The Calculation of The Concentrated Dynamic Charge Concerning The Floors of The Special Vehicles

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1. The probation of the floor
The purpose of this trial is to prove the capacity of the floor to sustain a concentrated dynamic charge, which appears during the loading and unloading operations with manipulation trolleys, auto-tip-ups, forklift trucks, etc.
The probation has been effectuated with the help of a trolley provided with tire wheels, with a charge of 4400 kg on the axle, the floor of the container must not have deformations bigger than 2 mm or deteriorations which would make it improper in exploitation. 
The measurements have been developed in three phases:
1. The metal ruler has been put on the floor and with the slide rule it has been measured the distance between the ruler and the floor.
The measurements have been effectuated in the points indicated in figure 1, their results being registered in table 1.
2. The metal box has been loaded with 600 kg weights and it has been put on the floor in the points from figure 1.
3. It has been measured again the distance between the ruler and the floor with the slide rule , in the points from figure 1.
Measuring points 1 2 3 4 5 6 7 8 9
Before load ( mm) 28 43 44,5 26,5 44,5 44,5 26,5 42,5 44,5
After load 
( mm) 29 44,5 44,5 27 46,5 44,5 28,5 43,5 45,5
The deformation 1 1,5 1 0,5 2 1 2 1 1
Table 1
Figure 1. The loading measuring points of the floor 
In the GEOSTAR module was applied the same charge on the floor, verifying in the same measuring points the deformations.
The appliance of the force in point 1:
Figure 2. The application of the force in point 1
The displacement in point 1 is 0.05 mm.
Figure 3. The deformations around point 1
We proceeded the same with the other measuring points resulting the displacements
Measuring points 1 2 3 4 5 6 7 8 9
The deformation (mm) 
2. The probation on the roof
It has been measured the deformations produced by the pressure of the box over the container’s roof. 
The measurements have been effectuated in the points shown in figure 4, the results being registered in table 3 and it has been developed in the following way:
- The metal ruler has been put on the floor and with the slide rule it has been measured the distance between the ruler and the floor.


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