. The various steps involved in the calculations are highlighted during the tutorial phase of a sample design calculations and analysis.
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