Version | 1.3 |
Unit Name | Design of Steel and Timber Structures |
Unit Code | BCS208 |
Unit History | Previously BCS301S |
Unit Duration | 1 Semester |
Award |
Bachelor of Science (Engineering) Duration 3 years |
Year Level | Two |
Unit Creator / Reviewer | Dr Mojtaba Mahmoodian |
Core/Elective: |
Pre/Co-requisites | BCS204 |
Credit Points |
3 Total Course Credit Points 81 (27 x 3) |
Mode of Delivery | Online or on-campus. |
Unit Workload | (Total student workload including “contact hours” = 10 hours per week) Pre-recordings / Lecture – 1.5 hours Tutorial – 1.5 hours Guided labs / Group work / Assessments – 2 hours Personal Study recommended – 5 hours |
Unit Description and General Aims
The aim of this unit is to impart to students a detailed knowledge of designing steel and timber structures, including various configurations of the elements and framings, and the limit state design methodologies of steel and timber frameworks based on Australian Standards. Dead and live loads, wind loading, and design methodologies are also examined.
The subject matter covered in this unit includes: the development of Limit State Design (LSD); calculation and applications of applied structural loads based on the Australian loading codes; utilization of the structural design standards and codes of practice; the behaviour of steel and timber as materials with specific properties for design development; critical appraisal of theories behind the design methods; and the design and analysis of elements in tension, compression, bending, and combined actions based on AS4100 or equivalent for design of steel structures, and AS1720 or equivalent for design of timber structures.
At the conclusion of this unit, students will have been imparted with detailed knowledge of designing steel and timber structures, including the ability to factor in different types of loads and loading conditions.
Learning Outcomes
- Research and describe the chronological development of Limit State Design (LSD).
Bloom's Level 4 - Calculate and analyse loads applied on structures based on the Australian loading codes.
Bloom's Level 5 - Evaluate the specific properties of steel and timber and apply design development specifications.
Bloom's Level 5 - Compare and contrast the reasons for the specific design procedures.
Bloom's Level 4 - Design, analyse, and critique steel and timber elements in tension, compression, bending, and combined actions
based on AS4100 and AS1720 or equivalent.
Bloom's Level 6 - Design, analyse, and critique bolted and welded connections based on AS4100 or equivalent.
Bloom's Level 6 - Design, analyse, and critique timber connections based on AS1720 or equivalent.
Bloom's Level 6
Student assessment
Assessment Type | When assessed | Weighting (% of total unit marks) | Learning Outcomes Assessed |
Assessment 1 Type: Weekly Quizzes Topics 2 to Topic 11 |
Weekly | 10% | All |
Assessment 2 Type: Test (Invigilated) Description: Students will need to answer some short and/or long answer questions and/or solve some simple numerical problems. |
Due after Topic 5 | 20% | 3, 4, 5, 6 |
Assessment 3 Type: Practical (Report) Description: Students may complete a practical assessment based on problems to solve or practical project to demonstrate a good understanding of the fundamental concepts. |
Due after Topic 9 | 25% | 3, 4, 5, 7 |
Assessment 4 Type: Exam (Invigilated) Description: An examination with a mix of MCQs, theoretical short/detailed answer questions and engineering problems. |
Final Week | 40% | 1 to 7 |
Attendance / Tutorial Participation Description: Example: Presentation, discussion, group work, exercises, self-assessment/reflection, case study analysis, application. |
Continuous | 5% | 1 to 7 |
Overall requirements: Students must achieve a result of 50% or above in the exam itself to pass the exam, and must pass the exam to be able to pass the unit. An overall final unit score of 50% or above must be achieved to pass the unit once all assessment, including the exam, has been completed.
Prescribed and Recommended Readings
Required textbook(s):
- Trahair, N. S. and Bradford, M.A. (2017). The Behaviour and Design of Steel Structures to AS4100, 3rd Edition, Taylor & Francis
- SA HB 108-2013 Timber Design Handbook. Geoffrey N. Boughton; Keith I. Crews. 2013. Timber design handbook: in accordance with the Australian Limit State Timber Design Code AS 1720.1-2010
Reference Materials:
- OneSteel (BHP) Hot Rolled & Structural Steel Products Brochure, download relevant parts through this link
- Australian Standard (2020), AS4100, Steel Structures (latest edition)
- Australian Standard (2002), AS1170.1, Structural Design Actions – Permanent, Imposed and Other Actions (latest edition)
- Australian Standard (2011), AS1170.2, Structural Design Actions - Wind Actions (latest edition)
- Australian Standard (2010), AS 1720.1-2010, Timber structures - Design methods (latest edition)
- Australian Standard (2006), AS 1720.2-2006: Timber structures - Timber properties (latest edition)
- Kirke, B. and Al-Jamel, H. I. (2004). Steel Structures Design Manual to AS4100, 1st Edition
Unit Content
Topic 1
The Structural Design Process - An Introduction
- Method of Structural Analysis
- Introduction to Structural Analysis
- Loading Principles (DL, LL, …)
- Methods of Determining Action Effects
- Forms of Construction Assumed for Structural Analysis
- Assumption for Analysis
- Elastic Analysis
- Moment Amplification
- Moment Distribution
- Frame Analysis Software
- Finite Element Analysis
- Plastic Analysis
- Member Buckling Analysis
- Frame Buckling Analysis
- Principles of Structural Design
Topic 2
General Design Requirements
- Classification of Loads on Structures
- Loads and Other Actions on Structures
- Limit State Design
- Strength and Stability Limit state
- Strength and Serviceability Limit State
- Estimating Dead Loads
- Estimating Live Loads
- Estimation of Wind Loads, Snow Loads and Earthquake Loads
- Dynamic Loads and Resonances
- Load Combinations
- Applications
- Strength Design Load Combinations
- Serviceability Design Load Combinations
Topic 3
Behaviour and Properties of Structural Members
- Structural Members in Tension
- Introduction to Tension Members
- Behaviour of Tension Members
- Structural Members in Compression
- Introduction to Compression Members
- Behaviour of Compression Members
- Structural Members in Bending (Flextural Members)
- Beam Terminology
- Compact, Non-Compact and Slender-Element Sections
- Lateral Torsional Buckling
- Lateral Torsional Buckling Design Methodology
- Section Classification
- Section Capacity
Topic 4
Steel Structural Properties
- Introduction to Properties of Steel
- Material Behaviour
- Strength, Stiffness and Density
- Yield Stress and Tensile Strength Used in Design
- Ductility, Stress Effects, Metallurgy and Temperature Effects
- Consistency
- Corrosion
- Fatigue Strength
- Fire Resistance
Topic 5
Design of Steel Members in Tension and Compression
- Design of Steel Members in Tension
- Design of Tension Members to AS 4100
- Concentrically Loaded Tension Members
- Eccentrically and Locally Connected Members
- Bending of Tension Members
- Stress Concentrations
- Summary of Tension Members
- Worked Examples
- Truss Member in Tension
- Compound Tension Member with Staggered Holes
- Designing a Single Acting Bracing
- Designing Steel Wire Rope Tie
- Design of Steel Members in Compression
- Design of Compression Members to AS 4100
- Effective Lengths of Compression Members
- Elastic Compression Members
- Inelastic Compression Members
- Design of Compression Members
- Strength of Compressions Members
- Strength Curves
- Restrained Compression Members
- Compression Members Back to Back
- Torsional and Torsional-Flexure Buckling
- Design Strength of Column-Section Capacity and Member Capacity
Topic 6
Design of Other Steel Members
- Design of Steel Members in Bending (Flextural Members)
- Design of Flexural Members to AS 4100
- Lateral Buckling Behaviour of Unbraced Beams, Critical Flange
- Fully, Partially and Laterally Restrained Cross-Section
- Segments, Sub-Segments and Effective Length
- Member Moment Capacity of a Segment
- Design for Shear Force and Bending
- Design of Steel Members for Combined Actions
- Plastic Analysis and Plastic Design
- Design of Combined Bending and Axial Compression
- Design of Combined Bending and Axial Tension
- Design for Buckling of Thin-plate Elements
- Plate Elements in Compression
- Plate Elements in Shear
- Plate Elements in Bending
Topic 7
Timber Structural Properties
- Introduction to Properties of Timber
- Material Behaviour
- Strength, Stiffness and Density
- Tensile Strength Used in Design
- Durability
- Fatigue Strength
- Fire Resistance
Topic 8
Design of Timber Members in Tension and Compression
- Design of Timber Members in Tension
- Design of Tension Members to AS 1720
- Concentrically Loaded Tension Members
- Eccentrically and Locally Connected Members
- Bending of Tension Members
- Summary of Tension Members
- Worked Example: Truss Member in Tension
- Design of Timber Members in Compression
- Design of Compression Members to AS 1720
- Effective Lengths of Compression Members
- Design of Timber Compression Members
- Strength of Compressions Members
- Strength Curves
- Torsional and Torsional-Flexure Buckling
- Design Strength of Column-Section Capacity and Member Capacity
Topic 9
Design of Other Timber Members
- Design of Timber Members in Bending (Flexural Members)
- Design of Flexural Members to AS 1720
- Lateral Buckling Behaviour of Unbraced Beams
- Segments, Sub-segments and Effective Length
- Member Moment Capacity of a Segment
- Design for Shear Force and Bending
- Design of Timber Members for Combined Actions
- Design of Combined bending and Axial Compression
- Design of Combined bending and Axial Tension
Topic 10
Design of Steel Connections (Joints)
- Introduction to Joint Components
- Arrangement of Joints
- Behaviour of Joints
- Common Joints
- Design of Bolts
- Design of Bolted Plates
- Design of Welds and Welded Joints
- Beam and Column Splices
- Elastic Analysis of Joints
Topic 11
Timber Connections, Timber Beam-Columns, and Timber Frames
- Timber Connections
- Common Timber Connections
- Behaviour of Connections
- Beam and Column Splices
- Timber Beam-Columns
- In-plane Behaviour of Isolated Beam-Columns
- Flexural-Torsional Buckling of Isolated Beam-Columns
- Bi-axial bending of Isolated Beam-Columns
- Timber Frames
- Triangulated Frames
- Two-Dimensional Flexural Frames
- Three-Dimensional Flexural Frames
Topic 12
Steel Beam-Columns and Steel Frames
- Steel Beam-Columns
- In-plane Behaviour of Isolated Beam-Columns
- Flexural-Torsional Buckling of Isolated Beam-Columns
- Bi-axial Bending of Isolated Beam-Columns
- Steel Frames
- Triangulated Frames
- Two-Dimensional Flexural Frames
- Three-Dimensional Flexural Frames
Unit Review
In the final week, students will have an opportunity to review the contents covered so far. Opportunity will be provided for a review of students’ work and to clarify any outstanding issues.
Software/Hardware Used
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