B-107
EAR
THQUAKE-PROOF
STRENGTH
ANAL
YSIS
OUTDOOR UNIT
S series
OUTDOOR UNIT
0.160 m
Earthquake-proof strength analysis <Anchor bolt>
1.Type:
2.Model name:
SUZ-KA25VA
3.Specification
(1) Unit mass
W=
30
kg
(2) Anchor bolt
4
=
N
1.The total number of bolts.
e
p
y
t
0
1
M
=
"
2.The size and shape.
8
7
=
A
3.The axis section area per one bolt.
mm
2
=
78×10
-6
m
2
4.The total number of bolts in one side which be pulled stronger when the unit inverted.
Nt=
2
(3) The height between the installing surface and the center of gravity of the unit
Hg=
240
mm= 0.240 m
m
5
2
3
.
0
=
m
m
5
2
3
=
L
(4) The bolt-span from the examination angle
(5) The distance between the center of bolt and the center of gravity of the unit
Lg=
160
mm (Lg L/2)=
4.The examination calculation (by rounding off to the first decimal place of each item)
0
.
1
=
h
K
(1) The horizontal seismic coeffcient for designing
5
.
0
=
2
/
h
K
=
v
K
(2) The vertical seismic coefficient for designing
h
K
=
h
F
(3) The horizontal earthquake forces for designing
W 9.8=
294.0 N
v
K
=
v
F
(4) The vertical earthquake forces for designing
W 9.8=
147.0 N
(5) The withdrawal strength of the anchor bolt
72.4
N
N
73.5
=
N
/
h
F
=
Q
(6) The shear forces of the anchor bolt
(7) The stress arising to the anchor bolt
1.The tensile stress.
=Rb/A=
0.9 MPa ft = 176.4 MPa
2.The shearing stress.
=Q/A=
0.9 MPa fs = 132.3 MPa
3.The stress when affected by both the shearing and the tensile at the same time. fts=1.4ft-1.6 =
245.5
MPa
=
0.9 MPa
fts=
245.5
MPa
(8) The construction way of the anchor bolt
r
o
h
c
n
a
e
p
y
t
J
d
e
x
o
B
=
.t
l
o
b
r
o
h
c
n
a
e
h
t
f
o
y
a
w
n
o
it
c
u
rt
s
n
o
c
e
h
T
.
1
m
0
2
1
.
0
=
m
m
0
2
1
=
.
e
t
e
r
c
n
o
c
e
h
t
f
o
s
s
e
n
k
c
i
h
t
e
h
T
.
2
m
0
7
0
.
0
=
m
m
0
7
=
.t
l
o
b
f
o
tr
a
p
d
e
ir
u
b
f
o
h
t
g
n
e
l
e
h
T
.
3
N
6
3
1
3
=
a
T
.t
h
g
i
e
w
l
a
w
a
r
d
h
ti
w
e
l
b
i
s
s
i
m
r
e
p
e
h
T
.
4
Rb=
72 N
Since the results from the examination above, the anchor bolt has enough strength
S Series Inverter Outdoor unit
Rb=
Fh Hg-(W 9.8-Fv) Lg
L Nt
800
550
240
285
325
500
160
520
G
G
B.3.8 EARTHQUAKE-PROOF STRENGTH ANALYSIS
