Environmental Engineering Reference
In-Depth Information
Table 11. Continued
*
Mounting
Technique
Height, m
Acceleration Amplitude m /sec 2 , at Frequency, Hz
0,5
1
2
3
4
5
6
10
15
30
VII
On building
constructions
From 0 to 5 inclusive
0,5
0,6
0,6
0,6
0,6
0,6
0,6
0,5
0,3
Over 5 to 10 inclusive
1,0
1,2
1,2
1,2
1,2
1,2
1,2
1,0
0,5
Over 10 to 25 inclusive
2,0
2,4
2,4
2,4
2,4
2,4
2,4
2,0
1,0
Over 25 to 35 inclusive
0,2
2,4
3,0
3,0
3,0
3,0
3,0
3,0
2,4
1,2
Over 35 to 70 inclusive
0,3
3,2
4,0
4,0
4,0
4,0
4,0
4,0
3,2
1,6
On intermediate
constructions or
technological
equipment
From 0 to 5 inclusive
1,0
1,2
1,2
1,2
1,2
1,2
1,2
1,0
0,5
Over 5 to 10 inclusive
2,0
2,4
2,4
2,4
2,4
2,4
2,4
2,0
1,0
Over 10 to 25 inclusive
0,3
4,0
4,8
4,8
4,8
4,8
4,8
4,8
4,0
2,0
Over 25 to 35 inclusive
0,4
4,8
6,0
6,0
6,0
6,0
6,0
6,0
4,8
2,4
Over 35 to 70 inclusive
0,5
6,4
8,0
8,0
8,0
8,0
8,0
8,0
6,4
3,2
VIII
On building
constructions
From 0 to 5 inclusive
1,0
1,2
1,2
1,2
1,2
1,2
1,2
1,0
0,5
Over 5 to 10 inclusive
2,0
2,4
2,4
2,4
2,4
2,4
2,4
2,0
1,0
Over 10 to 25 inclusive
0,3
4,0
4,8
4,8
4,8
4,8
4,8
4,8
4,0
2,0
Over 25 to 35 inclusive
0,4
4,8
6,0
6,0
6,0
6,0
6,0
6,0
4,8
2,4
Over 35 to 70 inclusive
0,5
6,4
8,0
8,0
8,0
8,0
8,0
8,0
6,4
3,2
On intermediate
constructions or
technological
equipment
From 0 to 5 inclusive
2,0
2,4
2,4
2,4
2,4
2,4
2,4
2,0
1,0
Over 5 to 10 inclusive
0,3
4,0
4,8
4,8
4,8
4,8
4,8
4,8
4,0
2,0
Over 10 to 25 inclusive
0,6
8,0
9,6
9,6
9,6
9,6
9,6
9,6
8,0
4,0
Over 25 to 35 inclusive
0,8
9,6
12,0
12,0
12,0
12,0
12,0
12,0
9,6
4,8
Over 35 to 70 inclusive
1,0
12,8
16,0
16,0
16,0
16,0
16,0
16,0
12,8
6,4
* Earthquake intensity in points
influence for this test equipment, a simultaneous
influence along two (one of horizontal and verti-
cal) directions is executed, at this time acceleration
amplitudes in a horizontal direction are increased
in 1,4 times comparing to the specified one in
Table 13. Acceleration amplitude at every fre-
quency is suggested to choose 15% over the
specified in Table 13 to guarantee coverage of the
required response spectrum of test values. Hold
time at each frequency - not less than 10 sec.
During and / after test influences, correspond-
ing to maximum credible earthquake, also those
EIF are simulated, which can occur in emergency
situations or accidents, caused by such an earth-
quake and have a negative impact on device earth-
quake resistance. For consideration of possible
factors of mechanical aging, devices of category
I earthquake resistance before resistance tests for
maximum credible earthquake are put under test
influences not less than 5 times, which simulate
a design basis earthquake.
Devices of category I and II earthquake re-
sistance should not have primary frequencies of
own vibrations (resonant frequencies) in a range
from 0,5 to 30 Hz. The devices, their racks and
mounts, provided by documentation, should be
resistant to overthrow under static force, applied
to the center of mass, and equal to the product of
maximal acceleration with the device mass.
 
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