Podcast
Questions and Answers
Why are the steel beams temporarily fixed to the abutment during the erection process?
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?
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?
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?
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 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?
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?
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?
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?
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?
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.
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.
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.
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.
I-shaped beams and trusses are not good options to better handle the forces.
