Geokon 4911, Руководство по установке, Страница: 25 / 27

19
ε
2
=
P
a
2
×
E
Equation 8 - Zone Two Calculation
ε
3
=
P
a
3
×
E
Equation 9 - Zone Three Calculation
Where;
P is the load in pounds or kilograms.
a2 and a3 are the cross-sectional areas in inches2 or cm2. See Table 6.
Ε is the Young's Modulus, 30 × 106 psi or 2.1 × 106 kg/cm2 (or MPa × 10.197)
P is also given by the following equation:
P=∆R
×
F
Equation 10 - Load in Pounds/Kilograms
Where;
P is the applied load in pounds or kilograms.
∆ R is the corresponding change in readout digits.
F is the calibration factor expressed as lbs. or kg. per readout digit.
Rebar Size Diameter a2 a3
#4
0.500 in.
1.27 cm
0.196 in2
1.264 cm2
0.248 in2
1.60 cm2
#5
0.625 in.
1.59 cm
0.3058 in2
1.973 cm2 0.357 in2
2.303 cm2
#6
0.750 in.
1.905 cm
0.390 in2
2.516 cm2
0.442 in2
2.852 cm2
#7
0.875 in.
2.222 cm
0.549 in2
3.542 cm2
0.601 in2
3.877 cm2
#8
1.000 in.
2.54 cm
0.733 in2
4.729 cm2
0.785 in2
5.065 cm2
#9
1.125 in.
2.858 cm
0.942 in2
6.077 cm2
0.994 in2
6.413 cm2
#10
1.250 in.
3.175 cm
1.175 in2
7.580 cm2
1.227 in2
7.916 cm2
#11
1.375 in.
3.493 cm
1.432 in2
9.239 cm2
1.485 in2
9.580 cm2
#12
1.500 in
1.714 in2 1.766 in2
#14
1.750 in
2.352 in2 2.404 in2
Table 6 - Unbonded Section Dimensions