Post on 11-Feb-2016
description
DESIGN CALCULATION FOR ANCHOR BOLTS
GIVEN DATA :
A FOR GRC PANEL 6
1 GRC Unit Weight = 2000 Kg/M³
2 GRC Panel Screen Dimension
a) Height = 2400 mm
Width = 1535 mm
Thickness = 25 mm
3 GRC Volume = L x W x Thk
2400 x 1535 x 25
GRC Volume = Vol= 92100000 mm³
or Vol = 0.0921 m³
4 GRC Weight = WT.= GRC Unit Weight x Volume
WT. = 2000 x 0.0921
184.20 Kg x 9.81
1807.002 N
say WT. = 1850 N
5 GRC Border Size
0.04 m
Length 2.4 m
Width 0.085 m
16.32 Kg
Total no borders 4
65.28 Kg
Thickness
Weight og GRC Border
Total Weight 65.28 Kg
652.8 N
Total Weight
B FOR STEEL
1 Yield Stress Fy = 275 MPa or N/mm² Ga = 40
40000 psi ( galvanized)
2 Unit Weight = 7850 Kg/M³
3 Allowable Stresses
Shear Stress ( Fv ) 0.4Fy
Bending ( Fb) 0.66Fy since Fy < 65000 psi
Deflection ( def ) L for none structural member
240
4 E (Modulus Of Elasticity) = 200000 MPa or N/mm²
C ANALYSIS OF BOLTS
LOADS CONSIDERED:
Dead Load 2502.8 N
WIND LOAD
Building Dimension
H = 12 m Height of the structure
D = 29 m Greater horizontal dimension
W = 23 m Lesser horizontal dimension
Standard Wind Speed
Vb = 45 m/s
Z = 12 m Max. Height of the structure
I = 1.15 Building Importance - see table 6-1 page 73I = 1.15 Building Importance - see table 6-1 page 73
α = 11.50
Zg = 12 Max. Height of GRC arch to install
Kzt = 1.0 topographic effects of 6.5.7 (Flat) see also
Figure 6.4, page 47
Kd = 0.85 Directional factor see table 6.4 page 76
Kz = 1.38 Velocity Pressure Coefficient
qh = (0.613.Kz.Kzt.Kd.Vb².I)
qh = 1.67 KN/m² Eqn 6-15, page 31
Wind load on the panel 6.159863766 KN
6159.863766 N
8662.663766 N
These load is sharing by 8 no. M8 bolts.
1082.832971 N
HENSE SAFE4300 N
Total Load
Load on each bolt
Shear Carrying capacity of M8 Bolt
D CONCLUSION
So, provide M8 Bolts at all Connection Points
as shown in Diagram
For all other GRC screens this is the big panel.so, provide 8M GRADED BOLTS for all panels
( galvanized)
For all other GRC screens this is the big panel.so, provide 8M GRADED BOLTS for all panels