|
|
The first image in this figure shows a computer-generated illustration of a post. The post is colored blue. No damage to the post is shown in this first image.
The second image shows a computer-generated illustration of a post. A gap has formed at the mid-point of the structure. Fringe levels are indicated at the back of the gap in red and running up the side of the gap slightly in light blue and green.
The third image in this figure shows a computer-generated illustration. The gap has deepened. Leaving a strain of post in the middle to stretch from one half to the other, the fringe levels on this piece colored red. The fringe levels on either side of the gap have turned from light blue and green to red and dark green.
FHWA-HRT-05-096
