Figure 23. Calculations with Q subscript C greater than Q subscript T soften more rapidly than calculations with Q subscript C equals Q subscript T. Graphs A and B.

Both graphs show three distinct lines. The first is a solid green line with green dots and is labeled Q subscript T equals 0.60 Q subscript C equals 0.60. The second line is solid red and is labeled Q subscript T equals 0.47 Q subscript C equals 0.63. Finally, the third line is blue dashed and is labeled Grade 1 Test 418.

1. The vertical axis of this graph ranges from 0 to 60 and represents Force (kilonewtons) while the horizontal axis of this graph ranges from 0 to 200 and represents Deflection (millimeters). All three lines start at the points of zero on the vertical and horizontal axes. Both the red and green lines run on top of one another as they curve upward and peak at the points of 49 on the vertical axis and 50 on the horizontal axis. From there the green line stretches out beyond the red line to the points of 49 on the vertical axis and 70 on the horizontal axis where it drops off to the points of 40 vertical and 75 horizontal. The green line then curves downward gradually to the points of 19 on the vertical axis and 115 on the horizontal axis where it spikes back up in the slightest to the points of 23 vertical and 125 horizontal. From this point the green line gradually climbs linear off of the graph at the points of 25 vertical and 200 horizontal. The red line falls off sooner than the green at the points of 49 on the vertical axis and 65 on the horizontal axis where it continues to drop off steeply to the points of 12 on the vertical axis and 100 on the horizontal axis. From there the red line plateaus for some time before dropping off again at the points of 12 on the vertical axis and 145 on the horizontal axis where it slopes off of the graph at the points of 5 on the vertical axis and 200 on the horizontal axis. The blue dashed line rises in a gradually curve from the points of zero on both axes and peaks at the points of 46 on the vertical axis and 50 on the horizontal axis. The line then plateaus jaggedly until it begins to gradually drop off from the points of 46 on the vertical axis and 65 on the horizontal axis. From the points of 35 on the vertical axis and 85 on the horizontal axis the dashed blue line plummets severely, straight down to the points of 6 on the vertical axis and 90 on the horizontal axis. From there the blue line jolts back up to the points of 14 on the vertical axis and 115 on the horizontal axis where the line descends diagonally off the graph at the points of 6 on the vertical axis and 200 on the horizontal axis.

2. The vertical axis of this graph ranges from 0 to 7,000 and represents Force (kilonewtons) while the horizontal axis of this graph ranges from 0 to 200 and represents Deflection (millimeters). Both the red and green lines run one on top of the other as they ascend from the zero points on both the vertical and horizontal axes. At the points of 3,300 on the vertical axis and 75 on the horizontal axis the two lines split as the green line continues to ascend at a steeper rate until it leaves the graph at the points of 6,000 on the vertical axis and 200 on the horizontal axis while the red line gradually climbs off of the graph at the points of 4,200 on the vertical axis and 200 on the horizontal axis. The blue line begins at the points of zero on both the vertical and horizontal axes and mirrors the red and green lines as it climbs to its peak just beneath the other two lines. The blue line reaches a distinct peak at the points of 3,200 on the vertical axis and 85 on the horizontal axis where it continues a diagonal climb off the graph at the points of 3,900 on the vertical axis and 200 on the horizontal axis.

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FHWA-HRT-05-096