Structural Theory Analysis: Idealized Structures
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Questions and Answers

Why can an exact analysis of a structure never be carried out?

  • Because the loadings and material strengths can only be estimated. (correct)
  • Because the structural engineer lacks the ability to model or idealize a structure.
  • Because the points of application for the loadings cannot be estimated.
  • Because the strength of the materials composing the structure cannot be estimated.

    • What is the purpose of developing the ability to model or idealize a structure?

  • To perform a practical force analysis of the members. (correct)
  • To make the structure more visually appealing.
  • To reduce the cost of fabricating joints.
  • To allow for slight rotation in the support connections.

    • In what ways are pin connections, roller connections, and fixed joints different?

  • In their cost of fabrication.
  • In their aesthetic appeal.
  • In their ability to support different materials.
  • In the degree of rotation they allow. (correct)

    • Why are most timber structures assumed to be pin connected?

    <p>Because bolting or nailing them will not sufficiently restrain them from rotating with respect to each other.</p> Signup and view all the answers

    What are fixed joints also known as?

    <p>Rigid connections</p> Signup and view all the answers

    Why is a fixed joint more expensive to fabricate compared to pin or roller connections?

    <p>Because it does not allow any relative rotation between the connected members.</p> Signup and view all the answers

    What is the effect of a smooth surface on a member in contact with it?

    <p>It exerts a normal force but does not prevent rotation of the member</p> Signup and view all the answers

    What will a fixed support exert on a member at the point of connection?

    <p>Three force components and a moment</p> Signup and view all the answers

    How does a smooth surface affect the rotation of a member?

    <p>It allows rotation and prevents translation of the member</p> Signup and view all the answers

    What happens when a member is in contact with a smooth surface?

    <p>It exerts a normal force but allows rotation of the member</p> Signup and view all the answers

    What kind of support develops only one unknown at the point of connection?

    <p>A roller support</p> Signup and view all the answers

    How many force components and moments does a fixed support exert on a member?

    <p>Three force components and a moment</p> Signup and view all the answers

    What does a pin support idealize as?

    <p>A typical pin support</p> Signup and view all the answers

    What is the effect of a smooth surface on a member in contact with it?

    <p>It allows rotation but prevents translation of the member</p> Signup and view all the answers

    What does a pin support idealize as?

    <p>A typical pin support</p> Signup and view all the answers

    What kind of support develops only one unknown at the point of connection?

    <p>A pin support</p> Signup and view all the answers

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