Steel Structures ACE Academy GATE IES Notes Free Download PDF

STEEL STRUCTURES

GATE – IES – GOVT EXAMS – HANDWRITTEN NOTES

ACE ACADEMY TRAINING NOTES

FREE DOWNLOAD PDF

TITLE : STEEL STRUCTURES – GATE/IES/OTHER GOVT EXAMS HANDWRITTEN MATERIAL

SUBJECT : STEEL STRUCTURES

IDEAL FOR : GATE,IES, PSU’S – CIVIL ENGINEERING, TSPSC AE/AEE, OTHER CIVIL ENGINEERING GOVERNMENT SECTOR EXAMS.

CONTENTS :

Materials and Specifications
Bolted Connections
Welded connections
Eccentric Connections
Tension Members
Compression Members
Column Bases and Column splices
Beams
Plate Girder
Gantry Girders
Roof Truss

Steel Structures

Advantages of structural Steel over Concrete

Higher strength :
For M20 concrete, Fck=20Mpa
For Mild steel, Fck=250Mpa
Compressive and tensile strength of steel are equally good. But got concrete, tensile strength is approximately 1/10th part compressive strength.

More economical : Higher strength to weight ratio for steel compared to concrete. Tall buildings, large span buildings, bridges etc are therefore constructed with structural steel.
Rapid construction : Construction of structure can be completed quickly.
Easy repair or modification.
Ductile material : For steel, percentage elongation is greater than 20%, show less signs of failure.
100% scrap value (reusage value) Existing steel members can be dismantled and re used for another application with 100% strength
Overall construction cost is lesser : Cost of material, cost of man power, cost of maintenance , dismantling cost etc are cheaper.
High quality and reliability : Lesser values of factor of safety and partial safety factor for steel are because it’s a factory product. Quality control is proper and uncertainties are less.

Corrosion and proneness to catch fire are the two disadvantages of steel compared to concrete. To make them corrosive and fire resistant,it’s an expensive process. Nickel and chromium content is more in stainless steel giving it anti corrosive properties.

Mechanical properties imparted by carbon :
1. Yield strength
2. Ultimate tensile strength
3. Hardness
4. Ductility
5. Toughness

Carbon content : 0.23% fy-250Mpa and 0.27% fy-350Mpa

Classification of steel based on carbon content :
1. Low carbon steel – 0.1 to 0.25%
2. Medium carbon steel – 0.25 to 0.6%
3. High carbon steel – 0.6 to 1.1%

Low Carbon : Mild steel used in RCC constructions as reinforcement and structural steel section used in steel building construction.
Medium Carbon : Rails, tyres,high tensile steel and hammers etc
High Carbon : Stone masonry tools, drills, punches etc

As carbon content increases, yield strength, ultimate tensile strength and hardness of steel increases
As carbon content increases, ductility and toughness decreases.

Hardness must be lesser to improve weldability
Ductility and toughness are very important for structural steel subjected to dynamic and impact loads.

General classification :
1. Reinforcing steel : Used as reinforcement in RCC constructions. Ex Fe250, Fe415, Fe500 etc. where Fe is steel and 250/415/500 are yield strengths.
2. Structural steels : Used in steel building and bridge constructions. Ex : Fe410, Fe540, Fe570 etc where Fe is steel and 410/540/570 are ultimate tensile strengths.
For mild steel, fy=250Mpa and fu=415Mpa

DOWNLOAD LINK : STEEL STRUCTURES – GATE/IES/GOVT EXAMS – ACE ACADEMY HANDWRITTEN NOTES – FREE DOWNLOAD PDF – CIVILENGGFORALL

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