ConcreteXSection

Service and Ultimate level force analysis of concrete cross sections

ToDo:

• Repository Licensing - ** 3-Clause BSD **
• Programming Languages to Support - ** Python and VBA **
• National Building Codes to Support
• ACI 318
• EN 1992-1-1 December 2004
• CSA

Concrete Compression Stress Block Formulations for Sections defined by straight lines:

• Whitney Block
  • verified - Area * 0.85 * F'c
• PCA Parabolic+Linear Stress Block
  • verified - see backup material verified against 3 point Gauss Integration
• Eurocode 2 Parabolic + Linear Stress Block (eq 3.17) - Parametric Formula derived needs verification
• Eurocode 2 Bi-Linear - Section 3.1.7 (2)
• User Defined Piecewise Linear

Concrete Compression Stress Block Formulations for Circular Sections:

• Whitney Block
  • verified - Segment area * 0.85 * F'c
• PCA Parabolic + Linear Stress Block
  • verified - verification via 100 discrete trapezoid slices through parabolic region
• Eurocode 2 Parabolic + Linear Stress Block (eq 3.17) - Researching, When n=2 similar to PCA when n<2 numeric integration may be the best option
• Eurocde 2 Bi-Linear - Section 3.1.7 (2)
• User Defined Piecewise Linear

Steel Stress-Strain Relationship:

• Elastic Constant - Stress = Fy beyond yield point
• Elastic + Linear Plastic - Stress in plastic region increases linearly
• User Defined Piecewise linear

Checks not done by anyone that probably should be done:

• strain in steel < rupture strain