There are typically circular, although square or polygonal shapes are sometimes used.
They are designed to restrain the lateral expansion of the column by enclosing its
core with one and a half turns of a spiral, extending from the lower part of the column
to the upper portion.
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Spiral column
,It is the last criterion to be considered in designing reinforced concrete. The structure
must also be evaluated based on the principle underlying its aesthetical or
practicality aspect.
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Practicability or Aesthetic
What is the strength reduction factor for axial compression and axial compression
with flexure?
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1. Spiral - 0.75
2. Tied - 0.65
What are the modes of failure in footing?
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1. Soil bearing
2. Bending
3. One-way shear
4. Two-way shear (Punching shear)
What is the ultimate resisting moment of concrete considering the tension area? Also,
draw the derivation of the formula.
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Mu(r) = φT(d-a/2) = φAsfy(d-a/2)
This diagram plots the axial load capacity and moment strength capacity of the
column making it easier to analyze.
Give this one a try later!
Column interaction diagram
It is designed to support multiple columns that are close to each other and have
individual footings that would overlap if constructed separately. This type of footing is
used when the columns are so close that it is more practical and economical to
combine their footings into a single and larger footing that can distribute the loads
effectively to the soil.
Give this one a try later!
Combined footing
There are formed using some sort of bulkhead made of wood, steel, plastic, or
precast concrete.
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Construction joint
, The eccentrically loaded column experiences two bending moment effects which are
___ and ___.
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1. Uniaxial bending moment
2. Biaxial bending moment
What is the strength reduction factor for flexure without axial?
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0.9
What are the structures that are treated as two way slabs?
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1. Slabs supported on four sides
2. Beam and slab systems
3. Flat slabs
4. Flat plates
It is the distance from neutral axis to outermost compression fiber.
Give this one a try later!
They are designed to restrain the lateral expansion of the column by enclosing its
core with one and a half turns of a spiral, extending from the lower part of the column
to the upper portion.
Give this one a try later!
Spiral column
,It is the last criterion to be considered in designing reinforced concrete. The structure
must also be evaluated based on the principle underlying its aesthetical or
practicality aspect.
Give this one a try later!
Practicability or Aesthetic
What is the strength reduction factor for axial compression and axial compression
with flexure?
Give this one a try later!
1. Spiral - 0.75
2. Tied - 0.65
What are the modes of failure in footing?
Give this one a try later!
1. Soil bearing
2. Bending
3. One-way shear
4. Two-way shear (Punching shear)
What is the ultimate resisting moment of concrete considering the tension area? Also,
draw the derivation of the formula.
,Give this one a try later!
Mu(r) = φT(d-a/2) = φAsfy(d-a/2)
This diagram plots the axial load capacity and moment strength capacity of the
column making it easier to analyze.
Give this one a try later!
Column interaction diagram
It is designed to support multiple columns that are close to each other and have
individual footings that would overlap if constructed separately. This type of footing is
used when the columns are so close that it is more practical and economical to
combine their footings into a single and larger footing that can distribute the loads
effectively to the soil.
Give this one a try later!
Combined footing
There are formed using some sort of bulkhead made of wood, steel, plastic, or
precast concrete.
Give this one a try later!
Construction joint
, The eccentrically loaded column experiences two bending moment effects which are
___ and ___.
Give this one a try later!
1. Uniaxial bending moment
2. Biaxial bending moment
What is the strength reduction factor for flexure without axial?
Give this one a try later!
0.9
What are the structures that are treated as two way slabs?
Give this one a try later!
1. Slabs supported on four sides
2. Beam and slab systems
3. Flat slabs
4. Flat plates
It is the distance from neutral axis to outermost compression fiber.
Give this one a try later!
