Introduction to Steel Design Dr.Kamaran S.Ismail

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Questions and Answers

Why are structural steels considered tough?

They have low elongation.

They are not susceptible to corrosion.

They are resistant to large deformations.

They have high strength and high ductility. (correct)

What advantage does steel have that allows it to be bent, hammered, and sheared without visible damage?

High resistance to corrosion

Toughness with large elongation (correct)

High tensile strength

Increased resistance to buckling

Why do most steels need periodic painting when freely exposed to air and water?

To reduce elongation during tension

To prevent corrosion (correct)

To increase their tensile strength

To prevent susceptibility to buckling

In what common situation does the strength of structural members reduce significantly?

When exposed to high temperatures Signup and view all the answers

How does the danger of buckling in a compression member change with an increase in length and slenderness?

It increases Signup and view all the answers

What allows steel structures to have new bays or entire wings added to them without issues?

Toughness and ability to withstand large deformations Signup and view all the answers

What undesirable property of steel is mentioned in the text?

Reduction in strength due to stress reversals Signup and view all the answers

Which type of structures are listed as examples of where steel is used?

Multi-storey & high-rise buildings Signup and view all the answers

What is emphasized about the structural shapes of steel in the text?

Large moments of inertia in proportion to their areas are desirable Signup and view all the answers

What organization published the Steel Construction Manual?

American Institute of Steel Construction (AISC) Signup and view all the answers

What type of shapes, commonly used in steel structures, are mentioned in the text?

I, T, and C shapes Signup and view all the answers

How are structural shapes identified for use in drawings, specifications, and designs?

By a standardized system described in the AISC Manual Signup and view all the answers

Why is the high strength of steel per unit of weight important in construction?

To minimize the weight of structures, especially for long-span bridges and tall buildings Signup and view all the answers

How does the uniformity of steel properties compare to reinforced-concrete structures?

Steel properties remain consistent over time, unlike reinforced-concrete Signup and view all the answers

Which mechanical property of steel allows it to withstand extensive deformation without failure under high tensile stresses?

Ductility Signup and view all the answers

Why is the characteristic of elasticity in steel advantageous in design?

It allows steel to follow Hooke's law up to high stresses Signup and view all the answers

What is the implication of the property of permanence in steel frames?

Steel frames can last indefinitely with proper maintenance Signup and view all the answers

How does the property of ductility in steel contribute to its structural behavior?

'It allows steel to deform significantly without breaking under high tensile stresses' Signup and view all the answers

Study Notes

Structural Steels

Structural steels are considered tough because they can withstand bending, hammering, and shearing without visible damage.
Steel's ability to be bent, hammered, and sheared without damage is due to its advantage of being ductile and having high strength.

Corrosion and Protection

Most steels need periodic painting when exposed to air and water to prevent corrosion.
The strength of structural members can reduce significantly in situations where corrosion occurs.

Buckling in Compression Members

The danger of buckling in a compression member increases with an increase in length and slenderness.
As compression members become longer and more slender, they are more susceptible to buckling.

Steel Structures and Modifications

Steel structures can have new bays or entire wings added to them without issues due to the flexibility of steel.
The property of ductility in steel allows it to withstand extensive deformation without failure under high tensile stresses.

Undesirable Properties of Steel

The undesirable property of steel mentioned in the text is corrosion.

Types of Steel Structures

Examples of structures where steel is used include high-rise buildings, long-span bridges, and industrial buildings.

Structural Shapes of Steel

The text emphasizes the importance of structural shapes of steel, which are standardized and widely available.
The American Institute of Steel Construction (AISC) published the Steel Construction Manual, which provides guidelines for steel design and construction.

Identification and Properties of Steel

Structural shapes are identified for use in drawings, specifications, and designs using a standardized system.
Steel has high strength per unit of weight, which is important in construction because it allows for efficient use of materials.
The uniformity of steel properties is superior to reinforced-concrete structures, which can have varying properties.
The mechanical property of steel that allows it to withstand extensive deformation without failure under high tensile stresses is ductility.

Elasticity and Permanence

The characteristic of elasticity in steel is advantageous in design because it allows steel to return to its original shape after deformation.
The property of permanence in steel frames implies that they can maintain their shape and structure over time.

Ductility and Structural Behavior

The property of ductility in steel contributes to its structural behavior by allowing it to absorb energy and deform without failing under high tensile stresses.

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Description

Explore the fundamentals of steel design with Dr. Kamaran S. Ismail. Learn about the organized combination of structural steel members, their ability to carry loads, and provide rigidity in structures. Dive into the versatile properties of steel as a structural material.