Earthbag Construction Seismic Load Calculations - tinyurl.com/earthbag-seismic

	A	B	C	D	E	F	G	H
1
2	Note: This spreadsheet is for initial calculations only. All numbers should be confirmed by an engineer licensed in your state/country to assure safety.
3	EARTHBAG WALL ANALYSIS NEAR DOOR OPENINGS, UNDER GRAVITY CONDITIONS			Shear Resistance of Earthbags
4							Convert to Radians Here
5	R, Radius of Dome @ H2 above ground	5.5	ft	Coeff. of Friction	0.43		Input Angle	45
6	H2, Height of Doorway	8.8	ft				Angle in Radians	0.785
7	Weight Density of Earthbag	130	lb/ft^3	Due to Earthbags @ Door Supports
8	W (Width of Doorway)	3.42	ft	Shear Strength at Top of Door	403.5950579	lb/ft
9	H1 (Height of Earthbag dome above Door Opening)	7	ft	Shear Strength at Bottom of Doorway	933.3550579	lb/ft
10	B, (Breadth of Earthbag)	1	ft
11	Slope of Dome in Radians (Radians, See Cell H3 to Cell I5)	0.785	radians	Due to Earthbags along Dome Perimeter
12	Rp, Distance of Point of application of axial load from top of doorway	1.83	ft	Shear Strength at Top of Door	153.4505149	lb/ft
13	T, Thickness of Wall	1	ft	Shear Strength at Bottom of Doorway	683.2105149	lb/ft
14	A_Tributary, Tributary area of load due to dome sloping	18.97	ft^2
15				Total Circumference of Earthbag Required to resist "H"
16	Dead Load due to Stucco Finishing	10	psf	L_Req, Length of Earthbag Required	9.703310586	ft
17	Snow Loading	57	psf
18				L_Provided =	34.55751919	ft
19	Loads due to Opening, along Slope
20
21	Wt, Self Weight of Earthbag Dome	2466.1	lb	Hence	OK
22	Dst, DL due to Stucco	189.7	lb
23	DL_total=Wt+Dst	2655.8	lb
24	S, Snow Load	1081.29	lb
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26	Unfactored Loads @ Supports of Door
27		DL (lbs)	Snow (lbs)
28	H, Horizontal Load due Dome Total Dead Load & Snow Load	939.3408826	382.4459308
29	P, Vertical Load due to Dome Total Dead Load & Snow Load	938.593158	382.1415
30
31	Maximum Load Combinations for LRFD as per ASCE 7-16 Chapter 2
32	Case 1: 1.4DL
33	H	1315.077236	lb
34	P	1314.030421	lb
35	Case 2: 1.2DL + 0.5S
36	H	1318.432025	lb
37	P	1317.38254	lb
38	Case 3: 1.2DL+1.6S
39	H	1739.122548	lb
40	P	1737.73819	lb
41
42	M, Maximum Buckling Moment	3180.060887	lb-ft
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