Criteria for Restoration of Longitudinal Barriers (2010) / Chapter Skim
Currently Skimming:
Pages 61-65
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 61... ...
The procedure by which the post and rail separation was induced in the finite element model is described in the appendices. The resulting model is shown in Figure 52 for 3 inches of deflection of two adjacent posts.
|
From page 62... ...
The most severe damage condition modeled, which was two posts separated by 3 inches, resulted in a 5.6 percent increase in maximum dynamic deflection. The increases associated with rail and post separation were smaller than those of the missing post, rail and post deflection, and rail flattening damage conditions.
|
From page 63... ...
63 -50 -30 -10 10 30 50 70 90 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Time (s)
|
From page 64... ...
D is ta nc e fro m G ua rd ra il (m m) Static Deflection Contour Max Deflection Contour (t=0.165s)
|
From page 65... ...
In the recommendation in Exhibit 9.0, the research team recommends that the damage should also be evaluated using the deflected post and rail guidelines. Similarly, if the blockout is damaged or missing, maintenance personnel should use the damaged blockout repair guidelines.
|
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.