Structural Steel Design Chapter 1 -
Introduction to Steel Design
n steel structures, structural steel is the main ... - ---ASNWERS---Load carrying material to transfer the
load within them and to transfer load to the ground
List 2 common steel structures - ---ASNWERS---1. Roof trusses
2. Crane girders, columns, beams
3. Plate girders, bridges
4. Transmission towers
3 Advantages of structural steel - ---ASNWERS---1. High compressive & tensile strength per unit weight
2. Low construction weight
3. Good aesthetic view
4. Good quality and durability
5. Very high speed of construction
6. Reusability and scrap value
7. Better solution to cover large span and tall structures
2 Disadvantages of structural steel - ---ASNWERS---1. High initial cost
3. Corrosion
3. Low fire resistance
, The 2 main steps to steel making - ---ASNWERS---1. Iron is extracted from iron ores like
haematite, limestone, magnetite in furnace
2. Oxygen is passed through molten iron to remove carbon and impurities to make steel
Adding chrome, nickel, phosphorous can impart .... - ---ASNWERS---Special properties in steel
Semi finished products from the steel making machine are hot rolled to ... - ---ASNWERS---Make different
sections like bars,
plates, angles, sections
Adding carbon to steel ... - ---ASNWERS---Increases the tensile strength
and hardness but lowers ductility and toughness
In construction structural steel with up to 0.1% carbon is used to ... - ---ASNWERS---Have ductility and
yield
2 Physical properties of steel listed in Eurocode 3 - ---ASNWERS---1. Density (7850 kg/m^3)
2. Young's modulus (210000 N/mm^2)
3. Poisson ratio (0.3)
Ductility definition - ---ASNWERS---Ability of material to change its shape without fracture
Mild steel has .. ductility - ---ASNWERS---High
High carbon steel has .. ductility - ---ASNWERS---Low
Toughness definition - ---ASNWERS---Ability of material to resist (absorb) impact load
Brittle fracture definition - ---ASNWERS---At low temperature the steel fails on impact loading due to
reduction in ductility and toughness
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