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Online Help

GEO5

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Steel Pipe

The Steel pipe requires an input of:

  • Cross-section name (default name is generated by the program, it can be changed using "User def." checkbox)
  • Coefficient of pressure reduction below ditch bottom - this coefficient is used for the reduction of pressures below ditch bottom for calculation of braced sheeting - it can be either input or calculated automatically (for classical non-braced sheeting this coefficient is equal to 1.0)
  • Section length l
  • Spacing of profiles a
  • Correction factor for concrete Kc (pipes filled with concrete)
  • Cross-section type is selected in the dialog window "Catalog of profiles" (button "Catalog")

Parameters input - steel pipe

For the calculation of cross-sectional characteristics of steel pipes filled with concrete, the steel section is converted to concrete.

where:

Ic

-

moment of inertia of the concrete cross-section

Ec

-

elasticity modulus of the concrete

Kc

-

correction factor for concrete

Is

-

moment of inertia of the steel cross-section

Es

-

elasticity modulus of steel

Ac

-

cross-sectional area of concrete

As

-

cross-sectional area of steel

a

-

pile spacing

The verification of the bearing capacity of the steel resp. combined section can be carried out in the "Dimensioning" frame.

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