United States Department of Transportation
i
Prototype next generation frog foundation - preliminary evaluation : research results.
-
2016-06-01
[PDF-441.87 KB]
Details:
-
Corporate Creators:
-
Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Conventional wisdom suggests that a solid or rigid one-piece frog is preferred because it is easy to maintain. However, testing and subsequent modeling demonstrated that a flexible frog (i.e., a two-piece frog split in the flangeway) produced significantly lower maximum vertical forces with the same heavy axle load traffic. In this phase of the project, the team developed, built, and tested a prototype frog and foundation. The following tasks were performed during this phase: (1) Identified existing frog designs that might be modified to produce the desired characteristics of a more flexible frog; (2) Constructed a prototype that would allow evaluation of various foundation materials and the flexible frog concept; and (3) Provided a preliminary evaluation of the prototype under 315-kip Gross Rail Load (GRL) railcar traffic. The following measurements were made in the field: track stiffness, track settlement, flangeway gap widths, wheel/rail dynamic loads, and identification and count of broken components.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
