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BT 3 > Reinforced Concrete Construction > Flashcards

Reinforced Concrete Construction Flashcards

1
Q

concrete in which steel reinforcement is embedded in such a manner that the two materials act together in resisting forces. Also called Beton arme, Ferroconcrete

A

Reinforced Concrete

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2
Q

Concrete having no reinforcement or reinforced only for drying shrinkage or thermal stresses

A

Plain Concrete

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3
Q

Constructed of cement-sand mortar over wire mesh that has been preshaped over a mold

A

Ferrocement

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4
Q

Concrete which is deposited in the place where it is required to harden as part of the structure, as opposed to precast concrete

A

cast-in-place concrete, cast in-situ, in-situ concrete

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5
Q

a system of steel bars, strands or wires for absorbing tensile, shearing and sometimes compressive stresses in a concrete member or structure

A

reinforcement

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6
Q

A reinforcing bar hot-rolled with surface deformations to develop a greater bond with concrete

A

deformed bar

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7
Q

reinforcement designed to absorb tensile stresses

A

tension reinforcement

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8
Q

reinforcement designed to absorb compressive stresses

A

compression reinforcement

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9
Q

a concrete section in which the tension reinforcement theoretically reaches its specified yield strength as the concrete in compression reaches its assumed ultimate strain. a design so proportional such that the maximum stresses in the concrete and steel are reach simultaneously so that they fail together

A

balanced section

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10
Q

a concrete section in which the concrete in compression reaches its assumed ultimate strain before the tension reinforcement reaches its specified yield strength. this is a dangerous condition since failure of the section could occur instantaneously without warning. this type of design is not advisable because concrete fails abruptly in compression

A

over reinforced section

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11
Q

a concrete section in which the concrete in compression reaches its specified yield strength before the concrete in compression reaches its assumed ultimate strain. this is a desirable condition since failure of the section would be preceded by large deformations, giving prior warning of impending collapse. in this particular type of design, the steel fails fails first while the concrete has not yet reached its allowable values but the failure is gradual with steel yielding

A

under reinforced section

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12
Q

In 1867, he used the concept iron reinforcing bars when he reinforced William Ward’s flower pots using wire.

A

Joseph Monier

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13
Q

a rigid structural member designed to carry and transfer transverse loads across space to supporting elements

A

beam

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14
Q

refers to a beam having a single span supported at its end without a restaint at the support

A

simple beam

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15
Q

refers to a beam with two spans with or without restraint at the two exteme ends

A

semi-continuous beam

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16
Q

a beam supported on one end and the other end projecting beyond the support, beam or wall

A

cantilever beam

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17
Q

a term applied to a beam that rests on more than two supports

A

continuous beam

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18
Q

part of the floor and beam unit when poured simultaneously thereby producing a monolithic structure where the portion of the slab at both sides of the beam serves as flanges of such beam

A

t beam

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19
Q

a concrete beam designed to act together with longitudinal and web reinforcement in resisting applied forces, formed and placed along with the slab it supports

A

reinforced concrete beam

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20
Q

the depth of a concrete section measured from the compression face to the centroid of hte rension reinforcement

A

effective depth of section

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21
Q

the center-to-center spacing of parallel bars, the resulting clear distance between the bars being regulated by bar diameter, maximum size of coarse aggregate, andthickness of the concrete section

A

bar spacing

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22
Q

refers to the distances between posts, columns or supporting walls

A

span of supports

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23
Q

the amount of concrete required to protect steel reinforcement from fire and corrosion, measured frm the surface of the reinfocement to the outer surface of the concrete section

A

concrete cover

24
Q

the adhesion between two substanecs, as concrete and reinforcing bar

A

bond

25
Q

the adhesive force per unit area of contact between a reinforcing bar and the surrounding conrete developed at any section of a flexural member

A

bond stress

26
Q

the length of embedded reinforcement required to develop the design strength of reinforcement at a critical section

A

development length

27
Q

length of embedded reinforcement at a critical section

A

embedment length

28
Q

length of reinforcement mechanical anchor or hook or combination thereof beyond point of zero stress in reinforcement

A

end anchorage

29
Q

a bend or curve given to the end of a tension bar to develop an equivalent embedment length, used where there is insufficient room to develop an embedment length

A

hook

30
Q

reinforcement essentially parallel to the horizontal surface of a slab or to the long axis of a concrete beam or column

A

longitudinal reinforcement

31
Q

the ratio of effective area of reinforcement to effective area of concrete at any section of a reinforced concrete member, expressed as a percentage

A

percentage reinforcement

32
Q

any of the longitudinal bars serving as tension reinforcement in the section of a concrete beam or slab subject to a negative moment

A

top bar

33
Q

any of the longitudinal bars serving as tension reinforcement in the section of a concrete beam or slab subject to positive moment

A

bottom bar

34
Q

reinforcement consisting of bent bars or stirrups, placed in a concrete beam to resist diagonal tension

A

web reinforcement

35
Q

a longitudinal bar bent to an angle of 30° or more with the axis of the concrete beam, perpendicular to and intersecting the cracking that could occur from diagonal tension

A

bent bar

36
Q

reinforcing bars that are bent up on or near the inflection point and are extended at the top of the beam across the support towards the adjacent span

A

bend reinforcing bars

37
Q

bars that are not bent, an additional straight reinforcing bars placed on the top of the beam across the supports to the required length and other stright additional bars are also placed at the bottom benterr of the beam span where positive moment develops

A

no bent bars

38
Q

a longitudinal bar bent up or down at pooints of moment reversal in a reinforced concrete beam

A

truss bar

39
Q

any of the u-shaped or closed-loop bars placed perpendicular to the longitudinal reinforcement of a concrete beam to resist the vertical component of diagonal tension

A

stirrup

40
Q

a 90°, 135° or 180° bend made at the end of a reinforcing bar according to industry standards with radius based on the bar diameter

A

standard hook

41
Q

the amount of concrete required to protect steel reinforcement from fire and corrosion, measured from the surface of the reinforcement to the outer surface of the concrete section

A

concrete cover

42
Q

a concrete designed to act together with vertical and lateral reinforcement in resisting applied forces

A

reinforced concrete column

43
Q

a column having an unsupported height not greater than 10 times the shortest lateral dimension of the cross section

A

short column

44
Q

when the unsupported height is more than 10 times the shortest lateral dimension of the cross section

A

long column

45
Q

a concrete column reinforced with vertical bars and individual lateral ties

A

tied column

46
Q

longitudinal reinforcement placed in concrete column to absorb compressive stresses, resist bending stresses and reduce the effects of creep and shrinkage in the column

A

vertical reinforcement

47
Q

spiral reinforcement or lateral ties placed in a concrete column o laterally restrain the vertical reinforcement and prevent buckling

A

lateral reinforcement

48
Q

lateral reinforcement consisting of an evenly spaced continuous spiral held firmly in place by vertical spacers

A

spiral reinforcement

49
Q

reinforcement employed consisting of two to four bars tied in direct contact with each other to serve or act as one unit reinforcement placed at the corner of lateral ties

A

bundled reinforcement

50
Q

a concrete column with spiral reinforcement enclosing a circular core reinforced with vertical bars

A

spiral column

51
Q

a type of column here structural steel is embedded into concrete core of a spiral column

A

composite column

52
Q

a column with a structural steel encased in a concrete of at least 7cm thick reinforced with wire mesh surrounding the column at a distance of 3cm inside the outer surface of the concrete covering

A

combined column

53
Q

a fabricated post made of steel provided with a plain flat steel bar or plate which holds girder, girt or beam

A

lally column

54
Q

the horizontal planes that supports both live loads and dead loads and transfer their loads horizontally across to a beam, column or to load-bearing walls

A

floor system

55
Q

refers to those movable loads imposed on the floor such as people, furniture and the like

A

live load

56
Q

refers to the static load such as the weight of the construction materials which generally carry the live load

A

dead load

57
Q

consist of wind pressure and suction, earthquake load, rainwater on flat roof and forces caused by temperature changes or differentials

A

environmental load

BT 3 (9 decks)

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