Pc- Reviewer

Cards (61)

  • ASTM A416M
    Strand
  • ASTM A421M
    Wire
  • ASTM A421M
    Low relaxation wire
  • ASTM A722M
    High strength bar
  • Loads shall include
    Self-weight
    Applied loads
    Effects of prestressing
    earthquakes
    Restraint of volume changes
    differential settlement
  • reduction factor of bearing
    0.65
  • reduction factor of shear
    0.75
  • reduction factor of torsion
    0.75
  • reduction factor of post tensioned anchorage zone
    0.85
  • reduction factor of brackets and corbels
    0.75
  • reduction factor of struts, ties, nodal zone
    0.75
  • reduction factor of Components of connection of precast member controlled by yielding of steel elements in tension
    0.90
  • reduction factor of plain concrete elements
    0.60
  • reduction factor of anchors in concrete elements
    0.45 - 0.75
  • Require strength U shall include internal load effects due to reactions induce by prestressing with a load factor of
    1
  • For post tensioned anchorage zone design, design A load factor of 1.2 shall be applied to the maximum prestressing reinforcement jacking force
  • U, T, C
    Prestress slab shall be classified as
  • For slabs with bonded prestressed reinforcement total quantity of As and Aps shall be adequate to develop a factored load at least 1.2 times the cracking load calculated on the basis of fr as give.
  • Eccentricity
    Between tendons and the concrete centroid
  • Ln/3
    Length of deformed reinforcement in positive moment shall be at least
  • ln/6
    Length of deformed reinforcement in each side of support shall be at least
  • 1.8m
    distance between face of beam or wall to the nearest slab tendon shall not exceed to (blank)
  • 1.4m
    If spacing of slab tendons exceeds (blank) additional deformed shrinkage and temperature reinforcement
  • twice
    for slabs with both flexural and shear design strength at least (blank) the required strength
  • C T
    for class -----and --- members, stresses at service load shall be calculated using the uncracked section
  • C
    for class ----- members, stresses at service load shall be calculated using the cracked transformed section
  • Act
    is the are of that part of the cross-section between the flexural tension face and the centroid of the gross section.
  • 0.7 Mpa
    prestressed reinforcement to resist shrinkage and temperature stresses shall conform to the table and the effective prestress after losses shall provide and average compressive stress of at least ( blank) on gross concrete area
  • 1860 MPa
    the maximum value of fpu permitted for design calculations A416M (strand)
  • 1725 MPa
    the maximum value of fpu permitted for design calculations A421M (wire)
  • 1035 MPa
    the maximum value of fpu permitted for design calculations A722M (high strength bar)
  • flexural cracking
    bonded reinforcement shall be distributed to control _____ in tension zones of non-prestress and class C prestressed slabs and beams
  • 250 Mpa
    the values of delta Fps shall not exceed to ___
  • local and general
    anchorage regions of post-tensioned tendons shall consist of two zones
  • Local zone
    shall be assumed to be a rectangular prism (equivalent rectangular prism for circular or oval anchorages) of concrete
  • general zone
    includes the local zone and shall be assumed to be the portion of the member through which the concentrated prestressing force is transferred
  • Special anchorage devices
    Are used, supplementary skin reinforcement shall be provided in addition to the confining reinforcement specified for the anchorage device
  • Supplementary skin reinforcement
    Shall be similar in configuration and at least equivalent in volumetric ratio to any supplementary skin reinforcement used in the qualifying acceptance tests of the anchorage device.
  • Methods shall be permitted for design of general zones

    Strut and tie models
    linear stress analysis
    simplified equations
  • 1.5
    minimum edge distance is less than __ times the anchorage device lateral dimensions in that direction