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Water Heat Exchanger Unit
8) Actual strength of anchor bolts
Short-term allowable tensile stress (f
Short-term allowable shear stress (f
9) Pull-out load on one bolt
End-on direction (R
Broadside direction (R
10) Anchor bolt shear stress ( )
11) Mounting bolt tensile stress
End-on direction (δ
Broadside direction (δ
12) Allowable tensile stress on a bolt subject to both tensile and shear stresses (f
(3) Judgment
1) Tensile load
End-on direction, if R
Broadside direction, if R
2) Shear stress
ifτ< f
,
s
3) Tensile stress
End-on direction:
Broadside direction: if δ
GHP Chiller TECHNICAL DATA.indb A-33
GHP Chiller TECHNICAL DATA.indb A-33
)
f
t
)
f
s
)
R
b1
)
R
b2
δ
)
1
δ
)
2
f
< T
R
OK
b1
a
< T
OK
R
b2
a
OK
if δ
< f
1
t
δ
OK
δ
<f
1
ts
< f
2
t
δ
OK
δ
<f
2
ts
A-33
8. Center of gravity and
earthquake resistance
= 176 N/mm
2
for SS400, f
t
= 99 N/mm
2
for SS400, f
s
= F
· h
– (W – F
) L
H
G
V
G1
=
b1
L
· n
1
1
= F
· h
– (W – F
) L
H
G
V
G2
=
b2
L
· n
2
2
F
τ =
H
2
= 3.2 N/mm
N · A
= R
b1
2
= 0.9 N/mm
1
A
= R
b2
= 7.2 N/mm
2
2
A
=1.4 · f
– 1.6τ = 241.2 N/mm
ts
t
=
< T
= 11,760
99
b1
a
=
812
< T
= 11,760
b2
a
τ = 3.2 < f
= 99
s
< f
= 176.0
t
= 0.9
1
< f
= 241.2
ts
< f
= 176.0
t
= 7.2
2
< f
= 241.2
ts
= 176
t
= 132 × 0.75
s
99
N
812
N
)
ts
2
2012/04/06 13:42:07
2012/04/06 13:42:07
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