Bridge Construction and Structural Stress Quiz

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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?

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

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

Significant stressing of the piers Signup and view all the answers

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

The piers may experience bending moments exceeding those in service 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?

To prevent excessive bending moments at the pier bases 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?

Bending moments at the pier bases exceeding those in service 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?

To allow for expansion and contraction of the steel beams Signup and view all the answers

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

To avoid significant stressing of the piers during erection Signup and view all the answers

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

False Signup and view all the answers

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

True 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.

False Signup and view all the answers

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

False Signup and view all the answers

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?

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

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

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

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

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

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

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

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

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

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

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

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

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

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