CIV3506: CONCRETE STRUCTURES Semester 1, 2021
CIV 3506 – Concrete Structures
Semester 1, 2021
Assignment 1
Due date: 01 April 2021
Weighting: 20% (200 marks out of 1000)
Aim
The aim of this assignment is to allow you to demonstrate your ability to apply the theory developed in
Topics 1 to 6, and particularly the design of reinforced concrete beams following the provisions in AS3600-
2018.
Important notes
It is important that you go through all lectures, tutorials, and formative quizzes relating to the design of
einforced concrete beams. Students found these tools to be very effective in answering the Assignment. You
will receive up to 10 marks by providing evidence of completing these learning tools.
Topic Marks Date completed
1. Reinforced concrete: An overview 1.5
2. Method of analysis and design 1.5
3. Beams - Singly reinforced section 1.5
4. Beams - Doubly reinforced sections, flanged sections 1.5
5. Beams - Shear 1.5
6. Beams - Deflection and Detailing 1.5
Guest lecture – Steel Reinforcement Institute of Australia 1.0
You need to submit your assignment electronically through the Assignment submission box in the StudyDesk.
Make sure that you attach your signed Assignment coversheet as submitted assignment without a coversheet
will not be marked. The file name of the submitted assignment should be: SN_Assign1_###.doc or
SN_Assign1_###.pdf, where SN is your serial number and ### co
esponds to your Family name.
Students can get their serial number (SN) from USQ StudyDesk.
You need to submit the assignment according to the following parameters co
esponding to your SN. Design
using inco
ect parameters will result in a deduction of up to 20% of the total marks.
A = Remainder of (Serial Numbe
2)
B = Remainder of (Serial Numbe
3)
C = Remainder of (Serial Numbe
4)
D = Remainder of (Serial Numbe
5)
E = Remainder of (Serial Numbe
6)
Parameters
Remainder
XXXXXXXXXX
A Location Tamworth Cairns -- -- -- --
B Concrete Strength, f’c (MPa XXXXXXXXXX -- -- --
C
Superimposed dead load on
the slab (kPa)
XXXXXXXXXX -- --
C
Superimposed live load on
the slab (kPa)
XXXXXXXXXX -- --
CIV3506: CONCRETE STRUCTURES Semester 1, 2021
D
Length of beams (centre-to-
centre), L1 (mm)
XXXXXXXXXX8400 --
D
Length of beams (centre-to-
centre), L2 (mm)
XXXXXXXXXX7200 --
E
Spacing of beams (centre-to-
centre), L3 (mm)
XXXXXXXXXX XXXXXXXXXX
Task No.1 Analysis and Design of Beam (Worth 190 marks)
A 2-storey commercial building is to be constructed in a non-industrial area and in location listed in
Parameter A. A concrete compressive strength, f’c specified in Parameter B and where standard formwork and
compaction are to be used. The general lay-out of the building and the beam is shown in Figure 1a. In
addition to its self-weight, the beam is subject to uniform superimposed dead and live loads on the slab strip
given in Parameter C. The 2-span continuous beams are supported by 400 mm x 400 mm columns as shown
in Figure 1b. The spans of the beam have lengths of L1 and L2, respectively (Parameter D) which are
measured from centre-to-centre of columns. A 150 mm thick slab is cast monolithically with stiff beams
which are spaced L3 from centre-to-centre of beams (Parameter E) as shown in Figure 1c. You are asked to
design the exterior beam (refer to Figure 1c shaded area). The density of reinforced concrete can be taken as
2400 kg/m3.
(i) Determine the minimum beam dimensions (b and D in the nearest 25 mm) that can safely ca
y its
self-weight, and the superimposed dead and live load as well as can comply with the strength and
serviceability requirements. Also, determine the minimum required concrete cover to satisfy the
durability requirements and fire resistance period of 90 minutes. "Note that you will need to assume
starting dimensions first to allow you to calculate the design loads and the initial bending moment
and shear forces to design the beam in (ii). This may not be your final dimensions and will likely
change as your design progresses. Report your final dimensions of the beam that comply
equirements (iii) to (vi)."
XXXXXXXXXXmarks)
(ii) Determine the design bending moments and transverse shear forces using the simplified method in
AS3600 (verify and show that the simplified method can be applied for this beam). Draw the bending
moment and shear diagram complete with units.
(25 marks)
(iii) Design the necessary flexural reinforcement required for positive and negative bending along the
length of the beam. Ensure that the minimum strength requirements are satisfied.
(50 marks)
(iv) Design the necessary shear reinforcement along the length of the beam.
(30 marks)
(v) Draw the reinforcement detailing of the beam (including both flexure and shear), with appropriate
sections.
(30 marks)
(vi) Determine the total long-term deflection and the incremental deflection of the beam in the end and
interior spans. You may assume s = 0.7 and l = 0.4. Check whether these deflections are within the
limit specified in AS3600. If they are not within the limits, suggest on ways on how this design
equirement can be satisfied.
(30 marks)
CIV3506: CONCRETE STRUCTURES Semester 1, 2021
L1
400 x 400 mm
square columns
L2
The beam to
e designed
D
L3 L3
Slab thickness = 150 mm
(a) General layout of the RC slab supported on beams and columns
(b) 2-span continuous beam supported by 400 x 400 mm square columns (Y-Y)
(c) Sectional view along X-X of the beams showing the 150 mm thick slab
Figure 1. Analysis and design of beams
The continuous beam
to be designed
L3
L3
L2 L1
X
X
Y Y