Evo
Design  structural engineering

Calculation
No.


001FOUNDATION

INTERACTIVE ONLINE CALCULATION SHEET

Project No.









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onlinestructuraldesign.com

SAMPLE
CALCULATION

Project
Title:

Foundation calculation  interactive design
spreadsheet


Calc. By

Date

Rev.










MN

16.04.2014

0

Subject/Feature:

Foundation design; Foundation maximum soil pressure
calculation


Checked By

Date



Imperial Units spreadsheet


CN

16.04.2014














InputÂ

Output






Working loads

Eccentricity






Footing dimensions

Max. pressure on soil under foundation






Pier dimensions







Materials (soil, concrete)
























per EN
199311 and EN 199318













Maximum
working loads







pair of maximum loads.
Mx and My are not


N =


kN

axial force




considered
simultaneous. Values are factored,

M =


kN*m

bending moment




Ultimate Limit State
(ULS)



F =


kN

horizontal force on top
of foundation


Maximum
working loads for the soil pressure calculation









are
determined with the load factors in EN 1990

Footing Dimensions







Annex 1
Table A1.2 (Set C)

L =


mm

Foudation base length






W =

2000

mm

Foundation base width






t =

500

mm

Foundation base thickness







(parameters that can not be modified in the demo
version)






f =


mm

Depth to top of foundation base


















Pier Dimensions











l =


mm

pier dimension along X






w =


mm

pier dimension along Z






h =


mm

pier height


















Materials











Fill material
characteristics











Unit weight of fill
material











r_{fill} =


kN/m^{3} (Unit weight of fill material)



















Concrete
characteristics











Unit weight of
concrete










r_{concrete} =


kN/m^{3 }Unit weight of concrete



Unit weight
of fill













Total fill weight
above foundation






G_{fill} =


m^{3} *
r_{fill} =


kN

















Total foundation
concrete weight









G_{concrete} =


m^{3} *
r_{fill} =


kN




















Loads transfered to
the ground (for the calculation of soil max. pressure)






g_{G,j,sup} =








per EN 1990

N_{base} =

g_{G,j,sup} * (G_{fill} + G_{concrete}) + N =


kN



Annex 1 Table
A1.2 (Set C)

M_{base} =

F_{x} * (t + h) + M =


kN*m




The
value for g may be modified
by the National Annex

e =

M_{base}/N_{base} =


mm eccentricity








L/6 =


mm









L/2 =


mm










e






















M_{base}
=


kN*m






















N_{base}
=


kN


























Foundation Base









































































































































References:












EN 199711:2004  Eurocode 7: Geotechnical design  Part 6 
Surface foundations
