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for which the measured LTE were 21%, 100%, and 6%. The center plot shows a close-up of the
deflections measured over these joints. Joints 29 and 33 have a pattern very similar to the pattern
shown in the front sensor plot in Figure 4.4, with a significant drop in deflection, whereas joint
32 has a very symmetric deflection pattern with very little change as it rolls over the joint. The
deflection patterns for the front sensor are also shown in Figure 4.6, where several of the joints
tested with the FWD are also marked. There is evidence of the relationship between shape of the
deflection pattern and measured LTE. The joints with close to 100% LTE have very symmetric
deflections whereas those with poor LTE have a distorted pattern, where the deflections drop and
then rise again as the load moves to the second slab.
Figure 4.5: Deflection Patterns Collected with the Front Sensor
Figure 4.6: Blow Up of the Front Sensor Deflections with Several of the Joints Tested with the
FWD
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