Verification Based on Safety Factor
The program performs verification analysis of the micropile cross-section and root:
Verification of the micropile cross-section
Both, internal stability of section and cross-section bearing capacity, are verified.
1. Internal stability of section
where: | Ncr | - | standard critical normal force, calculated in dependence on the method set in the "Micropiles" tab |
Nmax | - | maximal normal force entered in the frame "Load" | |
SFf | - | critical force safety factor entered in the "Micropiles" tab |
2. Cross-section bearing capacity
where: | Rs | - | standard strength of steel, entered in the frame "Material" |
σs | - | stress in steel, calculated according to the way of load (section loaded only by normal force or by a combination of bending moment and normal force) | |
SFs | - | safety factor of section resistance, entered in the "Micropiles" tab |
Verification of the root
where: | Q | - | standard root bearing capacity, calculated in dependence on used method (see "Bearing capacity of the micropile root section") |
Nmax | - | maximal normal force entered in the frame "Load" | |
SFr | - | root resistance safety factor entered in the "Micropiles" tab |