Introduction of steel:
Ø Steel is an Alloy
of Iron & Carbon. The Standard Structural Steel Contains:
Iron
(Fe): 99%
Carbon
(C): 0.2% to 0.35%
Manganese
(Mn): 0.25% to 0.35%
Aluminium
(Al): 0.2% to 0.25%
Sulphur
(S): 0.055%
Phosphorus(P):
0.055%.
Ø Steel structure is an assembly of group of members or
elements expected to sustain their Share of applied forces.
Ø The design of steel structures involves:
1) Functional Design
2) Structural Design
1) Functional Design:
Ø The planning
of structure for specific purposes such as ventilation, lighting aesthetic view
etc.
2) Structural Design:
Ø It consists of
proportioning of various elements of a building in the most economical manner
so that the Loads acting on it are transferred safely to the ground without
using excess material.
Ø The members are usually subjected to axial force,
bending or torsion on the combination of all loads.
Ø The members subjected to tension are called as
tension members. Ex. Tie.
Ø The members subjected to compression are called as compression
members. Ex. Columns or strut.
Ø The members subjected to bending are called as
flexural members. Ex. Beams.