CircularFooting(General Download).xls

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R
1	Daniel
2	Daniel					PROJECT :										PAGE :
3	Tian Li					CLIENT :										DESIGN BY :
4	Tian Li					JOB NO. :				DATE :						REVIEW BY :
5	Circular Footing Design Based on ACI 318-02
6
7	INPUT DATA & DESIGN SUMMARY
8	COLUMN DIAMETER				dcol =	12	in
9	COLUMN DEAD LOAD				PDL =	40	kips
10	COLUMN LIVE LOAD				PLL =	38	kips
11	LATERAL LOAD (0=Wind, 1=Seismic)					0	Wind,ASD
12	WIND AXIAL LOAD				PLAT =	5	k, ASD
13	WIND MOMENT LOAD				MLAT =	39.5	ft-k, ASD
14	WIND SHEAR LOAD				VLAT =	0.15	k, ASD
15	SOIL WEIGHT				ws =	0.11	kcf
16	FOOTING EMBEDMENT DEPTH				Df =	2	ft
17	FOOTING THICKNESS				T =	18	in
18	ALLOW SOIL PRESSURE				Qa =	2.5	ksf
19	FOOTING DIAMETER				D =	7.5	ft
20	CONCRETE STRENGTH				fc' =	3	ksi
21	REBAR YIELD STRESS				fy =	60	ksi
22	FOOTING TOP REBAR				#	4	@	48	in o.c., each way
23	FOOTING BOTTOM REBAR				#	6	@	18	in o.c., each way
24											THE FOOTING DESIGN IS ADEQUATE.
25	ANALYSIS
26	CHECK OVERTURNING FACTOR
27		MR / MO =		9.3	>	F = 1.5				[Satisfactory]
28		Where	MO =	MLAT + VLAT Df - PLAT(0.5 D) =				21	k-ft			MR =	(PDL+ Pftg + Psoil) (0.5 D) =				196	k-ft
29			Pftg =	(0.15 kcf) p T D2/ 4 =			9.94	k, footing weight				F = 1.5 for wind, IBC 1609.1.3
30			Psoil =	ws (Df - T) p D2/ 4 =			2.43	k, soil weight
31
32	COMBINED LOADS AT TOP FOOTING (CBC/UBC 1612.3.2, IBC 1605.3.2 & ACI 318-02 9.2.1)
33	CASE 1:		DL + LL			P =	78.0	kips			1.2 DL + 1.6 LL			Pu	=	108.8	kips
34
35	CASE 2:		DL + LL + 1.3 W			P =	84.5	kips			1.2 DL + LL + 1.6 W			Pu	=	94.0	kips
36						M =	51	ft-kips						Mu	=	63	ft-kips
37						V =	0.2	kips						Vu	=	0.2	kips
38						e =	0.6	ft, fr cl ftg						eu	=	0.7	ft, fr cl ftg
39	CASE 3:		DL + LL + 0.65 W			P =	81.3	kips			0.9 DL+ 1.6 W			Pu	=	44.0	kips
40						M =	26	ft-kips						Mu	=	63	ft-kips
41						V =	0.1	kips						Vu	=	0.2	kips
42						e =	0.3	ft, fr cl ftg						eu	=	1.4	ft, fr cl ftg
43
44	CHECK SOIL BEARING CAPACITY (ACI 318-02 SEC.15.2.2)
45
46		Service Loads			CASE 1			CASE 2			CASE 3
47		P			78.0			84.5			81.3			k
48		e			0.0			0.6			0.3		ft (from center of footing)
49		Pftg - Psoil			7.5			7.5			6.8		k, (footing increasing)
50		S P			85.5			92.0			88.0			k, (net loads)
51		e			0.0			0.6			0.3			ft
52		qmin			1.94			0.83			1.37			ksf
53		x						@ 0.00 ft, from edge			@ 0.00 ft, from edge
54		qmax			1.94			3.33			2.62			ksf
55		qallowable			2.50			3.33			3.33			ksf
56
57				[Satisfactory]
58
59	CHECK FLEXURE & SHEAR OF FOOTING
60	(ACI 318-02 SEC.15.4.2, 10.2, 10.3.5, 10.5.4, 7.12.2, 12.2, 12.5, 15.5.2, 11.1.3.1, & 11.3)
61
62
63																	7.5
64
65
66
67
68																		(cont'd)
69		FACTORED SOIL PRESSURE
70		Factored Loads			CASE 1			CASE 2			CASE 3
71		Pu			108.8			94.0			44.0			k
72		eu			0.0			0.7			1.4			ft
73		g[0.15T + ws(Df - T)] A			14.8			14.8			11.1		k, (factored footing & backfill)
74		S Pu			123.6			108.8			55.1			k
75		eu			0.0			0.6			1.2			ft
76		qu, min			2.80			0.93			0.00			ksf
77		x						@ 0.00 ft, from edge			@ 0.75 ft, from edge
78		qu, max			2.80			4.00			2.81			ksf
79
80		FOOTING MOMENT & SHEAR FOR CASE 1
81		Section				0	1/10 D	2/10 D	3/10 D	4/10 D	Center	6/10 D	7/10 D	8/10 D	9/10 D	D
82		Xu (ft, dist. from left of footing)				0	0.75	1.50	2.25	3.00	3.75	4.50	5.25	6.00	6.75	7.50
83		Tangent (ft)				0.00	4.50	6.00	6.87	7.35	7.50	7.35	6.87	6.00	4.50	0.00
84		TA ( ft2 )				0.00	2.30	3.99	4.86	5.36	11.17	5.36	4.86	3.99	2.30	0.00
85		Mu,col (ft-k)				0	0	0	0	0	0	81.6	163.2	244.8	326.4	408
86		Vu,col (k)				0	0	0	0	0	54.4	108.8	108.8	108.8	108.8	108.8
87		qu,ftg & fill (ksf)				0.34	0.34	0.34	0.34	0.34	0.34	0.34	0.34	0.34	0.34	0.34
88		Mu,ftg & fill (ft-k)				0.00	0.00	0.58	2.16	4.97	9.13	16.11	24.43	33.98	44.53	55.67
89		Vu,ftg & fill (k)				0.00	0.39	1.44	2.93	4.65	7.42	10.20	11.91	13.40	14.46	14.84
90		qu,soil (ksf)				-2.80	-2.80	-2.80	-2.80	-2.80	-2.80	-2.80	-2.80	-2.80	-2.80	-2.80
91		Mu,soil (ft-k)				0	0	-4.826199032	-18.02938624	-41.42739097	-76.06595916	-134.1604099	-203.4954242	-283.0252559	-370.9320759	-463.6650948
92		Vu,soil (k)				0	-3.217466021	-12.01959083	-24.40079462	-38.69104862	-61.82201264	-84.95297667	-99.24323066	-111.6244345	-120.4265593	-123.6440253
93		S Mu (ft-k)				0.00	-2.123395989	-4.25	-15.86	-36.45	-66.93	-36.45	-15.86	-4.25	-2.123395989	0.00
94		S Vu (kips)				0.00	-2.83	-10.58	-21.47	-34.05	0.00	34.0	21.5	10.6	2.8	0.0
95
96		FOOTING MOMENT & SHEAR FOR CASE 2
97		Section				0	1/10 D	2/10 D	3/10 D	4/10 D	Center	6/10 D	7/10 D	8/10 D	9/10 D	D
98		Xu (ft, dist. from left of footing)				0	0.75	1.50	2.25	3.00	3.75	4.50	5.25	6.00	6.75	7.50
99		Tangent (ft)				0.00	4.50	6.00	6.87	7.35	7.50	7.35	6.87	6.00	4.50	0.00
100		TA ( ft2 )				0.00	2.30	3.99	4.86	5.36	11.17	5.36	4.86	3.99	2.30	0.00