60925370 Design of RCC Footing as Per ACI 318 95 Ed
2
Prepared by: Date: Job No.: Sheet: A B Quadri 25/07/11 Cont'd: Verified by: Date: Revision Notes: A B Quadri 26-Jul-11 Project: Subject: Description: REF Design of RCC Footing as per ACI-318-95 ed 1800 30 N/mm2 410 N/mm2 150 KN/m2 18 KN/m3 400 mm 600 mm 1400 75 mm 14 mm 3 KN 25 KN PLAN 1800 mm 1400 mm e P 400 mm 600 mm 3 m2 F.F.L. H 1 m4 0 24 KN F.G.L. 318 mm Effective Width(b) 1400 mm 600 P e H (KN) (mm) (KN) 36 0 1 17 0 3 Wind LOad -53 0 33 400 OUTPUT CALCULATION Length of Footing(L) Width of Footing(W) Al Atiqui Concrete Mixing Plant - Sulaibiya 0 Footing F3 Width of column Length of colum Abq Consultants CALCULATION SHEET Area of Base(A) (I) of Base Weight Effective Depth(d) DESIGN DATA Footing Size Cover to reinforce. Bar diameter Weight of column Weight of soil Thickness of Footing(T) Depth of Soil(D) Concrete strength, f'c Steel strength, fy Soil bearing capcity Unit weight of soil Service Loads Load Type Dead Load Live Load SOIL PRESSURES AT SERVICE LOADS pressure heel eo toe ex R R (KN) 105 Qa max 47 OK 47 ex (mm) 938 Qa min 36 OK 36 eo (mm) 38 Qa min Qa max R (KN) 39 Qa max 52 OK 97 ex (mm) 1608 Qa min -21 UPLIFT 0 SOIL PRESSURE eo (mm) 708 face center d 48 P dead+wind -3 25 Wt. col.+Ftg. 25 W5 22 Wt. of Soil 22 W4 95 Total R.M. 44 W3 b)Overturn. Mom. at heel W2 4 H dead+wind 26 W1 Total O.M. (Kn.m) 4 26 23.69 Factor of safety= 1.696 NET UPWARD PRESSURES >1.5 OK >1.5 OK Prep By : A B Quadri- Abq Consultants - 9959010210 - [email protected]/2 Royal Residency, Besides Amba talkies, Mehdipatnam , Hyderabad-India. 500028-www.abqconsultants.com Total O.M.(Kn.m) SOIL PRESSURES AT SERVICE LOADS [Qa=R/A+R(eo)(c)/I] Load Case #1 :DL+LL Load Case#2:75%(DL+LL+WL) CHECKING OVERTURN.UNDER SERVICE LOADS Load Case #1:(DL+LL) Load case #2:(DL+WL) a)Resisting Moments at toe a)Resisting Mom.at heel P dead+live (Kn.m) Wt. col.+Ftg.(Kn.m) pressure Wt. of Soil (Kn.m) Total R.M. (Kn.m) b)Overturning Mom. at toe H dead+live(Kn.m) Factor of safety=
description
FootingACI
Transcript of 60925370 Design of RCC Footing as Per ACI 318 95 Ed
Prepared by: Date: Job No.: Sheet:
A B Quadri 25/07/11 Cont'd:
Verified by: Date: Revision Notes:
A B Quadri 26-Jul-11
Project:
Subject: Description:
REF
Design of RCC Footing as per ACI-318-95 ed
1800
30 N/mm2
410 N/mm2
150 KN/m2
18 KN/m3
400 mm
600 mm 1400
75 mm
14 mm
3 KN
25 KN
PLAN
1800 mm
1400 mm e P
400 mm
600 mm
3 m2 F.F.L. H
1 m4 0
24 KN F.G.L.
318 mm
Effective Width(b) 1400 mm
600
P e H
(KN) (mm) (KN)
36 0 1
17 0 3
Wind LOad -53 0 33 400
OUTPUT CALCULATION
Length of Footing(L)
Width of Footing(W)
Al Atiqui Concrete Mixing Plant - Sulaibiya
0 Footing F3
Width of column
Length of colum
Abq Consultants
CALCULATION SHEET
Area of Base(A)
(I) of Base
Weight
Effective Depth(d)
DESIGN DATA
Footing Size
Cover to reinforce.
Bar diameter
Weight of column
Weight of soil
Thickness of Footing(T)
Depth of Soil(D)
Concrete strength, f'c
Steel strength, fy
Soil bearing capcity
Unit weight of soil
Service Loads
Load
Type
Dead Load
Live Load
SOIL PRESSURES AT SERVICE LOADS
pressu
reheel eo toe
ex R
R (KN) 105 Qa max 47 OK 47
ex (mm) 938 Qa min 36 OK 36
eo (mm) 38
Qa min Qa max
R (KN) 39 Qa max 52 OK 97
ex (mm) 1608 Qa min -21 UPLIFT 0 SOIL PRESSURE
eo (mm) 708
face
center d
48 P dead+wind -3
25 Wt. col.+Ftg. 25 W5
22 Wt. of Soil 22 W4
95 Total R.M. 44 W3
b)Overturn. Mom. at heel W2
4 H dead+wind 26 W1
Total O.M. (Kn.m) 4 26
23.69 Factor of safety= 1.696 NET UPWARD PRESSURES
>1.5 OK >1.5 OK
Prep By : A B Quadri- Abq Consultants - 9959010210 - [email protected]/2 Royal Residency, Besides Amba talkies, Mehdipatnam , Hyderabad-India. 500028-www.abqconsultants.com
Total O.M.(Kn.m)
SOIL PRESSURES AT SERVICE LOADS
[Qa=R/A+R(eo)(c)/I]
Load Case #1 :DL+LL
Load Case#2:75%(DL+LL+WL)
CHECKING OVERTURN.UNDER SERVICE LOADS
Load Case #1:(DL+LL) Load case #2:(DL+WL)
a)Resisting Moments at toe a)Resisting Mom.at heel
P dead+live (Kn.m)
Wt. col.+Ftg.(Kn.m)
pressu
re
Wt. of Soil (Kn.m)
Total R.M. (Kn.m)
b)Overturning Mom. at toe
H dead+live(Kn.m)
Factor of safety=
Prepared by: Date: Job No.: Sheet:
A B Quadri 25/07/11 Cont'd:
Verified by: Date: Revision Notes:
A B Quadri 26-Jul-11
Project:
Subject: Description:
REF
79 Kn -8 Kn -37 Kn
82 mm -5796 mm -1200 mm
W1, 0.90 m 40 Kn/m2 -65 Kn/m2 -72 Kn/m2
W2, 0.62 m 37 Kn/m2 -46 Kn/m2 -54 Kn/m2
W3, 0.30 m 34 Kn/m2 -24 Kn/m2 -34 Kn/m2
W4, 0.00 m 31 Kn/m2 -3 Kn/m2 -14 Kn/m2
W5, -0.90 m 23 Kn/m2 59 Kn/m2 43 Kn/m2
bo= 3272 mm Ao= 0.66 m2 Vult. =
V ult. = (W4) (Af-Ao) 0.28 w1+w2 1.40 / 2
Vult.1 = 59 Kn Govern Vult. 1= 15 Kn Govern
Vult.2 = -6 Kn Vult.2 = -22 Kn
Vult.3 = -27 Kn Vult.3 = -25 Kn
V con.= 0.85 sqr(f'c) bo d/3 V con.= 0.85 sqr(f'c) b d / 6
1615 Kn >Vult. OK 345 Kn OK
M ult. = [width] M ult. = Length
Mult.1 = 10 Kn.m. Govern Mult.1 = 7 Kn.m. Govern
Mult.2 = -13 Kn.m. Mult.2 = -1 Kn.m.
Mult. 3= -15 Kn.m. Mult. 3= -3 Kn.m.
1400 mm & 318 mm 1800 mm & 304 mm
0.3415 & 2.3554 % 0.3415 & 2.3554 %
7.05 N/mm2 7.05 N/mm2
997 KN.m. 1172 KN.m.
10 KN.m. 7 KN.m.
0.07 N/mm2 0.04 N/mm2
82 mm2 & 1008 mm2 63 mm2 & 1296 mm2
7 Φ 14 9 Φ 14
1078 mm2 ( 0.242 %) 1385 mm2 ( 0.192 %)
344 & 775 mm 344 & 661 mm
OUTPUT
Prep By : A B Quadri- Abq Consultants - 9959010210 - [email protected]/2 Royal Residency, Besides Amba talkies, Mehdipatnam , Hyderabad-India. 500028-www.abqconsultants.com
Al Atiqui Concrete Mixing Plant - Sulaibiya
CALCULATION
0 Footing F3
NET ULTIMATE UPWARD PRESSURES[Wu=Ru/A+Ru(eo)(c)/I]
Abq Consultants
CALCULATION SHEET
Case # 3
0.90D+1.3W
Resultant force, Ru
Eccentricity, eo
CHECK FOR PUNCHING SHEAR CHECK FOR DIAGONAL SHEAR
Upward pressures and
distances from center
Case # 1
1.4D+1.7L
Case # 2,75%OF
1.4D+1.7L+1.7W
(d/2 from face of column) ( d from face of column)
[(2W1+W3) Lx2 / 6] [w4 Ly2 / 2 ]
CHECK FOR FLEXURE (at face of column)
Along Minor Axis ( y-y)
b eff. & d eff.
Rho min. & Rho max.
Ku maximum
M concrete = Ku bd2
Descriptions
As req'd & As temperature
Reinforcement
As provided
Ldb req'd &Ldb actual
Along Major Axis ( x - x)
M ultimate
Mu / bd2
