Lifting 2
April 6, 2023 | Author: Anonymous | Category: N/A
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Description
CALCULATION OF LIFTING BUCKET CONCRETE
Generals Data: Max vertical force, Fz
=
2870 kg
=
6326 lbs
Max horizontal force, F x = 0.05 Fz
=
143 kg
=
316 lbs
Max lateral force, F y = 0.05 Fz
=
143 kg
=
316 lbs
300 125 0 250
mm
=
11.81 in
mm
=
4.92 in
mm
=
0.00 in
mm
=
9.84 in
mm mm
= =
6.89 in 2.25 in
mm
=
3.94 in
mm
=
3.25 in
mm
=
0.59 in
mm
=
0.00 in
Fsl
FX
R
α HT
X
HH
FZ
DH
Z WL
Lug Dimensions: Total Height of lift lug, H T
=
Height of hole centreline, H H
=
Height of slot in, H w
=
Width of lug, W L
=
Radius of lug, R Diameter of shackle 2" pin, 2" pin, DP
= =
Diameter of hole, D H
=
Width of shackle 2" jaws, 2" jaws, W J
=
Thickness of lug, tL
=
Thickness of cheek, tC Check space of hole and pin Check space of jaws and lug thickness
= = =
Material, Stress and Properties Data: Lug material
=
Allowable stress, Fy
=
Allowable tension stress, 0.6 Fy
=
Allowable shear stress, 0.4 Fy DH/2R
=
Stress-Concentration factor (near hole), K
=
175 57 100 83 15 0
Clear
Ratio
Clear
Ratio
= =
57.15%
18.17%
JIS G3101 - SS400 4,079 kg/cm = = 2,447 kg/cm 1,632 kg/cm = 0.29 2.45
=
58,015 psi 34,809 psi 23,206 psi
(for flat plate with centrally located circular hole in tension based on D H/2R value) 9.38 cm3 156.25 cm3
Section modulus of lugs, S Lz
=
Section modulus of lugs, S Ly
=
Stresses at Lug: Tension stress, Stz = Fx /(W L tL)+HH(Fz/SLy+F y/SLz)
=
Shear stress z-axis, Ssz = Fz / (W L tL)
=
425 kg/cm 77 kg/cm
Shear stress y-axis, Ssy = Fy / (W L tL)
=
4 kg/cm
432 kg/cm
0.57 in3 9.53 in3
= =
4
Total stress Check tension stress Check shear stress z-axis (longitudinal)
= = =
Safe
Ratio
Safe
Check shear stress y-axis (tranversal) Check total stress
= =
Safe Safe
=
6,041 psi
=
1,088 psi
=
54 psi
Ratio
= = =
6,138 psi
4.69%
Ratio Ratio
= =
0.23% 17.63%
17.35%
Stresses near the hole: Tension stress, Stx = K Fx / [(W L - DH) tL]
=
Tension stress, Stz = K Fz / [(HH + R - D H) tL]
=
16 kg/cm 234 kg/cm
Shear stress, Ssy = K Fy / [(W L - DH) tL]
=
16 kg/cm
Total stress Check tension stress x-axis Check tension stress z-axis Check shear stress y-axis (tranversal)
= = = =
Check total stress
=
235 kg/cm
4
=
222 psi
=
3,333 psi
=
222 psi
3,348 psi
0.64%
9.58%
0.96%
9.62%
Safe
Ratio
Safe
Ratio
Safe
Ratio
= = = =
Safe
Ratio
=
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