Base-Plate INDIA CODE.xls
-
Upload
sunil-singh -
Category
Documents
-
view
374 -
download
42
Transcript of Base-Plate INDIA CODE.xls
-
8/10/2019 Base-Plate INDIA CODE.xls
1/45
1 Design forces
Factored Axial load Pu = KN From analysis
Nature of axial load =
Factored Shear force Fy = KN
Dia of anchor bolts (HT bolts) = M mm
No of bolts = Nos
Grade of bolts =
Ultimate Tensile strength of bolt fu = Mpa
Ultimate Tesile strength of plate fcu = Mpa
Yield stress of plate fy = Mpa
Yield stress of bolt fyb = Mpa
Cube compressive strength of concrete fck = Mpa2 Geometric properties
Column section =
Depth of section = mm
Width of flange = mm
Clearence of holes = mm
Dia of holes = Nominal dia of bolt + clearence = mm
Minimum Edge distance = mm Clause 10.2.4
Maximum edge distance = 12t IS:800:2007
= mm
= (250/fy)1/2
=
Edge distance provided = mm
O.K
50
16
400
140
150
20
50
250
33
22
150
192
150
100
200
2525
450
30
250
ISMB
250
400
100
17
Compression
References
2
140
2
1
150
4
20
8.8
S.No
Design of base plate
Project/Client :-
Calculations
-
8/10/2019 Base-Plate INDIA CODE.xls
2/45
Minimum spacing of bolts (2.5 d) = mm Clause 10.2.2 &
Maximum spacing of bolts (lesser of 32t or 300) = mm 10.2.3
Spacing of bolt provided = mm IS:800:2007
O.K
3 Check for base pressure
Bearing pressure of plate w = Pu/Ap
= Mpa
Allowable bearing pressure = 0.6fck
= Mpa
Safe
4 Check for Minimum Thickness of base plate Clause 7.4.3.1
Thickness of plate required IS:800:2007
ts = mm
Thickness of plate required = mm
Safe
4 Check for shear capacity of bolts Clause 10.3.3
Design shear strength of bolt, Vdsb = Vnsb/mb IS:800:2007
Nominal shear capacity, Vnsb
Vnsb = KN
Vdsb = KN
Calculated shear force per bolt Vd = KN
Safe
5 Check for bearing capacity of bolts Clause 10.3.4
Design bearing strength of bolts Vdpb = Vnpb/mb IS:800:2007
Vnpb = 2.5k bd t fu
kb =
Vnpb = KN
Vdpb = KN
Calculated bearing strength of bolt Vb = KN
Safe
6 Check for tension capacity of bolts
Design tension capacity of bolt Tdp = Tnp/mb
Nominal Tensile capacity of bolt
Tnp = 0.9fubAn
-
8/10/2019 Base-Plate INDIA CODE.xls
3/45
fybAsb(mb/mo) = Mpa
Nominal Tensile capacity of bolt Tnp = Mpa
Design tension capacity of bolt Tdp = Mpa
Calculated tension per bolt T = Mpa
N.G
7 Check for combined shear and tension
N.G
N.G
N.G= N.G
N.G
N.G+
N.G
N.G
N.G
N.G
> 1.0
-
8/10/2019 Base-Plate INDIA CODE.xls
4/45
-
8/10/2019 Base-Plate INDIA CODE.xls
5/45
-
8/10/2019 Base-Plate INDIA CODE.xls
6/45
-
8/10/2019 Base-Plate INDIA CODE.xls
7/45
-
8/10/2019 Base-Plate INDIA CODE.xls
8/45
-
8/10/2019 Base-Plate INDIA CODE.xls
9/45
-
8/10/2019 Base-Plate INDIA CODE.xls
10/45
-
8/10/2019 Base-Plate INDIA CODE.xls
11/45
-
8/10/2019 Base-Plate INDIA CODE.xls
12/45
-
8/10/2019 Base-Plate INDIA CODE.xls
13/45
-
8/10/2019 Base-Plate INDIA CODE.xls
14/45
-
8/10/2019 Base-Plate INDIA CODE.xls
15/45
-
8/10/2019 Base-Plate INDIA CODE.xls
16/45
1 Design forces
Axial load Pu = KN From analysis
Nature of axial load =
Bending moment about xx Mx = KN.m
Bending moment about yy My = KN.m
Lataral force along xx Fx = KN
Lataral force along yy Fy = KN
Dia of anchor bolts (HT bolts) = M mm
No of bolts = Nos
2 Geometric properties
Dia. Of pile = mm
Width of column/pedestal = mm
Depth of column/pedestal = mm
Minimum spacing of piles = mm
Centre to Centre distance of two adjacent pile = mm
ReferencesS.No
Design of base plate
Project/Client :-
Calculations
156
Compression
0
0
0
0
300
750
4
20
450
700
As per IS:2911-
Part-1, clause:5.6750
-
8/10/2019 Base-Plate INDIA CODE.xls
17/45
Edge projection from face of piles
(Min 100-150mm) = mm
Width of pile cap = mm
Length of pile cap = mm
Depth of pile cap ( assumed) = mm
Clear cover to the reinforcement = mm
Grade of concrete fck = Mpa
Grade of Steel fy = Mpa
3 Load calculations
Weight of pile cap = KN
Additional load due to moment = KN
Total load on each pile = KN
=
4 Calculation of reinforcement
a)Bending theoryBending moment about xx = KN.m
Design bending moment = KN.m
Dia of Main reinforcement = mm
Dia of secondary reinforcement = mm
Effective depth of pile cap = mm
Mu/bd2 =
pt = %
pt,min = %
Area of steel required = mm2
b)Truss theory
Tension at bottom = Pu/12ld(3l2-a
2)
= KN
Area of steel required = mm2
Area of steel required
(max of bending & truss theory) = mm2
No of bars required = Nos
No of bars provided = Nos
Area of steel provided = mm2
5 Check for shear
a)One way shear
Percentage of steel provided = %
= 0.87fy/6.89pt
=
Permissible shear stress, c = Mpa Clause 40.50.273
4
452.16
0.145
17.42
97.69
270.57
373.68
4
0.2
0.056
0.12
373.68
12.15
75
20
As per IS:2911-
Part-1,
150
600
1350
519
84.08
O.K
21.44
32.161
600
12
0
12
415
-
8/10/2019 Base-Plate INDIA CODE.xls
18/45
Nominal shear stress ,v = Mpa
Shear span, av(C/C of pile/2-d/2+20% pile dia) = m
Enhancement factor (2d/av) =
Modified shear strength, v = Mpa
1.57>0.41
O K
b)Two way shear
Punching shear, V = KN
Perrimeter of column, = mm
Punching shear stress, = Mpa
Permissible shear stress, = Mpa
1.11803398874989>0.2
O K
1.118
Clause 31.6.3
IS:456-2000
IS:456-2000
1.57
234
2300
0.2
0.41
0.18
5.77
-
8/10/2019 Base-Plate INDIA CODE.xls
19/45
-
8/10/2019 Base-Plate INDIA CODE.xls
20/45
-
8/10/2019 Base-Plate INDIA CODE.xls
21/45
-
8/10/2019 Base-Plate INDIA CODE.xls
22/45
-
8/10/2019 Base-Plate INDIA CODE.xls
23/45
-
8/10/2019 Base-Plate INDIA CODE.xls
24/45
-
8/10/2019 Base-Plate INDIA CODE.xls
25/45
-
8/10/2019 Base-Plate INDIA CODE.xls
26/45
-
8/10/2019 Base-Plate INDIA CODE.xls
27/45
-
8/10/2019 Base-Plate INDIA CODE.xls
28/45
-
8/10/2019 Base-Plate INDIA CODE.xls
29/45
-
8/10/2019 Base-Plate INDIA CODE.xls
30/45
-
8/10/2019 Base-Plate INDIA CODE.xls
31/45
1 Design forces
Factored Axial load Pu = KN From analysis
Nature of axial load =
Factored Shear force Fy = KN
Dia of anchor bolts (HT bolts) = M mm
No of bolts = Nos
Grade of bolts =
Ultimate Tensile strength of bolt fu = Mpa
Ultimate Tesile strength of plate fcu = Mpa
Yield stress of plate fy = Mpa
Yield stress of bolt fyb = Mpa
Cube compressive strength of concrete fck = Mpa2 Geometric properties
Column section =
Depth of section = mm
Width of flange = mm
Clearence of holes = mm
Dia of holes = Nominal dia of bolt + clearence = mm
Minimum Edge distance = mm Clause 10.2.4
Maximum edge distance = 12t IS:800:2007
= mm
= (250/fy)1/2
=
Edge distance provided = mm
Not OK
4
36
8.8
180
144
160
25
100
1
S.No
Design of base plate
Project/Client :-
Calculations
1100
Tension
References
300
12
250
BUILT-UP I SECTION
250
50
500
50
160
300
400
300
2
38
400
250
57
50
160
100
400
100
200
-
8/10/2019 Base-Plate INDIA CODE.xls
32/45
Minimum spacing of bolts (2.5 d) = mm Clause 10.2.2 &
Maximum spacing of bolts (lesser of 32t or 300) = mm 10.2.3
Spacing of bolt provided = mm IS:800:2007
O.K
3 Check for base pressure
Bearing pressure of plate w = Pu/Ap
= Mpa
Allowable bearing pressure = 0.6fck
= Mpa
Safe
4 Check for Minimum Thickness of base plate Clause 7.4.3.1
Thickness of plate required IS:800:2007
ts = mm
Thickness of plate required = mm
Safe
4 Check for shear capacity of bolts Clause 10.3.3
Design shear strength of bolt, Vdsb = Vnsb/mb IS:800:2007
Nominal shear capacity, Vnsb
Vnsb = KN
Vdsb = KN
Calculated shear force per bolt Vd = KN
Safe
5 Check for bearing capacity of bolts Clause 10.3.4
Design bearing strength of bolts Vdpb = Vnpb/mb IS:800:2007
Vnpb = 2.5k bd t fu
kb =
Vnpb = KN
Vdpb = KN
Calculated bearing strength of bolt Vb = KN
Unsafe
6 Check for tension capacity of bolts
Design tension capacity of bolt Tdp = Tnp/mb
Nominal Tensile capacity of bolt
Tnp = 0.9fubAn
-
8/10/2019 Base-Plate INDIA CODE.xls
33/45
fybAsb(mb/mo) = Mpa
Nominal Tensile capacity of bolt Tnp = Mpa
Design tension capacity of bolt Tdp = Mpa
Calculated tension per bolt T = Mpa
Unsafe
7 Check for combined shear and tension
Unsafe
75
34.56+
289.02
73.25
58.6
275
> 1.0275
58.6= 6.863
-
8/10/2019 Base-Plate INDIA CODE.xls
34/45
-
8/10/2019 Base-Plate INDIA CODE.xls
35/45
-
8/10/2019 Base-Plate INDIA CODE.xls
36/45
-
8/10/2019 Base-Plate INDIA CODE.xls
37/45
-
8/10/2019 Base-Plate INDIA CODE.xls
38/45
-
8/10/2019 Base-Plate INDIA CODE.xls
39/45
-
8/10/2019 Base-Plate INDIA CODE.xls
40/45
-
8/10/2019 Base-Plate INDIA CODE.xls
41/45
-
8/10/2019 Base-Plate INDIA CODE.xls
42/45
-
8/10/2019 Base-Plate INDIA CODE.xls
43/45
-
8/10/2019 Base-Plate INDIA CODE.xls
44/45
-
8/10/2019 Base-Plate INDIA CODE.xls
45/45