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GEO5

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Verification Based on Limit States

The program performs verification analysis of the micropile tube and root:

Verification of the cross-section (tube)

Both, internal stability of section and coupled section bearing capacity, are verified.

1. Internal stability of section

where:

Nmax

-

maximal normal force, entered in the frame "Load"

Ncrd

-

design critical normal force

where:

Ncr

-

standard critical normal force, calculated in dependence on the method set in the "Micropiles" tab

γmf

-

reduction coefficient of critical force, entered in the "Micropiles" tab (limit states)

2. Coupled section bearing capacity

where:

σs

-

stress in steel, calculated according to the way of load (section loaded only by normal force or by combination of bending moment and normal force)

Rsd

-

design strength of steel

where:

Rs

-

standard strength of steel, entered in the frame "Material"

γss

-

reliability coefficient of steel, entered in the "Micropiles" tab (limit states)

Verification of the root

where:

Nmax

-

maximal normal force, entered in the frame "Load"

Qrd

-

design root bearing capacity

where:

Q

-

standard root bearing capacity, calculated in dependence on used method (see "Bearing capacity of the micropile root section")

γr

-

reduction coefficient of root resistance, entered in the "Micropiles" tab (limit states)