1. |
A |
= |
Plan area of footing base in 'sqmm' |
2. |
Ast Prv |
= |
Area of tensile reinforcement provided in 'sqmm' |
3. |
Ast Rqd |
= |
Area of longitudinal reinforcement from bearing moment and minimum % steel provided by user and as per code in 'sqmm' |
4. |
Asv |
= |
Area of shear reinforcement required in 'sqmm/m' |
5. |
AsvPrv |
= |
Area of shear reinforcement provided in 'sqmm/m' |
6. |
A1 |
= |
Bearing area of footing at slope of 1:2 in 'sqmm' |
7. |
A2 |
= |
C/s Area of column in 'sqmm' |
8. |
ax |
= |
Length of Edge of Punching Perimeter parallel to Dc (Column Depth) |
9. |
ay |
= |
Length of Edge of Punching Perimeter parallel to Bc (Column Width) |
10. |
B |
= |
Width of footing base in 'mm' |
11. |
Beff |
= |
Effective width of footing in 'mm' |
12. |
Boff |
= |
Footing offset along B in 'mm' |
13. |
BoffB |
= |
Footing offset along B below column in plan in 'mm' |
14. |
BoffT |
= |
Footing offset along B above column in plan in 'mm' |
15. |
Bv |
= |
Effective width for One-way Shear Design in 'mm' |
16. |
B1 |
= |
Width of sloped footing at top in 'mm' |
17. |
c |
= |
Maximum crack spacing in 'mm' |
18. |
ColOff |
= |
Column offset in sloped footing in 'mm' |
19. |
D |
= |
Depth of footing in 'mm' |
20. |
Deff |
= |
Effective Depth of footing in 'mm' |
21. |
Df |
= |
Depth of founding layer in 'm' |
22. |
Do |
= |
Distance from Extreme Compressive fibre to Centroid of Tensile Force in 'mm' |
23. |
Dv |
= |
Effective depth for shear design in 'mm' |
24. |
dom |
= |
Average Effective Depth of footing for Punching Shear Check in 'mm' |
25. |
Dn |
= |
Depth to Neutral Axis in 'mm' |
26. |
Dw |
= |
Ground water level in 'm' |
27. |
Ec |
= |
Modulus of elasticity of concrete due to creep in 'N/sqmm' |
28. |
Es |
= |
Modulus of elasticity of steel in 'N/sqmm' |
29. |
f'c |
= |
Characteristic Cylinder strength of concrete in 'N/sqmm' |
30. |
f'ctf |
= |
Characteristic Flexural Tensile strength of concrete in 'N/sqmm' |
31. |
fcv |
= |
Concrete Shear Strength in 'N/sqmm' |
32. |
Fd.ef |
= |
Effective Design Service Load per Unit Area in 'N/sqmm' |
33. |
Foss |
= |
Safety factor against sliding |
34. |
Fosu |
= |
Safety factor against uplift |
35. |
Fst |
= |
Stress in steel in 'N/sqmm' |
36. |
Fsy |
= |
Yield Stress of Steel in 'N/sqmm' |
37. |
k1 |
= |
Coefficient that accounts for bond properties of the bonded reinforcement |
38. |
k2 |
= |
Coefficient used for the creep calculation |
39. |
k2 |
= |
Coefficient that accounts for the longitudinal strain distribution |
40. |
k3 |
= |
Coefficient depend on the age of concrete at loadings used for the creep |
41. |
k4 |
= |
Coefficient depend on the enviromental condition used for the creep calculation |
42. |
k5 |
= |
A modification factor for high strength concrete used for creep calculation |
43. |
k6 |
= |
Coefficient accounts for the non-linear creep that develops at sustained stress level of 0.45 fcmi |
44. |
Kcs |
= |
Factors Used in Serviceability Design to Take Account of the Long-Term Effects of Creep and Shrinkage. |
45. |
kd |
= |
The depth of the neutral axis on the cracked section in 'mm' |
46. |
Ku |
= |
Neutral Axis Parameter being the Ratio, at Ultimate Strength Under any Combination of Bending and Compression, of the Depth to the Neutral Axis from Extreme Compression fibre to D. |
47. |
Kuo |
= |
Ratio of Depth to Neutral Axis from extreme Compressive fibre; at ultimate strength |
48. |
Kv |
= |
Coefficient used for Allowable Shear |
49. |
L |
= |
Length of footing base in 'mm' |
50. |
L1 |
= |
Length of sloped footing at top in 'mm' |
51. |
Leff |
= |
Effective length of footing in 'mm' |
52. |
LoffL |
= |
Footing offset along L on left side of column in 'mm' |
53. |
LoffR |
= |
Footing offset along L on right side of column in 'mm' |
54. |
M*ex |
= |
Eccentricity moment along column D 'kNm' |
55. |
M*ey |
= |
Eccentricity moment along column B 'kNm' |
56. |
M*x |
= |
Bending Moment along column D in 'kNm' |
57. |
M*x' |
= |
Bending Moment along column D due to odd shaped column 'kNm' |
58. |
M*xx |
= |
Total Bending Moment along column D (M*x + M*x' + M*ex) in kNm' |
59. |
M*y |
= |
Bending Moment along column B in 'kNm' |
60. |
M*y' |
= |
Bending Moment along column B due to odd shaped column in 'kNm' |
61. |
M*yy |
= |
Total Bending Moment along column D (M*y + M*y' + M*ey) in 'kNm' |
62. |
N* |
= |
Axial load for footing sizing in 'kN' |
63. |
N*comb |
= |
Axial load from Load Combination in 'kN' |
64. |
OB |
= |
Maximum permissible offset on bottom side of column in plan in 'mm' |
65. |
OL |
= |
Maximum permissible offset on left side of column in plan in 'mm' |
66. |
OR |
= |
Maximum permissible offset on right side of column in plan in 'mm' |
67. |
OT |
= |
Maximum permissible offset on top side of column in plan in 'mm' |
68. |
P1 |
= |
Soil pressure at corner 1 in 'kN/sqm' |
69. |
P2 |
= |
Soil pressure at corner 2 in 'kN/sqm' |
70. |
P3 |
= |
Soil pressure at corner 3 in 'kN/sqm' |
71. |
P4 |
= |
Soil pressure at corner 4 in 'kN/sqm' |
72. |
Pdelta |
= |
Column Load to be transferred by reinforcement |
73. |
Pt |
= |
Calculated percentage tensile reinforcement |
74. |
q |
= |
Surcharge Load In 'kN/sqm' |
75. |
sp |
= |
Spacing Between bars at outer most layer in 'mm' |
76. |
SPu |
= |
Upward Soil Pressure in 'kN/sqm' |
77. |
SPuB |
= |
Upward Soil Pressure from bottom 'kN/sqm' |
78. |
SPuL |
= |
Upward Soil Pressure from left 'kN/sqm' |
79. |
SPuR |
= |
Upward Soil Pressure from right 'kN/sqm' |
80. |
SPuT |
= |
Upward Soil Pressure from top 'kN/sqm' |
81. |
V* |
= |
Design shear force in'kN' |
82. |
V*x |
= |
Shear along major axis (along Column D) in'kN' |
83. |
V*y |
= |
Shear along minor axis (along Column B) in 'kN' |
84. |
Vps |
= |
Design Shear Force for Punching Shear Check in 'kN' |
85. |
Vu |
= |
Ultimate Shear Strength of Footing with Effect of Moment in 'kN' |
86. |
Vuc |
= |
Permissible Shear Capacity in concrete 'kN' |
87. |
Vuo |
= |
Ultimate Shear Strength of Footing without Effect of Moment in |
88. |
Vus |
= |
Design shear force to be resisted by Fitment in 'kN' |
89. |
Vumax |
= |
Maximum Shear Capacity for one-way shear force in 'kN' |
90. |
w |
= |
Calculated maximum crackwidth in the concrete member in 'mm' |
91. |
Waterpr |
= |
Upward water pressure in 'kN/sqm' |
92. |
Waterup |
= |
Upward force due to water in 'kN' |
93. |
Wcr |
= |
Surface Crack Width in 'mm' |
94. |
Zx |
= |
Section modulus of footing base along L in 'mm3' |
95. |
Zy |
= |
Section modulus of footing base along B in 'mm3' |
96. |
α2 |
= |
Coefficient for Compressive Stress Block |
97. |
α2 |
= |
Constant used for calculation of stress in concrete for rectangular stress block |
98. |
α2 |
= |
Constant used for crackwidth calculation based on Hypothetical thickness of section (th) |
99. |
α3 |
= |
Coefficient used for creep calculation, 0.7x (k4 x α2) |
100. |
γ |
= |
Ratio of Depth of the assumed rectangular stress block to kud |
101. |
γ |
= |
The ratio, under design bending or design combined bending and compression, of the depth of the assumed rectangular compressive stress block to kud |
102. |
εcc |
= |
The creep strain in the concrete |
103. |
εx |
= |
Longitudinal Strain in the Concrete at the Mid Depth Of The Section |
104. |
σo |
= |
The compressive stress in concrete assuming a cracked section in 'N/sqmm' |
105. |
σ o, Perm |
= |
Permissible compressive stress in concrete assuming a cracked section in 'N/sqmm' |
106. |
σ scr, Perm |
= |
Permissible stress in the tensile reinforcement assuming a cracked section in 'N/sqmm' |
107. |
Φ |
= |
Capacity Reduction Factor |
108. |
Φcc |
= |
Design creep coefficient for concrete |
109. |
Φcc.b |
= |
Basic creep co-efficient |
|
Code References: |
AS 3600 : 2018 |
Sr.No. |
Item |
|
Clause / Table |
1. |
Capacity reduction factor |
: |
Table 2.2.2 |
2. |
F'ctf |
: |
3.1.1.3 |
3. |
α2 |
: |
8.1.3 (1) |
4. |
γ |
: |
8.1.3 (2) |
5. |
Ast min |
: |
21.3.1 |
6. |
Allowable Shear (for One Way Shear Check) |
: |
8.2.4.1 |
7. |
Shear Coefficient Factor |
: |
6.10.2.4 |
8. |
Ultimate Strength in Bending |
: |
8.1.6.1 |
9. |
Effective Shear Depth, Dv |
: |
8.2.1.9 |
10. |
Kv, θv |
: |
8.2.4.3 |
11. |
εx |
: |
8.2.4.2.2 |
12. |
Vu-max |
: |
8.2.3.3 |
13. |
Check for Vu-max |
: |
8.2.3.4 |
14. |
βh |
: |
9.3.3 (Figure 9.3 (A)) |
15. |
Dimension of Critical Shear Perimeter (a) |
: |
9.3.3 (Figure 9.3 (A)) |
16. |
Shear Strength of footing Vuo (for Punching Shear Check) |
: |
9.3.3 |
17. |
Shear Strength of footing Vu (for Punching Shear Check) |
: |
9.3.4 |
18. |
Load Transfer |
: |
12.6 |
|
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