Fundamentals of Building Construction
6th Edition
ISBN: 9781118138915
Author: Edward Allen
Publisher: WILEY
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Chapter 2, Problem 3RQ
To determine
Explain the dissimilarity between a cohesive and a cohesionless soil with one example.
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Consider the cross-section shown below. Assume the cross-section is subjected to an external axial
force of 300 kN applied at the origin of the reference system shown (the origin is located at mid-height
of the section). Note that the flanges have different thicknesses.
Assume linear-elastic material properties and the section to be made of steel with elastic modulus
E = 200 GPa.
110
4y
14
70
10
X
96
70
30
110
Notes: All dimensions in mm
Sketch not to scale
(i) Determine the strains and stresses induced in the cross-section by applying the cross-sectional
analysis presented in the lecture notes. Provide all steps of your numerical calculations.
(ii) Sketch the strain and stresses diagram based on the values calculated at point (i).
Consider the building floor layouts illustrated below. These are referred to as Floor Layout A and Floor
Layout B. Assume the floor to be built with composite steel-concrete construction (i.e. it is a composite
steel-concrete floor).
concrete core
typical column
Floor Layout A
concrete core
perimeter of the
building floor
perimeter of the
building floor
Floor Layout B
(i) Provide two qualitative floor layouts for the primary and secondary beams for the Floor Layout A
(Floor Layout A is shown above). Make sure to clearly draw the 2 floor layouts highlighting primary
and secondary beams. Comment on the advantages and disadvantages of the two floor layouts with
respect to one another.
(ii) Consider Floor Layout B (Floor Layout B is shown above) and sketch one qualitative floor layout in
which you provide qualitative locations of the columns, primary beams and secondary beams.
Comment on the benefits of your selection of the positions of the beams and columns.
Feel free to introduce any…
Consider the two composite columns shown below and denoted as columns 1 and 2. These columns
have same gross area but differ in the geometries of the steel and concrete components. In particular,
the square steel hollow section in section A-A (for column 1) has thickness of t, while the square steel
hollow section in section B-B (for column 2) has thickness of 2t.
a
t
t
Column 1
steel
steel
concrete
concrete
B
B
Column 2
2t
2t
2t
2t
a
a
Section A-A
(for column 1)
a
Section B-B
(for column 2)
Assume that these columns are subjected to the same sustained load Po applied at time to and
maintained constant afterwards (see time axis below).
РА
Ро
0
time
Provide a qualitative description of the variation over time due to creep effects (do not consider
shrinkage effects in this question) of the following variables for each of the two columns considered
(i.e. columns 1 and 2):
1) deformations in the concrete
2) deformations in the steel
3) stresses in the concrete
4) stresses in the steel
For…
Chapter 2 Solutions
Fundamentals of Building Construction
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