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Water heat exchange unit
Distance from center of gravity to bolt
S hort direction(l
L ong direction(l
Bolt span
S hort direction(l
L ong direction(l
Actual strength of the foundation bolts
S hort term allowable tensile stress(f
S hort term allowable shear stress (f
Pull out load on one bolt
Shor t direction(R
Long direction(R
Foundation bolt shear stress(
Foundation bolt tensile stress
11
Shor t direction(
Long direction(
Allowable tensile stress in a bolt subject to simultaneous tensile and shear stress(f
12
3
Judgment
Tensile load
S hort direction if R
L ong direction if R
Shear stress
τ
if
Tensile stress
s hort direction if
L ong direction if
)
G1
)
G2
)
1
)
2
)
b1
)
b2
τ
)
δ
)
1
δ
)
2
<T
OK
a
b1
<T
OK
a
b2
< f
OK
s
δ
< f
1
t
OK
δ
< f
1
ts
δ
< f
2
t
OK
δ
< f
2
ts
8. Position of center of gravity and earthquake resistance calculation
l
=
mm
G1
l
=
mm
G2
l
=
mm
1
l
=
mm
2
2
)
f
= 176
N/mm
... for SS400 f
t
t
2
)
f
=
99
N/mm
... for SS400 f
s
s
F
H
R
=
b 1
F
H
R
=
b 2
F
τ
H
=
=
N A
R
b 1
δ
=
=
1
A
R
δ
b 2
=
=
2
A
τ
f
=1.4 f
-1.6 = 231.4 N/mm
t s
t
R
=
b1
R
=
b2
τ
=
< f
δ
=
1
δ
=
2
H - 25
:176
t
: 132×0.75
S6
)
h
–(W - F
l
G
V
G1
=
l
n
1
1
h
)
- ( W-F
l
G
V
G2
=
l
n
2
2
2
N/mm
2
N/mm
2
N/mm
)
ts
2
< T
=
4 ,508
a
< T
=
4 ,508
a
=
99
s
< f
=
176
t
< f
= 231.4
ts
< f
=
176
t
< f
= 231.4
ts
N
N
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