Structural Engineering

API RP 2GEO / FHWA NHI-16-009 Static Axial Capacity of Driven Piles in Cohesionless and Cohesive Soils Calculator

API RP 2GEO / FHWA NHI-16-009 Static Axial Capacity of Driven Piles in Cohesionless and Cohesive Soils engineering calculator.

Quick Answer

Calculate API RP 2GEO / FHWA NHI-16-009 Static Axial Capacity of Driven Piles in Cohesionless and Cohesive Soils

Calculator

Axial compressive/tensile capacity (N)
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Result Interpretation

API RP 2GEO / FHWA NHI-16-009 Static Axial Capacity of Driven Piles in Cohesionless and Cohesive Soils Calculator computes Axial compressive/tensile capacity in N using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

  • Toe bearing resistance = 850000
  • Skin friction resistance = 1250000
  • Tensile resistance (negative for compression-only interpretation) = 300000
  • Group efficiency factor (for single pile: 1.0) = 1

Expected Result:

  • Axial compressive/tensile capacity = 1800000

Engineering Interpretation:

Under the given input conditions, the calculated result is: Axial compressive/tensile capacity = 1800000 N.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

axial compressive/tensile capacity = (skin friction resistance + toe bearing resistance) * for single pile: 1.0 - negative for compression-only interpretation

Formula family: formula_structural_foundation_pile_axial_capacity_calculator_static_analysis_api_rp_2geo_fhwa_nhi_16_009

Variables

SymbolLabelRoleDescription
Q_s Skin friction resistance INPUT Skin friction resistance
Q_p Toe bearing resistance INPUT Toe bearing resistance
Q_t Tensile resistance (negative for compression-only interpretation) INPUT Tensile resistance (negative for compression-only interpretation)
efficiency_factor Group efficiency factor (for single pile: 1.0) INPUT Group efficiency factor (for single pile: 1.0)
result Axial compressive/tensile capacity OUTPUT Axial compressive/tensile capacity
API_RP_2GEO_gamma_factor API_RP_2GEO_gamma_factor CONSTANT API_RP_2GEO_gamma_factor = 1 dimensionless
FHWA_NHI_16_009_phi_reduction_factor FHWA_NHI_16_009_phi_reduction_factor CONSTANT FHWA_NHI_16_009_phi_reduction_factor = 0.9 dimensionless

Calculation Steps

  1. Enter the skin friction resistance in N.
  2. Enter the toe bearing resistance in N.
  3. Enter the tensile resistance (negative for compression-only interpretation) in N.
  4. Enter the group efficiency factor (for single pile: 1.0) in dimensionless.
  5. Step 1: Compute axial compressive/tensile capacity.
  6. Read the axial compressive/tensile capacity (N) from the results.

Engineering Summary

Calculate API RP 2GEO / FHWA NHI-16-009 Static Axial Capacity of Driven Piles in Cohesionless and Cohesive Soils

Frequently Asked Questions

What does this calculator calculate?

The API RP 2GEO / FHWA NHI-16-009 Static Axial Capacity of Driven Piles in Cohesionless and Cohesive Soils Calculator estimates Axial compressive/tensile capacity based on the input parameters you provide

Why is skin friction resistance important in this calculation?

skin friction resistance is directly proportional to axial compressive/tensile capacity. When you enter skin friction resistance in N, the calculator uses it in the engineering formula to compute the output

How should I interpret the result axial compressive/tensile capacity?

The calculator outputs axial compressive/tensile capacity in N. For larger forces, you can divide by 1000 to express the result in kN. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Skin friction resistance (N), Toe bearing resistance (N), Tensile resistance (negative for compression-only interpretation) (N), Group efficiency factor (for single pile: 1.0) (dimensionless). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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