1. Sanjivani Rural Education Society's
Sanjivani College of Engineering, Kopargaon 423603.
-Department of Civil Engineering-
By
Mr. Sudhir B. Gayake (Assistant Professor)
Mail Id- gayakesudhircivil@sanjivani.org.in
2. Introduction to Structures-
๏ง A combination of elements/members connected
together to sustain applied loads and
transfer it safely to ground is called as structure.
๏ง A field of civil engineering dealing with the
analysis and design of structures that
resist load is called as structural engineering.
๏ง Structural design is classified is two categories
as functional aspect and strength aspect.
Prof. Sudhir B. Gayake, SCOE Kopargaon
3. Types of structures-
a) Based on use of material (Concrete/Steel/Composite)
b) Based on analysis of structure(Determinate/Indeterminate)
c) Based on load transfer ( Load bearing/Framed)
d) Based on design life ( Temporary/Permanent/Important)
Members of structure-
Depending on the orientation of the member and
its use the member is subjected to either axial force,
bending action, shear force ,torsional force or
combination of above.
Steel Structure-
It is a assemblage of group of elements
interconnected and
expected to sustain and transfer of loads
acting on it. The elements are rolled c/s to a
standard shape in shop and connected with rivets/bolts/welds.
Prof. Sudhir B. Gayake, SCOE Kopargaon
4. Comparison between Steel & Concrete structure-
Concrete Structure Steel Structure
Cast in situ Fabricated at shop & erected at site
Has control over c/s and shape Standard rolled section available
Higher Weight/Strength Ratio Smaller Weight/Strength Ratio
Speed of construction is less Faster rate of completion
Obstruction of column Large column free area available
Transportation is difficult Easy for transport
Less chances of addition and
alterations
Easy up gradation and expansion
Zero scrap Value Has large scrap value
No recycling of material Ultimate recycling can be done
Brittle type structure Ductile structure
Less gas and water tight Because of high density tightness possible
Prof. Sudhir B. Gayake, SCOE Kopargaon
5. Properties of structural steel (Cl.No. 2.2.4.1 Pg.No. 12)-
๏ง Classification is done based on ultimate or yield strength of material.(Fu/Fy)
๏ง The mechanical properties depend on chemical composition, rolling methods, heat
treatment etc.
๏ง Chemical composition-(Ferrous/iron=95 to 98%)
Carbon
(C)
Manganese
(Mn)
Sulphur
(S)
Phosphorus
(P)
Silicon
(Si)
Upto 2% (Low)
>2% (high)
1.5 0.050 0.0050 0.40
Prof. Sudhir B. Gayake, SCOE Kopargaon
6. Various rolled sections available- A) Structural Section
I-section Channel section Tee section Angle section
B) Non Structural Sections-
IS Flats (b x t) Round bar (d) Square bar (axa)
Plates (t)
Prof. Sudhir B. Gayake, SCOE Kopargaon
