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Simplified Shear Design of Structural Concrete Members (2005) / Chapter Skim
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Notation
Pages 50-52

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From page 50...
... (≈ 0.9f ′c) fcr = concrete stress at tensile cracking fct = concrete tensile stress fcx = concrete stress in direction x fd = stress due to unfactored dead load fpc = compressive stress in concrete after all prestress losses have occurred either at centroid of the cross-section resisting live load or at the junction of the web and flange when the centroid lies in the flange fpe = effective stress in the prestressing steel after losses; compressive stress in concrete due to effective prestress forces only at extreme fiber of section where tensile stress is caused by externally applied loads fpo = Ep times locked in difference in strain at ultimate load between the prestressing tendons and the surrounding concrete fps = stress in prestressing steel fpu = tensile strength of prestressing steel fsx = steel stress in direction x fsy = steel stress in direction y ft = tensile strength of concrete fv = shear stress; stress in shear reinforcement; vertical stress fx = stress in direction x fy = yield strength of reinforcing bars; stress in direction y h = overall thickness or depth of member
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From page 51...
... shear stress vu = Vu/bvdv vutest = Vtest/bvdv or Vtest/bwd vxy = shear stress yt = distance from neutral axis to extreme tension fiber for uncracked section α = angle of inclination of transverse reinforcement to longitudinal axis of member αp = angle between prestressing force and longitudinal axis of member (JSCE 1986) β = factor relating effect of longitudinal strain on the shear capacity of concrete, as indicated by the ability of diagonally cracked concrete to transmit tension βd = depth effect parameter in JSCE shear strength evaluation procedure βn = coefficient to account for prestress and axial load in JSCE shear strength evaluation procedure βp = coefficient to account for longitudinal reinforcement ratio effect in JSCE shear strength evaluation method γxy = shear strain 1 = strain in concrete in direction 1; principal tensile strain 2 = strain in concrete in direction 2
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From page 52...
... 52 t = strain at level of longitudinal reinforcement on tension side of member x = strain in direction x; longitudinal strain at mid-depth of section y = strain in direction y; strain at yield of reinforcing steel θ = angle of inclination of diagonal compressive stress ν = parameter determining maximum nominal shear capacity for EC2 method ϕ = resistance factor ρl = longitudinal reinforcement ratio = [As + Aps] /bwd ρsx = steel ratio for direction x ρsy = steel ratio for direction y ρv = ratio of area of vertical shear reinforcement to area of gross concrete area of a horizontal section = Av/bws ρw = As/bwd
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Key Terms

  • shear strength
  • concrete stress
  • transverse reinforcement
  • strength evaluation
  • shear capacity

  • direction x
  • prestressing steel
  • flexural tension
  • shear stress
  • jsce shear

  • ultimate load
  • evaluation method
  • applied loads
  • externally applied
  • shear reinforcement

  • tensile stress
  • tensile strength
  • web width
  • steel stress
  • evaluation procedure

  • compressive stress
  • tension reinforcement
  • longitudinal reinforcement
  • reinforcement ratio
  • dead load

  • compressive strength
  • unfactored dead
  • reinforcing bars
  • concrete cylinder
  • concrete section


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