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l01 Introduction Kaea3218
Citation preview
9/22/2014
1
Dr. Meldi SuhatrilDepartment of Civil Engineering,
Faculty of Engineering, University of Malaya.
STRUCTURAL STEEL DESIGN (KAEA 3218)
- Introduction-
Steel Structures can be divided into 3 categories:
Framed structures-E.g. Multistory buildingsConsists of beams and columns, either rigidly or with simple connection, With diagonal bracing to provide stability- E.g.Industrial buildingLong span truss, lattice girder, Column-free structure- E.g.BridgesBeams and plate girder or trusses
Introduction
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptibility
- Quality
• Structural Element
Shell-type structures- E.g.water tank, storage bins
Suspension-type structuresTension cables are major supporting elementsE.g. suspension bridge
Introduction
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptibility
- Quality
• Structural Element
1. Speed of execution
Advantages of Steel
Metal decking ready to be laid by hand
Edge trims are available to level concrete and prevent over-run
The shear studs which provide the
key between beam, deck and concrete can be
placed by a single operative at 1000
per day
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptibility
- Quality
• Structural Element
9/22/2014
2
1. Speed of execution
Advantages of Steel
Concrete being placed by pumping Services are easily fixed to the underside of the decking
Prefabricated stairs can be transported by crane and placed in position to give rapid and safe access for construction workers
Cladding units -pre-cast granite faced or curtain walling -can be lifted straight from the lorry and into position to avoid site storage
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptibility
- Quality
• Structural Element
2. Lightness, Stiffness & Strength
Advantages of Steel
Steel structures are generally lighter than other materials. In almost all casesthis lower weight leads to lower costs for foundations particularly for siteswith poor ground.
Smaller columns increase effective floor utilisation and, where longer spansare required, the cost savings between steel and other forms of constructionincrease considerably. For large column grids in buildings, steel is the onlyfeasible solution.
Long span floor systems for office building
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
3. Adaptability of Usage of Steel Frames for Refurbishment
Advantages of Steel
Structural steel provides maximum adaptability forchanges in building use, because structural alterationscan be accommodated with relative ease. Whereadditional members are required, connections can bemade to the existing frame with minimumdisturbance and cost.
4. Quality
A steel frame is a factory made, precise product,produced by a stable, well-trained workforce.
Only the erection of pre-fabricated members is leftfor the site - a process which is easily controlled.
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
• Beams and girders – members carrying lateral loads in bending and shear
• Ties – members carrying axial loads in tension• Struts, column and stanchions – members carrying axial loads in
compressions. These members are often subjected to bending as well as compression
• Trusses and lattice girders – framed members varying lateral loads. These a re composed of struts and ties
• Purlins – beam members carrying roof sheeting• Sheeting rails – bema members supporting wall cladding• Bracing – diagonal struts and ties that, with columns and roof
trusses, form vertical and horizontal trusses to resist wind loads and stabilize the building
• Joints connect members together such as the joints in trusses, beam-to-beam joints and beam-to-column joints.
• Bases transmit the loads from the columns to the foundations.
9/22/2014
3
1. Multi-storey frame1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
2.Truss & lattice girder1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
2.Truss & lattice girder1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
3. Connection1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
9/22/2014
4
3. Connection1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
3. Connection1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
3. Connection1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements
3. Connection1.0. INTRODUCTION
• Tyoe of Steel Structures
- Frame
- Shell
- Suspension
• Advantages
- Speed of Execusion
- Lightness & Strength
- Adaptability
- Quality
• Structural Element
Structural Elements