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FOUNDATION LEC > Foundation Engineering PDF > Flashcards

Foundation Engineering PDF Flashcards

1
Q

A footing carrying single column

A

Spread footing

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2
Q

Its function is to “spread” the column load laterally to the soil so that the stress intensity is reduced to a value that the soil can safely carry.

A

Spread footing

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3
Q

Can be classified as wall and column footing.

A

Spread footing

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4
Q

Simply a strip of reinforced concrete, wider that the wall, that distributes its pressure.

A

Wall footing

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5
Q

Usually square, sometimes rectangular, and represents the simplest and most economical type.

A

Single column footing

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6
Q

Design Procedures:

A

A. Proportioning of footing
B. Structural design of footing

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7
Q

Concrete cover minimum for foundation

A

75mm

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8
Q

Concrete cover minimum for beams

A

40mm

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9
Q

Nilalagay para lumutang yung mga bakal sa footing

A

Spacer block

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10
Q

Surcharge

A

q

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11
Q

Allowable soil pressure or allowable bearing capacity

A

qa

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12
Q

Depth of soil

A

Ds

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13
Q

Depth of footing

A

Df

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14
Q

Thickness of concrete

A

Dc

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15
Q

It is obtained by using the services of geotechnical engineer. Will determine safe values from the principles of soil mechanics based on test borings, load tests, and other experimental investigations.

A

Allowable soil pressure, qa

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16
Q

Where allowable stress or allowable strength design is used.

A

Basic load combinations

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17
Q

When using these, a one third increase shall be permitted in allowable stresses for all combinations, including W or E

A

Alternate Basic Load Combinations

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18
Q

Load due to fluids with well - defined pressures and maximum heights

A

F

19
Q

Load due to lateral pressure of soil and water in soil

A

H

20
Q

Roof live load, including any permitted live load reduction

A

Lr

21
Q

Rain load on the undeflected roof

A

R

22
Q

Self - straining force and effects arising from contraction or expansion resulting from temperature change, shrinkage, moisture change, creep in component materials, movement due to differential settlement, or combination thereof

A

T

23
Q

Load due to wind pressure

A

W

24
Q

Ratio of long side to short side of concentrated load or reaction area

A

B

25
Q

Perimeter of critical section

A

bo

26
Q

Critical area

A

Ao

27
Q

Nominal shear strength

A

Vn

28
Q

Effective depth

A

d

29
Q

The total effective depth of bottom reinforcement is at least ____.

A

150mm

30
Q

Reinforcement shall be distributed uniformly across the entire width of footings

A

One way footings

31
Q

In square, reinforcement shall be distributed uniformly across entire width of footing in both directions.

A

Two way footings

32
Q

Minimum area of flexural reinforcement

A

As min

33
Q

Shall be provided at every section where tension reinforcement is required by analysis

A

As min

34
Q

Minimum steel ratio

A

P min

35
Q

Clear spacing

A

Sc

36
Q

For parallel non prestressed reinforcement in a horizontal layer, _______ shall be at least the greatest of 25mm, db and 4/3 MSA

A

Clear spacing

37
Q

Shall not be spaced farther apart than three times the wall or slab thickness, 3Dc, nor farther than 450mm

A

Primary flexural reinforcement

38
Q

If ld min > ld available

A

Provide standard hooks

39
Q

All forces acting at the base of a column shall be transferred into the footing by ____________ and by _________, ___________, and _________.

A

Bearing on concrete
Reinforcement, dowels, and mechanical connectors

40
Q

Bearing strength of concrete

A

fc

41
Q

Column area or the loaded area

A

A1

42
Q

Supporting area

A

A2

43
Q

Development length

A

Ldc

FOUNDATION LEC (4 decks)

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