Design of Concrete Structures
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Design Assignment
EGB375 Design of Concrete Structures
Assessment
Unit Learning
Outcomes Assessed
ULO1 Determine the bending and shear capacities of reinforced concrete members
ULO2 Assess whether reinforced concrete beams satisfy the ultimate and serviceability
limit states as per AS3600 (ultimate capacity, crack width, cracks spacing, deflection).
ULO3 Assess risks to safety in design
ULO4 Write well laid out design reports
Task Weight (%) 30
Due Date 11:59PM on 27 May 2022
Nature of Submission Individual Scanned Copy (Neatly Handwritten) or Typed submitted via. Turnitin
Overview
The following scenario is formulated to provide you a chance to apply the theories introduced in the concrete
structures subject to design a simple structural element and develop an appreciation of overall structural design
process.
Scenario
A two-storey house in Sunshine Coast, QLD has been planned to have a terrace over garage which is supported on
a concrete beam and two columns at front of the garage as shown in Figure 1. The principal engineer has
proposed to use 32MPa concrete (unit weight 25kN/m3) for this building. You are required to analyse and design
RC Beam carrying the load of terrace of this building by solving Tasks 1 to 21. Include references from Australian
Concrete Standards (AS3600-2018) where possible. The required design data is given below.
• Proposed beam size: b = 250mm, D = 400mm
• Clear span of the beam = 5.75m
• Proposed column cross-section = 250mm × 250mm
• Uniform permanent dead load of terrace slab onto the beam = 6/
• Uniform permanent dead load of terrace fall, and flooring onto the beam = 3/
• Uniform permanent dead load of safety railing onto the beam = 1/
• Uniform imposed live load onto the beam = 2.5/
• Clear cover to reinforcement = 30mm
RC Beam
Columns
Clear Span
Design Assignment | EGB375 | Page 2 of 6
What you will do
In the conduct of your design assignment, you will be required to complete the following Tasks 1 to 21:
1. Draw the beam elevation schematically supported on columns with span length and the loading on top.
2. Determine the self-weight of the beam in /
3. Determine the magnitude of the ultimate design load w*
4. Determine the design bending moment M*
5. Determine the short-term bending moment ∗
6. Determine the long-term bending moment ∗
7. Determine the area of steel required for the calculated M*
(TIP: Find considering singly reinforced beam using ∅ = ∗. If this steel area does not satisfy the
ductility requirements of AS3600, design a doubly reinforced beam keeping the same and provide
compression reinforcement for which the ductility and moment demand are satisfied)
8. Determine the gross second moment of area of the cross-section
9. Determine the cracking moment ,
10. Determine the cracked second moment of area of the cross-section and comment whether it is needed for
the serviceability design.