Bridge Construction and Structural Stress Quiz
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Questions and Answers

Why are the steel beams temporarily fixed to the abutment during the erection process?

  • To create bending moments at the pier bases
  • To avoid significant stressing of the piers during erection (correct)
  • To facilitate movement of the piers during erection
  • To lengthen or shorten the beams during erection

    • What is the potential consequence of a variation in temperature on the steel beams and piers during bridge erection?

  • Lengthening or shortening of the beams leading to movement of piers (correct)
  • Increase in support from the piers
  • No impact on the piers
  • Decrease in flexibility of the steel beams

    • Why is it suggested to leave the bearings between the beams and piers temporarily free to move during erection?

  • To fix the beams to the central piers during erection
  • To decrease support from the piers
  • To increase flexibility of the steel beams
  • To avoid bending moments and forces at the pier bases (correct)

    • What is the purpose of making the bearings at the abutments moving bearings in the final state of bridge construction?

    <p>To accommodate movement of the steel beams due to temperature variations</p> Signup and view all the answers

    What can result if the steel beams are not temporarily fixed to the abutment during erection?

    <p>Significant stressing of the piers</p> Signup and view all the answers

    What can happen if the steel beams are not temporarily fixed to the abutment during bridge erection?

    <p>The piers may experience bending moments exceeding those in service</p> Signup and view all the answers

    Why is it suggested to leave the bearings between the beams and piers temporarily free to move during bridge erection?

    <p>To prevent excessive bending moments at the pier bases</p> Signup and view all the answers

    What is a potential consequence of a variation in temperature on the steel beams and piers during bridge erection?

    <p>Bending moments at the pier bases exceeding those in service</p> Signup and view all the answers

    In the final state of bridge construction, what is the purpose of making the bearings at the abutments moving bearings?

    <p>To allow for expansion and contraction of the steel beams</p> Signup and view all the answers

    Why might leaving the bearings between the beams and piers temporarily free to move during erection be wise?

    <p>To avoid significant stressing of the piers during erection</p> Signup and view all the answers

    Truss structures are inefficient in exploiting the strengths of materials as only axial forces are resisted in members.

    <p>False</p> Signup and view all the answers

    Top and bottom members of a truss sustain bending, while diagonal members sustain shear.

    <p>True</p> Signup and view all the answers

    Truss is less rigid than a beam as it has the ability to dissipate the load through many members.

    <p>False</p> Signup and view all the answers

    I-shaped beams and trusses are not good options to better handle the forces.

    <p>False</p> Signup and view all the answers

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