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Flashcards in Reinforced Concrete Construction Deck (57):
1

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

Reinforced Concrete

2

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

Plain Concrete

3

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

Ferrocement

4

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

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

5

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

reinforcement

6

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

deformed bar

7

reinforcement designed to absorb tensile stresses

tension reinforcement

8

reinforcement designed to absorb compressive stresses

compression reinforcement

9

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

balanced section

10

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

over reinforced section

11

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

under reinforced section

12

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

Joseph Monier

13

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

beam

14

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

simple beam

15

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

semi-continuous beam

16

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

cantilever beam

17

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

continuous beam

18

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

t beam

19

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

reinforced concrete beam

20

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

effective depth of section

21

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

bar spacing

22

refers to the distances between posts, columns or supporting walls

span of supports

23

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

concrete cover

24

the adhesion between two substanecs, as concrete and reinforcing bar

bond

25

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

bond stress

26

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

development length

27

length of embedded reinforcement at a critical section

embedment length

28

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

end anchorage

29

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

hook

30

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

longitudinal reinforcement

31

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

percentage reinforcement

32

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

top bar

33

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

bottom bar

34

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

web reinforcement

35

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

bent bar

36

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

bend reinforcing bars

37

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

no bent bars

38

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

truss bar

39

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

stirrup

40

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

standard hook

41

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

concrete cover

42

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

reinforced concrete column

43

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

short column

44

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

long column

45

a concrete column reinforced with vertical bars and individual lateral ties

tied column

46

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

vertical reinforcement

47

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

lateral reinforcement

48

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

spiral reinforcement

49

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

bundled reinforcement

50

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

spiral column

51

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

composite column

52

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

combined column

53

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

lally column

54

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

floor system

55

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

live load

56

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

dead load

57

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

environmental load