List of Symbols

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Abbreviations, Acronyms, and Initialisms

  • CFT — Concrete-Filled Steel Tube
  • HT — hollow steel tube
  • NA — test data not available or category not applicable for given test
  • RC — reinforced concrete
  • SRC — steel reinforced concrete (encased steel shape)
  • CFDST — concrete-filled double skin steel tubular

Symbols

  • Ac — cross-sectional area of concrete
  • As — cross-sectional area of steel
  • D — outer diameter of circular tubes or depth (largest dimension) of rectangular tubes
  • Ec — modulus of elasticity of concrete
  • Es — modulus of elasticity of steel
  • Fy — yield strength of steel
  • Gc — shear modulus of elasticity of concrete
  • Gs — shear modulus of elasticity of steel
  • Ic — moment of inertia of concrete
  • Is — moment of inertia of steel
  • K — effective length factor
  • L — member length
  • Mno — computed nominal bending moment capacity
  • Pno — computed nominal axial load capacity of CFT (i.e., cross-section strength)
  • e — eccentricity of applied load
  • ex, ey — eccentricities of applied load about the major and minor axes, respectively
  • f'c— characteristic 28-day cylinder strength of concrete
  • f'cc — confined concrete strength (ksi)
  • t — steel tube thickness
  • wc — density of concrete