SHRP-A-379 traducir

11.3.1 Peak Stress (kPa) per load cycle:
where
V__n = Peak load applied by the vertical actuator over a load cycle, in N
i --- Number of conditioning cycles applied (i.e., 0, 1...4)
n = Number of load cycles applied (i.e., 1, 2, 3, 4, 5)
11.3.2 Recoverable Axial Strain (mm/mm) per load cycle:
_ri-n
_'i-n =
2h (4)
where
_ri-n = Peak recoverable vertical deformation over a load cycle, in mm
h = Gauge length, the distance over which deformations are measured (i.e,
distance between yoke rings), in mm
NOTE 12.--The recoverable deformation is the position of the total deformation that disappears (or is
recovered) upon unloading the specimen as shown in figure 7.
11.3.3 ECS Modulus (kPa) per load cycle:
MR,_" : cri-n1 (5)
11.4 After calculating ECS modulus for the last five load cycles, calculate the
following:
where
11.4.1 Average ECS Modulus (kPa) per conditioning cycle:
5
E (u,,_n)
Mm - n=l
An (6)
An = the number of load cycle included in M_ calculation (for last five load
cycles, An = 5)
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