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Prestressed Concrete Design > Notation > Flashcards

Notation Flashcards

1
Q

shear span, distance between concentrated load and face of supports

A

a

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2
Q

Area that part of a cross section | center of gravity

A

A

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3
Q

Area of concrete section resisting shear transfer

A

Ac

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4
Q

Cross sectional area of member measured to the outside edges

A

Ach

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5
Q

Cross sectional area at one end of a strut

A

Acs

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6
Q

Area ot that part cross section | centroid

A

Act

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7
Q

Gross area of concrete section

A

Ag

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8
Q

Total area of longitudinal reinforcement to resist torsion

A

Al

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9
Q

Minimum area of longitudinal reinforcement to resist torsion

A

Almin

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10
Q

Total area occupied by the duct, sheating

A

Apd

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11
Q

Area of prestressed reinforcement in tension zone

A

Aps

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12
Q

Total area of prestressing reinforcement

A

Apt

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13
Q

Area of non-prestressed longitudinal tension reinforcement

A

As

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14
Q

Area of compression reinforcement

A

A’s

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15
Q

Total cross sectional area of transverse reinforcement including crossties

A

Ash

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16
Q

Minimum area of flexural reinforcement

A

Asmin

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17
Q

Total area of non-prestressed longitudinal reinforcement bars or steel bars

A

Ast

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18
Q

Area of steel shape, pipe, tubing

A

Asx

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19
Q

Total area of longitudinal reinforcement to resist torsion

A

At

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20
Q

Total cross sectional area of all transverse reinforcement within spacing s

A

Atr

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21
Q

Area of non-prestressed reinforcement within spacing s

A

Av

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22
Q

Width of compression face

A

b

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23
Q

Cross sectional dimension of member core

A

bc

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24
Q

Effective flange width

A

bf

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25
Q

Web width or diameter of circular section

A

bw

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26
Q

Distance from extreme compression fiber to neutral axis

A

c

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27
Q

Distance from extreme compression fiber to centroid of longitudinal tension reinforcement

A

d

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28
Q

Distance from extreme compression fiber to centroid of longitudinal compression reinforcement

A

d’

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29
Q

Nominal diameter of wire,bar or prestressing strand

A

db

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30
Q

Distance from extreme compression fiber to centroid of prestressed reinforcement

A

dp

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31
Q

Diameter of pile

A

dpile

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32
Q

Distance from extreme tension fiber to centroid of tension reinforcement

A

ds

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33
Q

Dead loads or related internal moments and forces

Effect of service dead load

A

D

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34
Q

Effect of horizontal and vertical earthquake

A

E

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35
Q

Modulus of elasticity of concrete
-beam
-slab
-prestressing

A

Ec
Ecb
Ecs
Ep

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36
Q

Modulus of elasticity of reinforcement and structural steel

A

Es

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37
Q

Specified compressive strength of comcrete

A

f’c

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38
Q

Compressive strength of concrete at time of initial prestress

A

fci’

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39
Q

Average splitting tensile strength

A

fct

40
Q

Compressive stress in concrete after allowance for all prestress losses

A

fpc

41
Q

Compressive stress due to effective prestress forces

A

fpe

42
Q

Stress in prestressing steel at nominal flexural strength

A

fps

43
Q

Specified tensile strength of prestressing reinforcement

A

fpu

44
Q

Specified yield strength of prestressing reinforcement

A

fpy

45
Q

Modulus of rupture of concrete

A

fr

46
Q

Tensile stess in reinforcement at service loads excluding prestressing reinforcement

A

fs

47
Q

Compressive stess in reinforcement at service loads excluding prestressing reinforcement

A

f’s

48
Q

Effective stress in prestressed reinforcement

A

fse

49
Q

Extreme fiber stress in tension in the pre compressed tensile zone

A

ft

50
Q

specified yield strength of non prestressed reinforcement

A

fy

51
Q

Specified yield strength of transverse reinforcement

A

fyt

52
Q

Overall thickness of member

A

h

53
Q

Development length in tension of deformed bar

A

ld

54
Q

Development length in compression of deformed bar

A

ldc

55
Q

Development length in tension of deformed bar measured from outside

A

ldh

56
Q

Length measured from joint face

A

lo

57
Q

Transfer length of prestressed reinforcement

A

ltr

58
Q

Length of prestressing tendon element form any point x

A

lx

59
Q

Effect of service live load

A

L

60
Q

Development length

A

Ld

61
Q

Moment acting on anchor or anchor group

A

M

62
Q

Maximum moment in member due to service loads

A

Ma

63
Q

Cracking moment

A

Mcr

64
Q

Nominal flexural moment of section

A

Mn

65
Q

Nomial flexural strength of beam

A

Mnb

66
Q

Nomial flexural strength of column

A

Mnc

67
Q

Modular ratio of elasticity

A

n

68
Q

n

A

Es/Ec
Not less than 6

69
Q

Perimeter of centerline of outermost closed transverse torsional reinforcement

A

Ph

70
Q

Nominal axial load strength at zero eccentricity

A

Po

71
Q

Prestressing force at jacking end

A

Ppj

72
Q

Factored prestressing force at anchorage end

A

Ppu

73
Q

Prestressing force evaluated at distance from lpx jacking end

A

Ppx

74
Q

Prestressing tendon force at jacking end

A

Ps

75
Q

Unfactored axial load at the design, mid height section

A

Ps

76
Q

Factored post tensioned tendon force at anchorage device

A

Psu

77
Q

Factored axial load at given eccentricity

Factored axial force to be taken as positive for compression

A

Pu

78
Q

Prestressing tendon force at any point x

A

Px

79
Q

Spacing of shear reinforcement
Center to center spacing

A

s

80
Q

Wall thickness of hollow section

A

t

81
Q

Thickness of flange

A

tf

82
Q

Cracking torsional moment

A

Tcr

83
Q

Strength of a member or cross section required to resist factored loads

A

U

84
Q

Design shear stress

A

v

85
Q

Design shear force

A

V

86
Q

Factored shear force

A

Vu

87
Q

Shorter overall dimension of rectangular cross section

A

x

88
Q

Longer overall dimension of rectangular cross section

A

y

89
Q

Distance from centroidal axis of gross section

A

yt

90
Q

Factor for type of prestressing

A

yp or gamma p

0.55 for not less than 0.80
0.40 for not less than 0.85
0.28 for not less than 0.90

91
Q

Correction factor
Modification factor

A

Lambda

92
Q

Coefficient of friction

A

Torrent

93
Q

Ratio of non prestressed tension reinforcement

A

p
rho

94
Q

Ratio of prestressed reinforcement

A

pp
rho p

95
Q

Strength reduction factor

A

Phi

96
Q

Characteristic bond stress of adhesive anchor in cracked concrete

A

tao cr

Prestressed Concrete Design (4 decks)

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