n = 18x200 e » 1,50 m

n = 15x240 e = 1,50 m n » 8x240 + 7x240 e = 7x1,5+12+6x1.5

(5) For local verifications, loads from each axle-line are assumed to be distributed as follows:

- For axle-lines of 150 and 200 kN, on two rectangular surfaces of sides 1,20m x 0,15 m arranged as shown in Figure A.1 -a)

- For axle-lines of 240 kN, on three rectangular surfaces of sides 1,20m x 0,15m arranged as shown in Figure A.1-b)

Camageway direction

1,20 m a) 130 and 200 kN axle-lines

0,30m

Figure A.1 : Arrangement of axle-lines

Fatigue life assessment - assessment method based on recorded traffic

(1) A stress history is obtained by analysis using data recorded under representative real traffic provided or agreed by the client, multiplied by a dynamic amplification factor <pfat. This dynamic factor should take into account the dynamic behaviour of the bridge and depends on the expected roughness of the road surface and on any dynamic amplification already included in the records. The recorded axle loads should be multiplied by : (pfat= 1,2 for surface of good roughness

<Pfat= 1,4 for surface of medium roughness.

In addition, when considering a section within a distance of 6,00 m from an expansion joint, the load should be multiplied by the additional dynamic amplification factor A(pfat derived from Figure 4.9, but not exceeding the value

Note : The classification of roadway roughnesses may be taken in accordance with a proposal from ISO/TC 108. The definition of roughness is given in terms of the power spectral density <I> of the roughness profile as a function of the cyclic frequency of path £2. The limit values of the different classes are given in Table B. 1.

Note : The classification of roadway roughnesses may be taken in accordance with a proposal from ISO/TC 108. The definition of roughness is given in terms of the power spectral density <I> of the roughness profile as a function of the cyclic frequency of path £2. The limit values of the different classes are given in Table B. 1.

Quality of pavement 4>(Q0) [cm3] for Q0 = |
. 1 [m-1] | ||

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