Steel and Concrete Structures: Key Concepts

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Questions and Answers

A steel beam with a length of 10 meters is subjected to a uniformly distributed load. To minimize deflection, which cross-sectional shape is most suitable?

  • Square solid section
  • Circular solid section
  • I-section (correct)
  • Rectangular hollow section

Which type of support is most effective at resisting both vertical and horizontal forces, as well as moments?

  • Fixed support (correct)
  • Simple support
  • Roller support
  • Hinge support

What is the primary purpose of lateral bracing in steel frames?

  • To increase the axial load capacity of columns
  • To improve the aesthetic appearance of the structure
  • To prevent buckling of compression members (correct)
  • To reduce the weight of the structure

A reinforced concrete beam is designed to resist a high bending moment. Where should the main reinforcing steel be placed?

<p>Near the tension face (D)</p> Signup and view all the answers

In structural design, what does the term 'slenderness ratio' refer to?

<p>The ratio of a column's length to its least radius of gyration (B)</p> Signup and view all the answers

Why is creep more significant in concrete structures than in steel structures?

<p>Because concrete's long-term deformation under sustained load is greater (B)</p> Signup and view all the answers

Which of the following is NOT a typical method for improving the fire resistance of a steel structure?

<p>Using a thinner member size to dissipate heat more quickly (C)</p> Signup and view all the answers

A simply supported beam is subjected to a concentrated load at its mid-span. Where does the maximum bending moment occur?

<p>At the mid-span (A)</p> Signup and view all the answers

What is the main advantage of using pre-stressed concrete over reinforced concrete in structural members?

<p>Increased resistance to cracking (B)</p> Signup and view all the answers

Which of the following best describes the purpose of a shear key in a concrete structure?

<p>To transfer shear forces between adjacent concrete elements (A)</p> Signup and view all the answers

Flashcards

Stress

The force that resists the deformation of a material under stress. It's the material's internal reaction to external forces.

Strain

The deformation or displacement of a material that results from an applied stress.

Stress Concentration

A region in a structure where stresses concentrate, leading to potential failure. Common around corners or holes.

Shear Stress

Stress caused by forces acting parallel to a surface. Think of cutting paper with scissors.

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Tensile Stress

Stress caused by forces pulling on a component, tending to elongate it.

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Compressive Stress

Stress caused by forces pushing on a component, tending to shorten it.

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Yield Strength

The maximum stress a material can withstand before permanent deformation occurs.

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Ultimate Tensile Strength

The maximum stress a material can withstand before it starts to fracture or break.

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Modulus of Elasticity

A measure of a material's stiffness, representing the ratio of stress to strain in the elastic region.

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Resilience

The ability of a material to absorb energy when deformed elastically and release that energy upon unloading.

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